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1. Vimax maximum voltage at H winding taps Vimu minimum voltage at H winding taps nominal voltage at H winding taps If a nameplate has information on total change of voltage in percent for example 10 from nominal voltage the following formula may be used to calculate the difference per tap Total of voltage change n 1 Where n number of H taps Note The aforementioned calculations are true only if a transformer has the same voltage change per tap This selection returns you to the MAIN MENU screen Figure 6 2 AVTMTTR310 Rev B Sept 2008 75 Megger FULL TEST SETUP 2 Screen Figure 6 7 If 1 is selected on the FULL TEST SETUP 1 screen the FULL TEST SETUP 2 screen Figure 6 7 appears 1 2 3 4 5 6 7 8 9 1 FULL TEST SETUP 2 CONTINUE X NAMEPLATE VOLTAGE L L 5000 NO OF H TAPS 33 NOMINAL VOLTAGE X TAP NO 17 HIGH VOLTAGE X TAP NO 33 OR16R DIFFERENCE TAP 0 625 PAUSE BETWEEN PHASES NO SAVE CUSTOM SETTINGS PREVIOUS MENU ENTER SELECTION FROM KEYPAD Figure 6 7 FULL TEST SETUP 2 Screen The previously entered information from the last transformer tested is displayed on the screen 1 CONTINUE This selection brings up the FULL TEST SETUP 3 screen shown in Figure 6 8 2X NAMEPLATE This selection is used to enter the nameplate low voltage VOLTAGE L I rating of the transformer to be tested L L stands for line to line The t
2. 4 MAIN MENU Quick Test Setup Screen This selection allows you to enter up to a 12 character alphanumeric identification of a transformer Skip this step if you do not want to enter this information When selected the screen appears the same as Figure 6 3 except for a message at bottom of screen ENTER UP TO 12 CHARACTER ID USE TO SELECT LETTER A cursor will blink on the line next to TRANSFORMER ID This selection is used to enter the diagram number vector group of the transformer to be tested This diagram number must be entered for testing any transformer windings see selections 7 8 9 on the Main Menu screen When 2 TRANSFORMER TYPE is selected the screen appears the same as Figure 6 3 except for message at bottom of screen ENTER TRANSFORMER DIAGRAM NUMBER REFER TO TABLE ON INSTRUCTION CARD Cursor will blink on the line next to TRANSFORMER TYPE in place of DIAG 01 1ph0 This selection initiates testing of a transformer See Figure 6 4 for the next screen displayed Initial Quick Test Result Screen This selection returns you to the main menu screen Figure 6 2 AVTMTTR310 Rev B Sept 2008 71 Megger Quick Test Result Screens Figure 6 4 and Figure 6 5 If 3 START TEST is selected on the QUICK TEST SETUP menu Figure 6 3 the initial quick test result screen shown in Figure 6 4 appears This screen is displayed during testing of a transformer THREE PHASE TRANSFORMER TEST TEST nnn I
3. C2 A2 C2 A2 N C2 2 N 2 A2 2 A2 N SETUP CONNECTIONS Transformer Winding Phase Relationship Australian Std 2374 Part 4 1982 High Low Voltage Voltage Winding Winding Measured Turn Ratio Remarks No accessible neutral on LV winding No neutral accessible on HV winding No neutral accessible on HV amp LV windings Neutral accessible on HV amp LV windings No neutral accessible on LV winding No neutral accessible on HV winding AVTMTTR310 Rev B Sept 2008 63 Table 5 6 Transformer Winding Phase Relationship Australian Std 2374 Part 4 1982 Copyright 1999 Megger Winding Connection IEC indi Low Vector High Voltage Low Voltage Voltage Voltage Measured Group Winding HV Winding LV Winding Winding Turn Remarks Ratio No neutral accessible on HV amp LV windings With or without neutral accessible on wye winding No neutral B gt C Az B2 C2 accessible C2 Ao Bo C gt rA2 on HV amp LV Ao Bo C2 A2 B2 windings With or without neutral accessible on wye winding No neutral B2 C2 A B2 C2 accessible C2 Ao Bo 2 on HV amp LV Ao Bo A2 B windings Neutral accessible on wye winding AVTMTTR310 Rev B Sept 2008 64 SETUP AND CONNECTIONS Table 5 6 Transformer Winding Phase Relationship Australian Std 2374 Part 4 1982 Copyright 1999 Megger
4. Low Voltage Winding X H2 B Phase Tested ANSI Transformer Winding Phase Relationship Winding Tested Winding High Low Shorted Voltage Voltage Measured By TTR Winding Winding Turn Ratio Remarks Neutral accessible both wye windings Neutral accessible on wye winding Neutral Visa accessible on wye winding No accessible neutral on wye winding Neutral accessible on wye winding No accessible neutral on wye winding Hi Hs Hz Hz Hi H3 Ha Hz H Ha H2 Hz H H3 Hs Ho H Vi Vx VH r VH Kr Vue Vx Vae 3 Vx Vyev3 Vx AVTMTTR310 Rev B Sept 2008 40 SETUP AND CONNECTIONS Table 5 4 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection IEC Winding High Low Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured Winding H Winding X Tested By TTR Winding Winding Turn Ratio Remarks H H3 H2 V 3 No Hz Hi H3 accessible H3 H2 H neutral on wye winding 3 Neutral H accessible on wye winding Hev3 No H4 Hs Hz Hz Hi H3 Hs Hz H4 V accessible neutral on wye winding No accessible neutral No accessible X neutral x B X Ja X H H x H V V V V W V V No accessible we neutral on x low voltage winding AVTMTTR310 Rev B Sept 2008 41 Megger Table 5 4 ANSI Transformer Winding Phase Relations
5. Group Winding U1 Winding U2 Tested Winding Winding Turn Ratio Remarks Single phase 1 R 1 1 1 1 2 2 1 2 2 ES transformer Single phase is m 1 1 1 2 2 2 2 1 15 transformer 2U 2V 2V 2W 2W 2U Y 02 2 I alll N N Oc 0 2 20 211 O 2W 2 Dd10 AVTMTTR310 Rev B Sept 2008 50 SETUP AND CONNECTIONS Table 5 5 CEI IEC 76 1 1993 Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested IEC Winding High Low Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured Group Winding U1 Winding U2 Tested By TTR Winding Winding Turn Ratio Remarks 1U 2U Q Neutral accessible on wye winding No neutral accessible on wye winding Neutral accessible on wye winding No neutral accessible on wye winding Neutral accessible on wye winding No neutral accessible on wye winding AVTMTTR310 Rev B Sept 2008 51 Table 5 5 Copyright 1999 Megger CEI IEC 76 1 1993 Transformer Winding Phase Relationship Winding Connection IEC Vector High Voltage Group Winding U1 1U Q 2U Low Voltage Winding U2 Phase Tested U V W U V Ww U V W U V Ww U V W U V Winding Shorted By TTR Winding Tested High Voltage Winding 1U 1V 1W 1V 1W 1U 1W 1U 1V 1U 1V 1V 1W 1W 1U 1U 1V 1W 1V 1W 1U 1W 1U 1V 1U 1V 1V 1W 1W 1U Low Voltage Winding Measure
6. Megger 10 How to change Languages a Select the Tools gt Options menu item b Select the appropriate language in the dropdown menu Language IntemationalEnglish v Measurements Default Units Metric v Temperature Units C Logos Left C Program Files PowerDB Inc amp PowerDB powerdb megger slug Right C Program Files PowerDB Inc PowerDB your_company_logo br fal Cancel 11 How to change units of measurement a Select the Tools gt Options menu item b Select the units in the drop down Default Units under Measurements Language IntemationalEnglish v Measurements Default Units Metric v Temperature Units gt C w Logos Left C Program Files PowerDB Inc PowerDB powerdb megger slug Es Right C Program Files PowerDB Inc PowerDB your company logo br zi AVTMTTR310 Rev B Sept 2008 2 104 PowerDB Lite 12 Additional Notes a Additional forms can be filled out by repeating steps 2 3 and 6 b Forms can be printed with the File gt Print menu item or type CTRL P or press the Print toolbar button c A help guide may be found in the Help gt PowerDB Lite Help menu item Frequently Asked Questions FAQ s 1 Can I change the forms No You must have the full version of PowerDB to change forms 2 Can I synchronize forms to a database No You must have the full version of PowerDB for database support and to synchronize multiple fiel
7. kv Tap kv Ratio Ratio mA min Ratio Error Ratio COMMENTS AVTMTTR310 Rev B Sept 2008 106 PowerDB Lite Operating Instructions for the Simple 3PH TTR Form This form can be used for testing a two or three winding transformer with multiple taps on one or more of the windings If you are testing a three winding transformer please check the Has Tertiary checkbox Next select the winding configuration by using the left and right arrow keys Press the Enter or Tab key to move to the next field The default total number of tests is defined as follows 1 Test for each secondary or tertiary tap tested with the primary nominal tap 2 Test for each primary tap with the nominal secondary or tertiary tap If you do not wish to test all of the secondary or tertiary taps you can reduce the tests field for each category of tests primary secondary tertiary Once the total number of taps and the tests field are entered the form will display the correct number of rows to perform testing Once the voltage is entered for the first and last tap values from the transformer s nameplate tap voltage table the ratios for all taps will automatically be calculated and populated Please note that the calculated values can be over written Right click on each of the blue highlighted fields in each table to run the tests AVTMTTR310 Rev B Sept 2008 107 Megger PowerDB Lite T
8. 1U 1V Low Voltage Winding Measured Turn Ratio Remarks No neutral accessible on wye winding Neutral accessible on wye winding No neutral accessible on wye winding Neutral accessible on wye winding No neutral accessible on wye winding AVTMTTR310 Rev B Sept 2008 58 Notes to Table 5 6 SETUP AND CONNECTIONS Transformer terminal markings for power transformers marked in accordance with requirements of Australian Standard 2374 Part 4 1982 Definition of Symbol Designations as Da c N HV winding LV winding 5 5 a b c 5 5 External terminals on HV transformer winding A B C External terminals on LV transformer winding a b c gt External neutral terminal on HV transformer winding External neutral terminal on LV transformer winding Inaccessible neutral point on HV or LV transformer winding Nameplate voltage rating line to line of HV transformer Nameplate voltage rating line to line of LV transformer Winding tested on HV side of transformer Winding tested on LV side of transformer IEC Vector Group Coding The letters indicate the three phase winding connections D Y and Z designate the HV side winding d y and z designate the LV side winding D and d represent a delta connection Y and y represent a wye connection and Z and z represent a zigzag connection N and n indicate that the neutral point of a star o
9. keep the battery and other electrical connectors clean and free of corrosion Always unplug the inverter when it is not in use The inverter has numerous built in protection features which prevent internal damage The most important of these features include 1 Low battery voltage if the battery voltage at the inverter drops below the under voltage cut off 10 6 V dc the inverter will automatically shut off When battery voltage increases to 95 of nominal battery voltage 13 8 V dc the inverter will restart 2 High battery voltage if the battery voltage input rises above the over voltage cut off 16 5 V dc the inverter will automatically shut off When the battery voltage input drops back to the normal voltage range it will turn itself back on 3 Over temperature if the inverter gets too hot due to high ambient temperature blocked air flow or overload conditions it will automatically shut off Howevet when the inverter reaches an acceptable temperature it will automatically turn back on 4 Overpower the inverter will source up to it s maximum power rating however if the load requires more than this the output voltage will be lowered to supply no more than it s maximum power In this way the maximum power from the inverter is reduced to a safe amount AVTMTTR310 Rev B Sept 2008 92 7 TTR 300 Series PowerDB Lite User Manual Introduction PowerDB Lite is a free but limited capability version of
10. 19 CONTROLS INDICATORS AND CONNECTORS 19 CT SETUP FOR TESTING 22 D DESCRIPTION 13 E ELECTRICAL SPECIFICATIONS 7 EMERGENCY SHUTDOWN 67 ENVIRONMENTAL CONDITIONS 10 ERROR MESSAGES 88 F FLOW CHART OPERATIONAL 15 FULL TEST SETUP 1 SCREEN 74 FULL TEST SETUP 2 SCREEN 76 AVTMTTR310 Rev B Sept 2008 119 Megger FULL TEST SETUP 3 SCREEN 78 FUSE REPLACEMENT 111 G GENERAL INFORMATION 1 GLOSSARY 117 I INTRODUCTION 1 K KEYPAD 19 L LANGUAGE SCREEN 85 M MAIN MENU SCREEN 69 MAIN MENU SCREEN AFTER SELECTION OF A CUSTOM TRANSFORMER SETTING 83 MAINTENANCE 111 MARKINGS TEST LEAD 23 25 MENUS DESCRIPTION OF 67 O OPENING DISPLAY SCREEN 68 OPERATION General Procedure 67 Principal of 13 Remote Control 89 OPERATIONAL FLOW CHART 15 OPTIONAL ACCESSORIES 11 OPTIONAL INVERTER USE 92 P PHASE A TEST RESULT 81 PRINCIPLE OF OPERATION 13 PRINTER USE WITH OPTIONAL 90 PRINTOUT SAMPLE 91 Q QUICK TEST RESULT SCREEN FINAL 73 QUICK TEST RESULT SCREEN INITIAL 72 QUICK TEST SETUP SCREEN 71 R RECALL OR SAVE CUSTOM TRANSFORMER SETTINGS 87 RECEIVING INSTRUCTIONS 1 REMOTE CONTROL OPERATION 89 REMOTE CONTROL OPERATION FOR LTC TESTING 89 REPAIR 116 ROUTINE MAINTENANCE 111 AVTMTTR310 Rev B Sept 2008 120 INDEX S SAFETY 3 SAMPLE PRINTOUT OF TEST REPORT 91 SAVED DATA SCREEN 86 SCREENS Full Test Setup 1 74 Full Test Setup 2 7
11. 8 9 FULL TEST SETUP 1 CONTINUE TRANSFORMER ID nnnnnnnnnnnn TRANSFORMER TYPE DIAG nn H NAMEPLATE VOLTAGE L L 250000 NO OF H TAPS 5 NOMINAL VOLTAGE H TAP NO 3 HIGH VOLTAGE H TAP NO 1 DIFFERENCE TAP 2 5 MAIN MENU ENTER SELECTION FROM KEYPAD Figure 6 6 FULL TEST SETUP 1 Screen The last tested transformer information previously entered is displayed on the screen 1 CONTINUE This selection brings up the FULL TEST SETUP 2 screen Figure 6 7 2 TRANSFORMER ID This selection allows you to enter up to a 12 character alphanumeric identification of a transformer Skip this step if you do not want to enter this information When selected the screen appears the same as Figure 6 6 except for a message at bottom of screen ENTER UP TO 12 CHARACTER ID USE TO SELECT LETTERS A cursor will blink on the line next to TRANSFORMER ID 3 TRANSFORMER This selection is used to enter the diagram number vector TYPE group of the transformer to be tested This diagram number must be entered for testing a transformer Diagram numbers for the most common types of transformers are included on the instruction cards in the lid of the TTR310 test set When selected the screen appears the same as Figure 6 6 except for the message at bottom of screen ENTER TRANSFORMER DIAGRAM NUMBER REFER TO TABLE ON INSTRUCTION CARD A cutsor will blink on the line next to TRANSFORMER AVTMTTR310 Rev Sept 2008 7
12. H Hz H H5 Ha Hz H Neutral accessible on wye winding No accessible neutral on wye winding HHH Ha Hi H3 Ha Ho H1 Neutral accessible on wye winding A B C A B C A B C A B C B C Nga Vx 2 VH Vx V3 No H H3 Hp V 3 accessible Ho Hi Hs Miss neutral on x wye winding Vx 2 VH Vx V3 AVTMTTR310 Rev B Sept 2008 45 Megger Table 5 4 ANSI Transformer Winding Phase Relationship Winding Connection Winding High Low Diag High Voltage Low Voltage Phase Shorted Voltage Voltage Measured No Winding H Winding X Tested By TTR Winding Winding Turn Ratio Remarks gt E tf Neutral PESE accessible on wye winding Copyright 19990 Megger No H HatH accessible Hi H2 Hi Hs ar neutral on H gt H Hs H2 H1 wye winding Ha H gt Hi Ha H2 No Dy3 H Ho H Hs accessible Hoa Hi neutral on wye winding Neutral accessible on wye winding No Ha H gt Hi Hs H2 accessible Hi Hs Hz Hi H3 neutral on Ha Hi Hs Ha H1 wye winding AVTMTTR310 Rev B Sept 2008 46 SETUP AND CONNECTIONS Table 5 4 ANSI Transformer Winding Phase Relationship Winding Connection IEC Winding High Low Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured Winding H Winding X Tested By TTR Winding Winding Turn Ratio Remarks Copyright
13. IEC High Low Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured Group Winding HV Winding LV Tested By TTR Winding Winding Turn Remarks No neutral A2 B2 C accessible B C2 A on wye A2 B2 winding Neutral accessible on wye winding No neutral B2 C2 accessible Bz C2 A2 on wye A2 B2 winding Neutral 82 b2 C2 accessible b2 C2 a2 on zigzag c2 a2 b winding No neutral accessible on zigzag winding Neutral accessible on zigzag winding AVTMTTR310 Rev B Sept 2008 65 Table 5 6 Transformer Winding Phase Relationship Australian Std 2374 Part 4 1982 Copyright 19990 Megger IEC High Low Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured Group Winding HV Winding LV Tested By TTR Winding Winding Turn Remarks Ratio No neutral accessible on zigzag winding No A4 N accessible B4 N neutral on LV N winding C A4 B4 C4 A4 e on HV amp LV Aa Ba C4 A4 B4 windings No A4 N accessible Ba N neutral on LV N winding No neutral A A B4 C4 accessible B4 C4 A4 on HV amp LV A4 B4 windings 66 No neutral B C A B C4 accessible A B C A B C A B C A B C B C AVTMTTR310 Rev B Sept 2008 6 Operation General Operating Procedure Proceed only after reading and fully understanding Section 2 Safety and settine
14. Listed TestVotsge x HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS LastTap Vot ge 3 DEFICIENCIES AVTMTTR310 Rev Sept 2008 00 Megger d To change the settings of the TTR place the mouse on the form and right click Then select TTR Settings TTRPrefs E xj TTR Settings Show Diag Number Z Standard ANSI Test Voltage OK e This dialog box allows you to change the TTR settings The settings that can be changed are as follows 1 Show Diagram Number When enabled this will display a numeric field below the winding configuration diagram on the form The diagram can then be changed by entering a number in this field 2 Standard This enables you to choose between the ANSI Australian or TEC Standard 3 Test Voltage This enables you to choose the test voltage at which the test is run Auto allows the instrument to choose an acceptable test voltage for testing You may choose between Auto 8 40 or 80 4 Running an Automated Test a Select the Initialize Instrument button ES b Automated fields should now turn cyan colored c Right click on the cyan colored fields d Follow the on screen instructions specific to the test AVTMTTR310 Rev B Sept 2008 100 PowerDB Lite 5 Comments and Deficiencies When imported into the full version of PowerDB the comments and deficiencies on each form are used to generate summary repor
15. Lite files soned wasa NE Choose Destination Location Select folder where setup will install files Setup will install PowerDB in the following folder To install to this folder click Next To install to a different folder click Browse and select another folder Destination Folder C Program Files PowerDB IncPowerDB Browse lt Back Cancel AVTMTTR310 Rev B Sept 2008 95 Megger 7 Select Default Settings r Default Settings Language American English Default Units mpeid InstallShield m 8 InstallShield Wizard will complete the installation of PowerDB Lite Click Finish to close the installation program E PowerDB InstallShield Wizard InstallShield Wizard Complete Setup has finished installing PowerDB on your computer Back Cancel AVTMTTR310 Rev B Sept 2008 96 PowerDB Lite Using PowerDB Lite 1 Home 1 Select your Instrument from the Instrument Setup screen a You can always view the Instrument Setup screen from the Tools menu or b Select the appropriate row in the Description column Then click the button in the Setup column Instruments Setup Description Setup Current Transformer Earth Forms Megohmmeter Power Factor Test Set set um Time Domain Reflectometer pesi pd Transformer Turns Ratio Learn more about PowerD
16. MENU screen Figure 6 2 the SAVED DATA screen appears as shown in Figure 6 14 VIEW READINGS DELETE LAST READING DELETE ALL READINGS SAVED DATA TRANSFER READINGS TO PC MAIN MENU ENTER SELECTION FROM KEYPAD Figure 6 14 SAVED DATA Screen Use this menu to view delete or transfer to a PC the saved test results 1 VIEW READINGS 2 DELETE LAST READING 3 DELETE ALL READINGS 4 TRANSFER READINGS PC 5 MAIN MENU This selection allows you to specify the first test number to view and then on prompt the number of tests to view The test results will be displayed on the screen prompt line will show three prompts 0 NEXT 1 PRINT and 2 EXIT Select NEXT to view the next reading in numerical order select PRINT to print test results Select EXIT to return to SAVED DATA screen This selection deletes from memory the last reading saved This selection deletes all readings from memory This selection allows to select which test results to transfer to a PC This selection returns you to the MAIN MENU screen Figure 6 2 AVTMTTR310 Rev B Sept 2008 86 OPERATION Recall or Save Custom Transformer Settings Figure 6 15 If 3 RECALL CUSTOM SETTINGS is selected on the MAIN MENU screen Figure 6 2 the RECALL CUSTOM SETTINGS screen appears as shown in Figure 6 15 If 8 SAVE CUSTOM SETTINGS is selected on the FULL TEST SETUP 2 menu Figure 6 7 the screen appears the same as in Figur
17. SEN VECTOR PHASE ROTATION X tV 24M REFERENCE a LV REFERENCE 4 PHASE ROTATION X1 X3 X2 b LV REFERENCE ques 7 PHASE ROTATION X3 X2 c X3 SAT ION E A REFERENCE d IEC VECTOR GROUP CODING Dyn1 PHASE DISPLACEMENT 30 LAG IEC VECTOR GROUP CODING Dyn5 PHASE DISPLACEMENT 150 LAG IEC VECTOR GROUP CODING Dyn1 PHASE DISPLACEMENT 30 LAG IEC VECTOR GROUP CODING YNd7 PHASE DISPLACEMENT 210 LAG Figure 5 10 Winding Connections and Phase Relationship AVTMTTR310 Rev B Sept 2008 36 SETUP AND CONNECTIONS Notes to Table 5 4 Transformer terminal markings for distribution and power transformers marked in accordance with requirements of American National Standard Institute Inc ANSI standard C57 12 70 1978 Definition of Symbol Designations H H H Xi x winding Vy winding External terminals on HV transformer winding External terminals on LV transformer winding External neutral terminal on HV transformer winding External neutral terminal on LV transformer winding Inaccessible neutral point on HV or LV transformer winding Nameplate voltage rating line to line of HV transformer Nameplate voltage rating line to line of LV transformer Winding tested on HV side of transformer Winding tested on LV side of transformer IEC Vector Group Coding The letters indicate the three phase winding con
18. Settings AVTMTTR310 Rev B Sept 2008 16 DESCRIPTION Quick Test Full Test Setup Setup Recall custom Settings bi System Setup Saved Data Print Menu Header Language Set Date Time Deutsch Francaise Standard IEC Test Voltage Figure 4 4 System Setup Menu Phase Display Degree Centiradian None SIS AVTMTTR310 Rev B Sept 2008 17 Megger Saved Data Quick Test Setup Menu y Y Main View Readings Transfer Readings to PC Delete Last Reading Menu START TEST of TESTS VIEW NEXT READING y Y Print Next Exit K Prints Test Data Figure 4 5 Saved Data Menu with Print Header Start Test amp of Tests Clear All Print Header AVTMTTR310 Rev B Sept 2008 18 DESCRIPTION Controls Indicators and Connectors CONTRAST TEST VOLTAGE ON EMERGENCY TEST OFF DISPLAY SCREEN KEYPAD A Contrast RS232 printer This knob adjusts the viewing resolution of the screen Red indicator lamp indicates when lit that test voltage is being supplied to a transformer This red push button interrupts testing When pressed the switch is locked in off position To reset the
19. equipment itself with precautionary warnings where appropriate It is not possible to foresee every hazard which may occur in the various applications of this equipment It is therefore essential that the user in addition to following the safety rules in this manual also carefully consider all safety aspects of the test before proceeding Safety 1s the responsibility of the user Follow your company s safety procedures i Misuse of this high voltage equipment can be extremely dangerous AVTMTTR310 Rev B Sept 2008 SAFETY The purpose of this equipment is limited to use as described in this manual Do not use the equipment or its accessories with any device other than specifically described Never connect the test set to energized equipment Do not use the test set in an explosive atmosphere s Corrective maintenance must only be performed by qualified personnel who are familiar with the construction and operation of the test set and the hazards involved Refer to IEEE 510 1983 IEEE Recommended Practices for Safety in High Voltage and High Power Testing for additional information If the test equipment is operated properly and all grounds correctly made test personnel need not wear rubber gloves As a routine safety procedure however some users require that rubber gloves be worn not only when making connections to the high voltage terminals but also when manipulating the controls Megger considers this a
20. humidity Physical Data Dimensions Weight test set m Case Accessories Supplied Item Qty Canvas catrying bag for test leads Power supply cotd 8 ft 2 5 m Ground lead 15 ft 4 6 m 23 to 122 F 5 to 50 C 58 to 140 F 50 to 60 C 0 to 90 noncondensing operating 0 to 95 noncondensing storage 17 5 x 10 5 x 6 9 in 44 5 x 26 5 x 17 5 cm L x W x H 16 5 Ib 7 5 kg Light gray color ABS case with lid and carrying strap Cat No 30915 211 17032 4 4702 7 Hand held switch assembly for remote operation RS232 serial cable for connecting to a PC Ethernet cable for connecting to a PC Bushing clips 6 Transformer Vector Voltage Diagram set for ANSI IEC and AS Standards 30915 220 35248 36798 MC7144 35314 AVTMTTR310 Rev B Sept 2008 10 Item Qty PowerDB LITE Instruction Manual Optional Accessories Item Qty 3 shielded test lead set X H windings 30 ft 3 shielded test lead set X H windings 50 ft 1 shielded test lead set X H windings 30 ft 3 shielded test lead H winding 30 ft 3 shielded test lead X winding 30 ft 3 shielded test lead H winding 50 ft 3 shielded test lead X winding 50 ft 1 shielded test lead H winding 30 ft 1 shielded test lead X winding 30 ft 3 Adapter set to allow use of Megger 550503 lead sets Power DB full version 1st machine license soft key Power DB full version 1st mac
21. identify the operation or function of the flow chart objects Embedded TTR Firmware Quick Test Full Test Recall custom System Saved Data Print Setup Setup Settings Setup Menu Menu Header Quick Test Setup user entry Test In Progress Emergency Stop Data entry Three Phase Transformer Test Print Test Data STORES TEST DATA amp ASSIGNS THE NEXT AVALIABLE TEST NUMBER Figure 4 2 Quick Test flow chart AVTMTTR310 Rev B Sept 2008 15 Megger Quick Test Setup Full Test Setup Recall custom Settings Full Test Setup 1 Previous Main pw Menu Menu ontinue Previous Menu Save Custom Settings Continue Full Test Setup 2 Previous Menu Save Custom Settings enter selection Full Test Setup 3 v Main Menu Start Test Previous Menu System Setup Menu Select Setting Recall Custom Settings enter selection Saved Data Menu Print Header est In Progress Emergency Three Phase Transformer Prints Test Data STORES TEST DATA amp ASSIGNS THE NEXT AVALIABLE TEST NUMBER YES Test Repeat Next Test Test Figure 4 3 Full Test Setup with Recall Custom
22. is measured by the excitation current measurement circuitry The test excitation voltage is applied to a transformer under test through the H winding lead select circuitry This citcuitry automatically excites the transformer windings depending on winding connections The same excitation voltage is applied to the reference conditioning circuitry The transformer under test output voltage is connected to the X winding lead select circuitry This circuitry automatically connects the transformer winding being tested to the range conditioning circuitry AVTMTTR310 Rev B Sept 2008 13 Megger ony Hil oy TRANSFORMER x OP Hz UNDER X Ha Q2 TEST OT 120 230 V AC AUTOMATIC H WIND ING O Hs Xa X WINDING 50 60 Hz RUE EXCITATION LEAD LEAD ANS ORNER VOLTAGE SELECT SELECT SUPPLY CIRCUITRY CIRCUITRY EXCITATION REFERENCE RANGE CURRENT COND I T ION ING CONDITIONING MEASUREMENT CIRCUITRY CIRCUITRY CIRCUITRY 1 REFERENCE AR CONTROL PROGRAMMABLE CONVERTER CIRCUITRY AMPLIFIER T RANGE MICROPROCESSOR A D CONVERTER RS 232 DISPLAY PRINTER Figure 4 1 Three Phase TTR310 Test Set Block Diagram The range and refe
23. or B or C POLARITY This message shows that the H or X test leads are incorrectly connected or the test transformer connections or markings do not comply with the requirements of ANSI IEC or the Australian standard If self test fails one of the following error messages will appear on the opening display screen and you should return the test set to Megger for repair Refer to Repair section for instructions ANALOG OFFSET VOLTAGE HIGH ANALOG GAIN OUT OF TOLERANCE CAN NOT DETECT FLASH RAM FAILED PROGRAM CODE CHECK PLEASE SHUT DOWN AND CHECK THE MANUAL CHECKING ALTERA GOOD BAD CHECKING DISPLAY GOOD BAD CHECKING RAM GOOD BAD Remote Control Operation for LTC Testing Use the remote control mode of the TTR310 for load tap changer LTC testing in QUICK MODE of operation The remote control mode provides two way communication between the operator and the TTR310 allowing you to stay close to an LTC change taps and initiate the test routine Connect the hand held control unit Megger p n 30915 220 to the RS232 port of the TTR310 At power up the TTR310 detects that the hand held control unit is connected and automatically sets the QUICK MODE operation To start testing specify the transformer diagram number and press 3 START TEST at QUICK MODE menu The remote control unit pushbutton lamp will go on Now an operator may come to the remote location set for example LTC to the desired position and then depress the re
24. switch twist the button in the direction indicated by the arrows LCD shows menus and test information 16 button keypad for entering menu selections and navigating through the various screens In addition to numbered keys 1 through 9 plus 0 there is a CLR clear button R raise or right button VL lower or left button an ENT enter button a decimal point button and an asterisk button An audible tone confirms that you have successfully pressed a button Display Remote trigger be Test V og M FAAN Umm RARO ger TIR310 J Figure 4 6 Three Phase TTR310 Control Panel GROUND CABLE H CABLE X Wing nut terminal allows connection of test set to earth ground Plug receptacle for connecting test leads to the high voltage H winding of a transformer Plug receptacle for connecting test leads to the low voltage X winding of a transformer AVTMTTR310 Rev B Sept 2008 19 Megger AC POWER On off power switch and input power receptacle provides 120 V 50 60 Hz power to the test set 100 VA MAX FUSE IEC 127 T 1 Fuse receptacle and rating A 250 V RS232 PRINTER Plug receptacle for connecting a printer or connecting to a PC AVTMTTR310 Rev B Sept 2008 20 5 Setup and Connections General Instructions When testing high voltage transformers caution must be used at all times and all safety precautions followed Read and understand all safety information contained in Sectio
25. to hold all accessories The test set can be used to test single phase and three phase transformers both with and without taps in accordance with the requirements of the IEEE C57 12 90 1997 standards For three phase measurements the test set is connected to all Three Phases of the transformer to be tested The TTR310 lead selection circuitry permits automatic measurement of all phases without changing connections This feature eliminates the need to refer to hook up charts when testing three phase transformers Turn ratio phase shift and excitation current readings are displayed on a large LCD Transformer excitation current as well as AVTMTTR310 Rev B Sept 2008 1 Megger phase shift angle helps to detect transformer shorted turns or an unequal number of turns connected in parallel Operating condition error messages identify incorrect test connections abnormal operating condition or winding problems Test results can be saved printed out on an optional printer or uploaded to a personal computer PC Features include Fully automatic operation Self checking at power up Self calibration at each measurement User friendly menu driven operation Test turn ratio phase shift in both degree and centiradian and excitation current Easy measuring of regular windings tertiary windings and CTs Storage capacity for up to 200 tests for retrieving printing out or uploading to a PC Saving up to 9 custom transf
26. voltage or low voltage transformer winding is designated by the symbol For many utilities different manufacturer nameplate diagrams make it impossible to always find a corresponding diagram on Tables 5 4 to 5 6 To help determine the correct connection and to test any transformer the following explanation will help self check your work AVTMTTR310 Rev B Sept 2008 34 SETUP AND CONNECTIONS Figure 5 10 a shows the relationship in a typical delta wye connected transformer with accessible neutral connection point The delta winding is the high voltage winding and the terminals are marked H H and H The wye winding is the low voltage winding and the terminals are marked X X X and X Determine which windings lines are parallel to each other In the diagram winding 1 parallel to X X as illustrated by the two solid straight arrows Only H H will ratio against X Xp Also H is parallel to X X and H is parallel to X X All ratio measurements are made between parallel windings The phase polarity must also be observed and is designated by the order of terminal mention i e H is of the same phase polarity as X Xp Note that the phase displacement for Figure 5 10 a diagram is 30 and has an IEC vector group coding of Dyn1 Refer to the notes to Tables 5 4 through 5 6 for an explanation of vector group coding For phase displacement between windings the ve
27. warranty The warranty is void in the event of abuse failure to follow recommended operating procedures or failure by the customer to perform specific maintenance as indicated in this manual TABLE OF CONTENTS RW FF plc DD fpes t DN dd ADY 1 Keene Instr eHons ve 1 Ferrer Pee 1 EET eee 3 PETTER 7 IST a a ua sa ua ap aa upa a ah 7 Environimetital Conditions s a R ON Jes Seeds a GN GAD la GA 10 Physical Dataus s sanan aap a a Saa De Hn Ae AF 10 AC Ges SO GSG HD pe verse ama qu waka a eb ads 10 Optional AC CSS Vasa 11 Optional Upgrade Kites Ur e i CH ra ee ere 12 4 DESCRIPTION i Y FD FF eara n REOT SER 15 S Se Ta ST Te latin ele deri debe bi rei debe aspa RR ee 13 LTRS Operational Plow Gato secius bait us pastu iuba Es P RN pe E ST ug 15 Controls Indicators C ontnectofs u s quan eive heec tbid 19 DIJSETUP AND CONNECTIONS gen 21 General Ms UCU ig e Y rq a end pe EN Y MER qamya SN au EAN Vee a ydus 21 Single Phase Two Winding Transformets ten aie ie ended e b Pd e PR dea e WYAU 21 Three Phase Two Winding Transformets rv eei qe divi fei tiw bg Ae rap d 24 Three Phase Three Winding Transformets dradd 26 TT pe TransformietS ioiei y aq d qo DA Ce rt a O CF 33 o OPERATION us proli atu Y nd GN FY FR Fe DY YF AF foi A i 67 Gene
28. x Open Test Date 06 18 2007 14 27 02 06 18 2007 14 26 28 New Delete on In Close AVTMTTR310 Rev B Sept 2008 102 PowerDB Lite 8 Loading Data Files When testing with the TTR 320 or TTR 330 you may load files saved on the instrument s USB drive Refer to Step 7 for instructions on selecting and opening files 9 Setting the Logos a Select the Tools gt Options menu item b The Logos section specifies paths to the left and right logos files to use c To change the left logo press the button by the left logo path d The Open screen allows you to browse to a file location select a JPG or BMP file and press the Open button e Repeat steps c and d for the right logo path f Note that a logo will not be shown if the logo file path is blank or the file does not exist g Note after specifying the logo files the image will not be shown until the next time a form is opened File gt Open or the File gt New menu items h Note that the logos will look the best if the resolution of the file is pixels wide by 240 pixels high DPI is not important Options Language ntemationalE nalish Measurements Default Units Metric v Temperature Units C Logos Left C Program Files PowerDB Inc PowerDB powerdb megger slug m Right C Program Files PowerDB Inc PowerDB your company logo br AVTMTTR310 Rev B Sept 2008 a 103
29. 10000 CALCULATED TURNS RATIO 1 0000 TEST VOLTAGE 8V RATIO 1 0013 DEVIATION 0 13 PHASE min 14 7 Texc ma 0 03 Figure 6 166 Sample Single Phase Test Report AVTMTTR310 Rev B Sept 2008 90 TEST 003 RATIO Texc ma DEVIATION PHASE min DATE M D Y 06 01 1999 1 25 TRANSFORMER ID CHQ12 5899D TYPE THREE PHASE TRANSFORMER Dd6 TAPS TESTED 3 16L H VOLTAGE 250000 X VOLTAGE 50000 CALCULATED TURNS RATIO 5 0000 TEST VOLTAGE 80V A 5 006 0 12 5 3 8 5 B 4 998 0 04 6 5 9 1 5 011 0 22 7 9 7 6 Figure 6 16c Sample Three Phase Test Report OPERATION AVTMTTR310 Rev B Sept 2008 91 Megger Use with the Optional Inverter The TTR310 may be used with the optional inverter This feature is important when the mains is not accessible or it is not reliable the voltage variations are too high too noisy or frequency changes are not acceptable In this case the optional inverter XP 125 may be used as a reliable source of true sine wave power supply The XP 125 inverter provides both 120 V ac and 230 V ac at frequency 50 Hz or 60 Hz The XP 125 uses a car battery as a source of input power See Section 8 for ordering information To operate simply plug the cigarette lighter adaptor in and plug in the TTR310 test set Keep your vehicle running when operating the inverter The XP 125 inverter will source up to 125 W load To maximize the performance of the inverter
30. 1999 Megger Neutral accessible on wye winding H2 B Neutral accessible on wye winding A B C Neutral A accessible B on wye C winding A B e a C AVTMTTR310 Rev B Sept 2008 47 Megger Notes to Table 5 5 Transformer terminal markings for power transformers marked in accordance with requirements of International Standard CEI IEC 76 1 1993 Definition of Symbol Designations 1U 1V 1W 2U 2V 2W 1N 2N U V W 5 gt External terminals on HV transformer winding alternate notation U V W External terminals on LV transformer winding alternate notation u v w External neutral terminal on HV transformer winding alternate notation N External neutral terminal on LV transformer winding alternate notation n Inaccessible neutral point on HV or LV transformer winding Nameplate voltage rating line to line of HV transformer winding Nameplate voltage rating line to line of LV transformer winding Phase tested IEC Vector Group Coding The letters indicate the three phase winding connections D Y and Z designate the HV side winding d y and z designate the LV side winding D and d represent a delta connection Y and y represent a wye connection and Z and z represent a zigzag connection N and n indicate that the neutral point of a star or zigzag connected winding is accessible on the respective HV or LV side winding The number indicates the phase displacem
31. 1V 1W 1V 1W 1U 1W 1U 1V 1U 1V 1W 1V 1W 1U 1W 1U 1V No neutral accessible on HV amp LV winding With or without accessible neutral on wye winding No neutral accessible on HV amp LV windings Neutral accessible on wye winding No neutral accessible on HV amp LV windings AVTMTTR310 Rev B Sept 2008 56 Table 5 5 Copyright 1999 Megger Diag Vector No High Voltage Winding U1 1U SETUP AND CONNECTIONS CEI IEC 76 1 1993 Transformer Winding Phase Relationship Winding Connection Low Voltage Winding U2 Phase Tested Winding Shorted By TTR Winding Tested High Voltage Winding 1U 1V 1W 1V 1W 1U 1W 1U 1V 1U 1V 1W IV 1W 1U 1W 1U 1V Low Voltage Winding Measured Turn Ratio Remarks With or without accessible neutral on wye winding No neutral accessible on HV amp LV windings Neutral accessible on wye winding No neutral accessible on wye winding Neutral accessible on wye winding AVTMTTR310 Rev B Sept 2008 57 Megger Table 5 5 Copyright 1999 Megger CEI IEC 76 1 1993 Transformer Winding Phase Relationship Winding Connection Diag Vector No High Voltage Winding U1 10 Low Voltage Winding U2 Phase Tested Winding Shorted By TTR High Voltage Winding 1U 1V 1W 1V 1W 1U 1W 1U 1V 1U 1V 1W 1V 1W 1U 1W 1U 1V 1U 1V 1W 1V 1W 1U 1W
32. 1W t accessible 1V 1W 1U on zigzag 1W 1U 1V winding No neutral accessible on zigzag winding Neutral accessible on HV amp LV winding U V W U V W U V W U V Ww U V W U V No neutral accessible on LV winding No neutral accessible on HV winding No neutral accessible on HV amp LV windings 54 AVTMTTR310 Rev B Sept 2008 SETUP AND CONNECTIONS Table 5 5 CEI IEC 76 1 1993 Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding High Low Diag Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured No Tested Winding U1 Winding U2 By TTR Winding Winding Turn Ratio Remarks Neutral accessible on HV amp LV windings 2N 2U 2N 2V 2N 2W 10 33 AVTMTTR310 Rev B Sept 2008 2U No neutral 2V accessible 2W u on LV winding 2V 2U 2W 2V No neutral accessible on HV winding 2U 2W 2V 2U No neutral 2W 2V accessible 2U 2W on HV amp LV windings With or 2U 2N 228 without 2V 2N accessible 2W 2N neutral on wye winding 55 Megger Table 5 5 Copyright 1999 Megger CEI IEC 76 1 1993 Transformer Winding Phase Relationship Winding Connection Winding High Low Diag Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured No Winding U1 Winding U2 Tested Winding Turn Ratio Remarks 10 38 1U 1V 1W 1V 1W 1U 1W 1U 1V 1U
33. 4 4 H NAMEPLATE VOLTAGE L D 5 NO OF H TAPS 6 NOMINAL VOLTAGE H TAP NO 7 HIGH VOLTAGE H TAP NO 8 DIFFERENCE TAP 9 MAIN MENU OPERATION This selection is used to enter the nameplate high voltage H rating of the transformer to be tested L L stands for line to line The transformer under test nameplate high voltage is used to calculate the transformer turn ratio when test winding 7 H X or 8 H Y is selected on the Main Menu screen see Figure 6 2 When test winding 9 CT is selected on the Main Menu screen see Figure 6 2 entry 4 H NAMEPLATE VOLTAGE L L is replaced by 4 PRIMARY CURRENT A and selections 5 6 7 8 of the FULL TEST SETUP 1 screen will go off In this case selection 4 PRIMARY CURRENT A is used to enter the nameplate primary current of a current transformer tested This selection is used to enter the number of taps on the high side H of the transformer to be tested If the high side winding does not have any taps enter 0 selections 6 7 and 8 will go off This selection is used to enter the tap number of the nominal voltage of the high side H of the transformer This selection is used to enter the tap number of the highest input voltage of the transformer This selection is used to enter the high voltage difference in percent per tap Use the following formula to calculate this parameter V Kua H max H min x 100 y Hnameplate n Where n number of H taps
34. 6 Full Test Setup 3 78 Language 85 Main menu 69 Main Menu Screen After Selection of a Custom Transformer Setting 83 Opening Display 68 Phase A Rest Result 81 Quick Test Result Final 73 Quick Test Result Initial 72 Quick Test Setup 71 Recall or Save Custom Settings 87 Saved Data 86 System Setup 84 Transformer Test Result 80 SERVICE 116 SETUP AND CONNECTIONS 21 SPECIFICATIONS 7 Electrical 7 Environmental Conditions 10 SYSTEM SETUP SCREEN 84 T TAP FORMULA DIFFERENCE TAP 75 77 TEST LEAD MARKINGS Single phase Transformers 23 Three phase Transformers 25 TRANSFORMER TEST RESULT SCREENS 80 TRANSFORMER WINDING PHASE RELATIONSHIP ANSI 39 Australian Standard 2374 Part 4 1982 61 CEI IEC 76 1 1993 48 50 T type 33 TROUBLESHOOTING 115 TROUBLESHOOTING GUIDE 115 TTR BUTTON IV T TYPE TRANSFORMERS 33 U USE WITH THE OPTIONAL INVERTER 92 USE WITH THE OPTIONAL PRINTER 90 V VECTOR VOLTAGE DIAGRAMS 34 VOLTAGE REGULATORS SETUP FOR TESTING 23 24 AVTMTTR310 Rev B Sept 2008 121 Megger W WARNING 21 25 26 27 111 114 WEIGHT 10 AVTMTTR310 Rev B Sept 2008 122
35. AVTMTTR310 Rev B September 2008 Instruction Manual AVTMTTR310 for Three Phase TTR Transformer Turn Ratio Test Set Catalog No TTR310 TTR310 47 High Voltage Equipment Read the entire manual before operating Aparato de Alto Voltaje Antes de operar este producto lea este manual enteramente Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown PA 19403 U S A 610 676 8500 www megger com Three Phase TTR 310 Transformer Turn Ratio Test Set Instruction Manual Copyright Notice Copyright 1999 by Megger All rights reserved Disclaimer Notice The information contained in this manual is believed to be adequate for the intended use of the product If the product or its individual instrument are used for purposes other than those specified herein confirmation of their validity and suitability must be obtained from Megger Refer to the warranty information included at the end of this instruction manual Specifications are subject to change without notice Warranty Products supplied by Megger are warranted against defects in material and workmanship for a period of one year following shipment Our liability is specifically limited to replacing or repairing at our option defective equipment Equipment returned to the factory must be shipped prepaid and insured This warranty does not include batteries lamps or other expendable items where the original manufacturer s warranty shall apply We make no other
36. B http www powerdb com about View all forms shipped with PowerDB http www powerdb com forms For technical support call 1 800 723 2861 3519 c The TTR 300 310 only uses serial communicate so never check Use Ethernet if you are using a TTR 300 or TTR 310 Select the appropriate communication settings on the Serial Device Configuration screen Use the Refresh button to find any ports that may have not been connected at the startup of PowerDB Lite If you are using a USB serial port and do not know the port assigned to it please perform the following 1 2 Remove the USB serial adapter Press Refresh Click on the port drop down and record the options Plug the adapter back in Press refresh AVTMTTR310 Rev B Sept 2008 97 Megger 6 Select the port that was not in the original list Verify that the baud rate is set to 9600 Parity is set to none Byte Size is set to 8 and Stop Bits is set to 1 d Only check Use Ethernet if connected to the TTR330 If you leave the IP address blank PowerDB Lite will discover the unit If you have problems with the discovery enter the IP address which is displayed on the instrument s Preferences screen Serial Device Configuration Instrument Use Transformer Tums Raio Manufacturer AW A Meger Model Type Series rr Supported Models 3 Phase TTR Serial Port v Refresh Byte Size 8 v Baud Rate 3600 v Parity None Stop Bits 1 U
37. BUSHING NAMEPLATE s NO WERE DSG SERIALNUM TYPE CLASS kv AMPS YEAR Ratio Mult EIGHT B TEM BIL CLASS PHASES COOLANT Diagram 36 REASON Test Voltage V OIL VOLUME Off Load Pn ESSE EE ES TE First Tap Voltage HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS LastTap Voltage Number Of Tests 5 4 AVTMTTR310 Rev B Sept 2008 a 109 Megger AVTMTTR310 Rev B Sept 2008 110 8 Service Maintenance Maintenance should be performed only by qualified persons familiar with the hazards involved with high voltage test equipment Read and understand Section 2 Safety before performing any service The TTR310 test set is sturdily constructed and requires no periodic maintenance Routine maintenance is all that is required for the TTR310 test sets Inspect the cable assemblies occasionally to ensure they are in good condition The appearance of the TTR310 test set can be maintained by occasionally cleaning the case panel and cable assemblies Clean the outside of the carrying case with detergent and water Dry with a clean dry cloth Clean the control panel with a cloth dampened with detergent and water Do not allow water to penetrate panel holes because damage to components on the underside may result An all purpose household spray cleaner can be used to clean the panel Polish with a soft dry cloth taking care not to scratch the display screen cover Clean t
38. D A13579CV0246 DIAG NN Ddnnn TEST VOLTAGE 80V A RATIO PHASE min lexc mA TEST IN PROGRESS PRESS EMERGENCY TEST OFF BUTTON TO STOP TEST Figure 6 4 Initial Quick Test Result Screen The TEST IN PROGRESS message indicates that the TTR310 test set is performing a test The test may be interrupted by pressing the EMERGENCY TEST OFF button located on the front panel When pressed the EMERGENCY TEST OFF switch is locked in the off position To reset the switch twist the button in the direction indicated by the arrows When the test 1s completed the final quick test result screen shown in Figure 6 5 appeats If abnormal operating conditions occur during testing phase B or C of a three phase transformer an error message refer to Error Messages section will appear on the bottom of the screen followed by the message PRESS ANY KEY TO CONTINUE In this case if any key is pressed the following message will appear on the bottom of the screen Select 1 REPEAT TEST 2 CONTINUE 3 ABORT TEST If REPEAT TEST is selected the test set will re test phase B or C If CONTINUE is selected the test set will start testing of phase C if an error message appeared during phase B testing If ABORT TEST is selected the Main Menu screen will appear If one of these error messages appears verify the abnormal condition by taking a repeat measurement before attempting to take any corrective action If an error message appears
39. EAD XI L H3 LEAD X3 LEAD HO LEAD 2 2 OR Q XO 1 x3 2 JUMPER LEADS TYP BCT TEST SELECTION WINDING STANDARD TABLE NO DIAGRAM NO IEC VECTOR CODE ANSI 5 4 19 YNyO CEI IEC 5 5 30 YNyO AUSTRAL I AN 5 6 14 YNyO PHASE A TEST MEASURES BCT ON H1 POWER TRANSFORMER TERMINAL BCT A PHASE B TEST MEASURES BCT ON H2 POWER TRANSFORMER TERMINAL BCT B PHASE C TEST MEASURES BCT ON H3 POWER TRANSFORMER TERMINAL BCT C Figure 5 8 Setup for Testing BCT Mounted on Delta Winding on a Three Phase Power Transformer AVTMTTR310 Rev B Sept 2008 31 Megger H2 H2 OR S HO H1 H3 JUMPER LEADS H3 TYP H1 LEAD HO LEAD H2 LEAD H3 LEAD X2 XO JUMPER POLARITY MARKER Oc y X1 LEAD XO LEAD X3 LEAD X2 LEAD BCT TEST SELECTION WINDING STANDARD TABLE NO DIAGRAM NO IEC VECTOR CODE ANS I 5 4 7 YNynO 5 5 29 YNynO AUSTRAL AN 5 6 13 YNynO PHASE A TEST MEASURES BCT ON X1 POWER TRANSFORMER TERMINAL BCT A PHASE B TEST MEASURES BCT ON X2 POWER TRANSFORMER TERMINAL BCT B PHASE C TEST MEASURES BCT ON X3 POWER TRANSFORMER TERMINAL BCT C Figure 5 9 Setup for Testing BCT Mounted on Wye Winding of a Three Phase Transformer AVTMTTR310 Rev B Sept 2008 32 SETUP AND CONNECTIONS T Type Transformers T type transformers represent the special type of thee phase transformers This
40. Megger H1 LEAD H2 LEAD POLAR I TY DOT X2 H2 ear X2 LEAD BUS OR USE HEAVY GAUGE LEAD WIRE LEAD NOTE TEST PER DIAGRAM NG 1 F R ANSI CE I IEC amp AUSTRALIAN STANDARDS Figure 5 5 Setup for Testing Unmounted Current Transformer Figure 5 6 shows the setup for testing the taps on a multiple tap CT H1 LEAD XI X2 H1 O X3 H2 X4 X5 TRANSFORMER NOTE TEST PER DIAGRAM NO 1 FOR ANSI CEIZIEC amp AUSTRALIAN STANDARDS Figure 5 6 Setup for Testing Taps on Multiple Tap CT AVTMTTR310 Rev B Sept 2008 28 SETUP AND CONNECTIONS Bushing Current Transformer BCT Mounted on Single Phase Two Winding Transformer A turn ratio test can be performed on a BCT after it has been mounted on a citcuit breaker or power transformer entrance bushing The test can be performed without removal of the BCT from the equipment Proceed as follows and as shown in Figure 5 7 4 Connect the wing nut ground terminal of the test set to a low impedance earth ground using the 15 ft 4 6 m ground cable supplied Use the TTR310 two or four conductor H and X test leads Short circuit the winding on the opposite voltage side of the power transformer core using jumper leads Connect the heavy duty clips marked H1 and H2 of the test leads to the respective X1 and X2 terminals of the BCT Connect the heavy duty clip marked X1 to the power transformer terminal on which t
41. Megger Winding Tested IEC indi Low Diag Vector High Voltage Low Voltage Voltage Voltage Measured No Group Winding HV Winding LV Winding Winding Turn Remarks Ratio A520 O 020 O a 10 Single phase transformer A50 O q10 O a5 10 Single phase transformer 2 Neutral accessible on wye winding No neutral accessible on wye winding Neutral accessible on wye winding AVTMTTR310 Rev B Sept 2008 61 Table 5 6 Transformer Winding Phase Relationship Australian Std 2374 Part 4 1982 Copyright 1999 Megger IEC High Low Phase Voltage Voltage Measured Tested Winding Winding Turn Remarks Ratio Vector High Voltage Low Voltage Winding HV Winding LV No neutral accessible on wye winding Neutral accessible on zigzag winding No neutral accessible on zigzag winding Neutral Bot Cz 3 accessible Bo C2 A on zigzag C2 A2 B2 winding No neutral accessible on zigzag winding Neutral accessible on HV amp LV windings AVTMTTR310 Rev B Sept 2008 62 Table 5 6 Copyright 1999 Megger IEC Vector P Group hase Shorted Tested By TTR Low Voltage Winding LV High Voltage Winding HV B C N A2 N B N a gt A B 2 2 b2 a2 A B n C Bo C2 bo a2 A B C Bo C2 b2 by cq n A B C Bo 84 bi cq A B C B2 ed bi cq n B C Bo a1 A2 N C2 A2
42. ON lamp does not light on start of testing One of the following messages appear on the test result screen CHECK CONNECTIONS PHASE A or B or EXCITATION CURRENT TOO HIGH TURNS RATIO TOO LOW 0 8 ot PHASE A or B or C TURNS RATIO TOO HIGH CHECK PHASE A ot B or C CONNECTIONS REVERSED CHECK PHASE A ot B or C POLARITY RATIO and or Iexc mA readings erratic Cannot obtain printout when printer is connected Troubleshooting Guide POSSIBLE CAUSE No service power Defective line cord Defective fuse s CONTRAST potentiometer not adjusted Defective display or electronics Out of tolerance condition s in measurement citcuit Defective lamp EMERGENCY TEST OFF switch is not released Problem in measuring circuit Abnormal operating condition Incorrect setting of TRANSFORMER TYPE in the quick test setup or the full test setup 1 menus Incorrect connection of leads Defective test leads Incorrect marking of a transformer Problem in test specimen Problem in measuring circuit Defective test leads open circuit poor connection Severe abnormal transient in service power Problem in test specimen poor connection Problem in measuring circuit Printer power not turned on Printer battery discharged Problem in measuring circuitry AVTMTTR310 Rev B Sept 2008 115 Megger Repair Megger offers a complete repair an
43. al photographic or otherwise nor be released to any third party without the express written consent of Megger Megger Software End User License Agreement NOTICE TO USER THIS IS A CONTRACT BY INSTALLING USING THIS PRODUCT YOU ACCEPT ALL TERMS AND CONDITIONS OF THIS AGREEMENT If you do not agree with the terms and conditions of this Agreement return the software unused along with the rest of the package to Megger This package contains software and related explanatory written materials The term Software shall also include any upgrades modified versions updates additions and copies of the Software licensed to you by Megger Megger grants you a nonexclusive license to use the Software and Documentation provided you agree to the following Use of the Software You may Install the software on any computer within your company Make one backup copy of the Software Copyright The Software is owned by Megger and its structure organization and code are the valuable trade secrets of Megger The Software is also protected by United States Copyright Law and International Treaty provisions You must treat the Software just as you would any other copyrighted material such as a book You may not copy the Software or the Documentation except as set forth in the Use of the Software section Any copies that you are permitted to make pursuant to this Agreement must contain the same copyright and other proprietary notices that appear on o
44. anger A selector switch device used to change transformer taps with the transformer energized and carrying full load An insulated stick sometimes called a hot stick with a hook type electrode connected to ground via an insulated cable In some discharge sticks a resistor is connected between the electrode and the ground cable Both are used to discharge capacitive specimens by providing a low impedance path to ground They must be suitable rated for the voltage and capacitance of the specimen to be discharged A change in the steady state condition of voltage or current or both Transformer turn ratio a registered trademark of Megget The ratio of the number of turns in a higher voltage winding to that in a lower voltage winding AVTMTTR310 Rev B Sept 2008 117 Megger AVTMTTR310 Rev B Sept 2008 118 INDEX A ACCESSORIES Optional 11 Supplied 12 ANSI TRANSFORMER WINDING PHASE RELATIONSHIP 39 AUSTRALIAN TRANSFORMER WINDING PHASE RELATIONSHIP 61 AUTOTRANSFORMER SETUP FOR TESTING 22 B BCT SETUP FOR TESTING Single phase Transformer 29 Three phase transformers 30 BLOCK DIAGRAM Three phase TTR Test set 14 C CALIBRATION 112 CAUTION 27 CEI IEC 76 1 1993 TRANSFORMER WINDING PHASE RELATIONSHIP 50 CONNECTIONS Current Transformers 27 Single phase 21 Three phase Transformers Two Windings 24 Three phase Transformers Three Winding 26 CONNECTIONS AND VECTOR VOLTAGE DIAGRAMS 34 CONNECTORS
45. ates the Need to Install and Maintain a Software Application per Instrument Eliminates All Hand Written Test Sheets Create Your Own Test Forms Use or Modify One of Our 200 Built in Test Forms One Step Procedure To Generate Test Reports With Table of Contents and Deficiency Summaries Allows All Of Your Field Test Data To Be Integrated With CMMS Systems Such As Maximo or SAP Imports gt From Many Other Industry Standard Software Applications Controls and Imports Data From Many non Megger Instruments AVTMTTR310 Rev B Sept 2008 94 PowerDB Lite Software Installation To install PowerDB Lite load the PowerDB Lite CD into your CD ROM drive and follow the on screen instructions 5 Accept the terms of the License agreement License Agreement Please read the following license agreement carefully Press the PAGE DOWN key to see the rest of the agreement POWER DB INC SOFTWARE LICENSE AGREEMENT READ THE FOLLOWING TERMS AND CONDITIONS BEFORE INSTALLING THE SOFTWARE IF YOU DO NOT AGREE WITH THEM PROMPTLY RETURN THE SOFTWARE AND THE ACCOMPANYING ITEMS INCLUDING MANUALS TO POWER DB INC 4064 STATE HIGHWAY 6 SOUTH COLLEGE STATION TEXAS 77845 FOR REFUND OF THE PRICE PAID Do you accept all the terms of the preceding License Agreement If you select No the setup will close To install PowerDB you must accept this agreement nstallShield 6 Choose the destination location for the PowerDB
46. be entered to start testing other than the transformer serial number TRANSFOMER ID if desited AVTMTTR310 Rev B Sept 2008 69 Megger 3 RECALL CUSTOM SETTINGS 4 SYSTEM SETUP MENU 5 SAVED DATA MENU 6 PRINT HEADER TEST WINDING This option permits saving up to nine custom transformer settings These saved custom transformer settings may be recalled and used for testing the same or similar type of transformer This menu permits choice of language transformer standard test voltage phase display units and setting of date and time The TTR310 saves up to 200 test results This menu allows these readings to be recalled for viewing and uploading to a PC This option will print out a test report header to the printer if connected Selection 7 8 and 9 allow an operator to choose the windings to be tested Asterisk indicates last selection used See description of the following screens for mote details Test parameters shown on the bottom of the main menu screen are from the last test performed AVTMTTR310 Rev B Sept 2008 70 OPERATION QUICK TEST SETUP Screen Figure 6 3 If 1 QUICK TEST SETUP is selected on the main menu the QUICK TEST SETUP screen Figure 6 3 appears QUICK TEST SETUP 1 TRANSFORMER ID nnnnnnnnnnnn 2 TRANSFORMER TYPE DIAG 01 1ph0 3 START TEST 4 MAIN MENU ENTER SELECTION FROM KEYPAD Figure 6 3 1 TRANSFORMER ID 2 TRANSFORMER TYPE 3START TEST
47. bnormal operating conditions occur during transformer testing the following error messages will appear on the quick test result screen and the transformer test result screen accompanied by three short beeps CHECK CONNECTIONS This message indicates that the transformer is not connected to the test set The message may be caused by poor connection of one of the test leads as well PHASE A or B or C EXCITATION CURRENT TOO HIGH This message indicates that excitation current exceeds 500 mA Excitation current can be reduced by using lower test voltages 40 V or 8 V TURNS RATIO TOO LOW lt 0 8 This message shows that a transformer under test turn ratio is less than 0 8 The TTR310 is not designed to test a transformer turn ratio under 0 8 PHASE A or B or C TURNS RATIO TOO HIGH This message shows that a transformer under test turn ratio is higher than 10 000 if 80 V or 40 V is used or is higher than 4 000 if 8 V is used The message may be caused by poor connection of one of the test leads as well CHECK PHASE A or B or C CONNECTIONS REVERSED This message is caused by incorrect connection of the H and X leads The H and X leads have either been reversed or the test transformer connections or markings do not comply with the requirements of ANSI IEC or the Australian standard The message may be caused by wrong diagram number specified as well AVTMTTR310 Rev B Sept 2008 88 OPERATION CHECK PHASE A
48. connection is identical to Table 5 4 Diagram No 26 except the wye winding has an accessible neutral winding perform test per Diagram 26 Do not connect lead to the wye winding neutral terminal The test results are identical and do not require any corrections Note that on the print out of the results the vector designation and the corresponding diagram will not be EXACT but will be close to the actual transformer configuration AVTMTTR310 Rev B Sept 2008 38 SETUP AND CONNECTIONS Table 5 4 ANSI Transformer Winding Phase Relationship Winding Connection Winding Tested Winding High Low High Voltage Low Voltage Phase Shorted Voltage Voltage Measured Winding H Winding X Tested By TTR Winding Winding Turn Ratio Remarks Copyright 1999 Megger Single phase transformer Single phase transformer Vx VH Vx Vx VH Vx Neutral accessible Ke I Vx winding Vue 43 Vx VH Vx X2 X3 Neutral Xi accessible X3 on wye O O O C O C winding O H2 TR H2 3 LEE H2 H2 3 FA 39 Neutral accessible both wye windings X2 Q G O a o 5 O V b O X2 b a Xo C 2 b Xo q C X1 X3 X2 1 Ae ne A B C A B C A B C A B C A B C AVTMTTR310 Rev B Sept 2008 Megger Table 5 4 Copyright 19990 Megger Winding Connection High Voltage Winding H
49. ctor relating to the HV winding 15 taken as the vector of origin dotted line on delta winding H on wye winding The vector relating to the low voltage wye winding 1s taken as X dotted line on a delta winding and is expressed in counterclockwise rotation of low voltage winding in 30 clock hour figure increments The low voltage winding lag may be from 0 to 330 in steps of 30 The TTR310 test set is capable of measuring the turn ratio of three phase transformers where the windings are rotated or are connected in various phase displacements from standard Figure 5 10 b vector diagram is an example of a typical case where the phase is displaced 150 from that of Figure 5 10 a diagram Vector group coding for this diagram is Dyn5 Figure 5 10 c is an example of a nameplate vector diagram drawn differently from that of Figure 5 5 a Although a corresponding figure cannot be found in Table 5 4 the transformer and its testing is identical to that for Figure 5 10 a Figure 5 10 d vector diagram is an example of a typical wye delta connected transformer winding which has a phase displacement of 210 H is the high voltage winding vector of origin and the dotted line on the delta winding is the low voltage winding reference Vector group coding for this diagram is YNd7 AVTMTTR310 Rev B Sept 2008 35 Megger ORIGIN VECTOR Hi p ORIGIN VECTOR ORIGIN VECTOR H1 NG H3 G H2 B Xo Td Hy
50. cur during testing phase B or C of a three phase transformer an error message refer to Error Messages section will appear on the bottom of the screen followed by the message PRESS ANY KEY TO CONTINUE In this case if any key is pressed the following message will appear on the bottom of the screen AVTMTTR310 Rev B Sept 2008 80 OPERATION Select 1 REPEAT TEST 2 CONTINUE 3 ABORT TEST Ift REPEAT TEST is selected the test set will re test phase B or C If CONTINUE is selected the test set will start testing of phase C if an error message appeared during phase B testing If ABORT TEST is selected the Main Menu screen will appear If one of these etror messages appears verify the abnormal condition by taking a repeat measurement before attempting to take any corrective action If an error message appears during phase A testing and repeat measurement is still bad it is impossible to continue testing of the transformer and troubleshooting procedure should be started by testing each phase of the three phase transformer separately as a single phase transformer THREE PHASE TRANSFORMER TEST TEST nnn ID A13579CV0246 DIAG nn Ddnnn TAPS TESTED 3 16R H VOLTAGE 25000 XVOLTAGE 5000 CALCULATED TURNS RATIO 5 000 TEST VOLTAGE 80V A RATIO 5 102 DEVIATION 2 04 PHASE min 1 2 lexc mA 20 6 SELECT 1 REPEAT TEST 2 CONTINUE Figure 6 10 Phase A Test Result Screen 1 REPEAT TEST This selection allows re
51. d Turn Ratio Remarks Neutral accessible on wye winding No neutral accessible on wye winding Neutral accessible on zigzag winding No neutral accessible on zigzag winding Neutral accessible on zigzag winding No neutral accessible on zigzag winding AVTMTTR310 Rev B Sept 2008 52 SETUP AND CONNECTIONS Table 5 5 CEI IEC 76 1 1993 Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding High Low Diag Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured No Winding U1 Winding U2 Tested By TTR Winding Winding Turn Ratio Remarks 1U 9 1U 1V 1W 1 5U1 21 1V 1W 1U U 1W 1U 1V U1 22 02 Neutral 1U 1V 1W 1 5U1 accessible 23 1V 1W 1U Uu on zigzag 1W 1U 1V winding ut U2 1 5U1 U2 ut U2 Neutral accessible on zigzag winding No neutral accessible on zigzag winding No neutral accessible on zigzag winding Neutral accessible on zigzag winding 1U 1V 1W 1V 1W 1U 1W 1U 1V No neutral accessible on zigzag winding AVTMTTR310 Rev B Sept 2008 53 Megger Table 5 5 CEI IEC 76 1 1993 Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding High Low Diag Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured No Winding U1 Winding U2 Tested By TTR Winding Winding Turn Ratio Remarks 1 Neutral 1U 1V
52. d then select 4 and enter 80 V On the same menu select 6 5 When the Main menu appears select 1 6 When the Quick test setup menu appears select 2 and enter 7 The transformer type entry displays DIAG 07 YNynO AVTMTTR310 Rev B Sept 2008 113 Megger WARNING Do not continue functional test if the QUICK TEST SETUP menu does not display DIAG 07 YNyn0 transformer type Keep the leads which are energized clear of ground and personnel 7 Select 3 START TEST on QUICK TEST SETUP menu 8 The readings for phases A B and C should be RATIO 1 0000 0 0020 PHASE min 0 5 Iexc mA 0 0 to 0 5 If needed perform the test according to steps 1 through 8 for the excitation voltage 40 V and then for the excitation voltage 8 V The readings should be the same as shown in step 8 AVTMTTR310 Rev B Sept 2008 114 Troubleshooting Service The Troubleshooting Guide Table 7 1 is arranged to help you evaluate the reasons for TTR310 test set malfunction The table lists possible test set malfunctions which may be encountered during operation and lists possible causes Electronic circuit repairs should not be attempted in the field Refer to Repair section Refer to Section 8 for a list of spare parts Table 7 1 MALFUNCTION Display stays blank after POWER switch is turned on Error message ANALOG OFFSET VOLTAGE HIGH and or ANALOG GAIN OUT OF TOLERANCE appears after self test is complete Red TEST VOLTAGE
53. d calibration service and recommends that its customers take advantage of this service in the event of equipment malfunction Contact your MEGGER representative for instructions and a return authorization RA number Equipment returned for repair should be shipped prepaid and insured and marked for the attention of the Repair Department Please indicate all pertinent information including problem symptoms and attempted repairs The catalog number and serial number of the test set should also be specified Pack the TTR310 test set including all cables in a carton original shipping carton if available with adequate dunnage in accordance with best commercial practice Seal the carton with waterproof tape Ship to Megger Valley Forge Corporate Center 2621 Van Buren Avenue Nortistown PA 19403 U S A AVTMTTR310 Rev B Sept 2008 116 Glossary N D ANSI BCT CEI IEC Centiradian CT LCD LIC Safety ground stick transient TIR turn ratio Use only in accordance with instruction manual Protective ground earth terminal is the wing nut for connecting the test set to earth ground American National Standards Institute Bushing current transformer The initials of the official French name Commission Electrotechnique Internationale of the International Electrotechnical Commission Phase display option in SYSTEM SETUP screen 1 centiradian 0 573 degrees Current transformer Liquid crystal display Load tap ch
54. d databases to a single master database 3 Can I import PowerDB Lite files into PowerDB Yes You can use the File gt Import menu item in PowerDB to import files from PowerDB Lite AVTMTTR310 Rev B Sept 2008 105 Megger Specific Form Help Instructions Operating Instructions for the Multiple Quick Test Form a Type in the asset ID and then press the Enter key b Use the left and right arrow keys to select the high side winding configuration c Press the Enter or Tab key d Use the left and right arrow keys to select the low side winding configuration e Press the Enter or Tab key f Select the test voltage from the dropdown menu then press Enter or Tab g Type in the high side tap number and press the Enter key h Type in the high side voltage and press the Enter key i Type in the low side tap number and press the Enter key j Type in the low side voltage and press the TEST key F2 or tight click on the blue highlighted fields k Hit the Enter key and repeat for each tap you would like to test PowerDB Lite Transformer Turns Ratio i loj File Edit View Tools Help B l 51 l Logo ASSET ID Select Test Voltage Auto TEST DATE 6 20 2008 Yat H2 Prz Megger ole T XO b A Hs E Press F1 for form operation instructions Low Side N __ Hi H3 X1 X2 H2 H1 X2 X H aaa Voltage Calc Actual 5302 Texc Phase Actual Tap
55. during phase A testing and repeat measurement is still bad it is AVTMTTR310 Rev B Sept 2008 72 OPERATION impossible to continue testine of the transformer and troubleshootine procedure should be started by testing each phase of the three phase transformer separately as a single phase transformer THREE PHASE TRANSFORMER TEST TEST nnn ID A13579CV0246 DIAG nn Ddnnn TEST VOLTAGE 80V RATIO PHASE min lexc MA C 12 287 5 1 2 3 2 9 2 2 SELECT 1 PRINT 2 STORE 3 NEXT TEST 4 REPEAT TEST 5 MAIN MENU Figure 6 5 Final Quick Test Result Screen 1 PRINT 2 STORE 3 NEXT TEST 4 REPEAT TEST 5 MAIN MENU This selection allows the test result to be printed out on an optional printer or uploaded to PC This selection allows the test result to be saved in memory for future viewing and or printing and or uploading to PC When selected the QUICK TEST SETUP screen Figure 6 3 appears You may change connections and continue testing with the same transformer for example with a different tap of the high voltage winding or you may start testing a new transformer This selection allows you to repeat the last test This selection brings back the MAIN MENU screen Figure 6 2 AVTMTTR310 Rev B Sept 2008 73 Megger FULL TEST SETUP 1 Screen Figure 6 6 If 2 FULL TEST SETUP is selected on the main menu the FULL TEST SETUP 1 screen Figure 6 6 appears 1 2 3 4 5 6 7
56. e 6 15 except that the headline will be changed to SAVE CUSTOM SETTINGS RECALL CUSTOM SETTINGS DIAG TYPE H VOLTAGE X VOLTAGE 03 Dd0 250000 20000 12 Dyn5 67000 12000 1 2 3 4 5 6 7 8 9 PREVIOUS MENU ENTER SELECTION FROM KEYPAD Figure 6 15 Recall or Save Custom Settings Screen The following message will be displayed if a selection without data is recalled NO DATA IN SELECTED CUSTOM SETTING PRESS ANY KEY TO CONTINUE The following message will be displayed if your selection to save data already contains data CUSTOM SETTING 1 i e HAS DATA OVERWRITE 0 YES 1 NO Saved data will be overwritten by selecting YES Selecting NO will return you to the SAVE CUSTOM SETTINGS screen AVTMTTR310 Rev B Sept 2008 87 Megger Error Messages When an error message appears in the transformer test result screen indicating an abnormal operating condition verify the condition by taking a repeat measurement before attempting to take any corrective action Also refer to the Troubleshooting section for malfunctions and possible causes Open connections wrong connections open windings shorted windings high resistance windings other abnormal transformer problems or a combination of these may cause a large deviation from normal turn ratio or indicate an unusual message The unusual operating conditions may be caused by an abnormal leakage reactance or capacitive coupling within the transformer windings If a
57. ed to the X terminals on the CT and the X terminals on the test set must be connected to the H terminals on the CT NOTE Dots on the housing of the transformer are commonly used to identify terminals of the same polarity WARNING Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or CT Failure to observe voltage rating of low current X winding may result in damage to the CT CAUTION Never use AUTO mode of operation when testing the current transformers with the rated voltage below 80 V ac Most of the CTs are tested at 8 V ac excitation voltage NOTE Most of the current transformers are tested at 8 V ac excitation voltage Some current transformers with turn ratio of 100 5 and less get saturated at 8V ac They require lower excitation voltage for testing and therefore can not be tested with the Cat No TTR310 Us the TTR100 or TTR25 Unmounted CTs 3 Connect the wing nut ground terminal of the test set to a low impedance earth ground using the 15 ft 4 6 m ground cable supplied Use the TTR310 H and X test leads and connect as follows and as shown in Figure 5 5 Connect the heavy duty clips marked H1 and H2 of the test lead to the respective X1 and X2 terminals of the CT Connect the heavy duty clips marked X1 and X2 of the test lead to the respective H1 and H2 terminals of the CT Ensure correct polarity AVTMTTR310 Rev B Sept 2008 27
58. ent lag of the LV winding with respect to the HV winding in units of 30 For example 0 0 lag 1 30 lag 2 60 lag 6 180 lag 11 330 lag AVTMTTR310 Rev B Sept 2008 48 SETUP AND CONNECTIONS Additional Transformer Winding Identification External terminal markings for three phase power transformers with more than two windings are as follows 3U 3V 3W Third winding if any 4U 4V 4W Fourth winding if any If unable to find a corresponding diagram for a transformer with for example accessible neutral winding but can find the corresponding diagram for the same transformer with no neutral accessible winding follow the test procedure for the transformer with no neutral accessible winding In this case specify the diagram number for the transformer with no neutral accessible winding and do not connect 1N or 2N lead to the neutral As an example if transformer winding connection is identical to Table 5 5 Diagtam No 43 except the wye winding has an accessible neutral winding perform test per Diagram 43 Do not connect 1N lead to the wye winding neutral terminal The test results are identical and do not require any corrections AVTMTTR310 Rev B Sept 2008 49 Megger Table 5 5 CEI IEC 76 1 1993 Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested IEC Winding High Low Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured
59. g terminals of the transformer under test Connect the heavy duty clips marked X1 and X2 of the test lead to the corresponding low voltage winding terminals of the transformer under test Figures 5 1 and 5 2 show test setups for single phase transformers Figures 5 3 and 5 4 show test setups for regulators NOTE When using a three phase cable set connect heavy duty clips marked H1 H2 and X1 X2 to the corresponding terminals of the transformer under test The unused clips should be kept clear of ground and personnel H1 LEAD en LEAD H2 LEAD X2 eem LEAD TRANSFORMER Figure 5 1 Setup for Testing Single Phase Transformer XI LEAD S AUTOTRANSFORMER Figure 5 2 Setup for Testing Single Phase Autotransformer AVTMTTR310 Rev B Sept 2008 22 SETUP AND CONNECTIONS To test windings other than H1 H2 and X1 X2 ensure that the heavy duty clip marked H1 is connected to the lower numbered terminal and H2 to the higher numbered terminal of the high voltage winding Similarly X1 and X2 should be connected to the low voltage winding Test lead markings for the ANSI CEI TEC and Australian standards ate as shown in Table 5 1 Table 5 1 Test Lead Markings for Single Phase Transformers Test Lead Marking Transformer Heavy Duty Clip Test Lead ANSI CEI IEC Australian Terminal Voltage Boot Color Color Ba
60. he BCT is mounted and the X2 heavy duty clip to the terminal on the opposite side of the power transformer winding H2 side of BCT Check to make sure that the BCT is mounted with proper polarity with respect to power transformer entrance bushing and that connection polarities are correct BCT POLARITY MARKER TYP X1 LEAD z H1 LEAD o H2 LEAD JUMPER LEAD X2 LEAD POWER TRANSFORMER NOTE TEST PER DIAGRAM NO 1 FOR ANSI CEI IEC amp AUSTRALIAN STANDARDS Figure 5 7 Setup for Testing BCT Mounted on Single Phase Two Winding Transformer AVTMTTR310 Rev B Sept 2008 29 Megger BCTs Mounted on Three Phase Transformers A turn ratio test can be performed on all three 5 using a single setup Figure 5 8 shows how to make the proper connections when the BCTs are mounted on a typical delta winding and Figure 5 9 when mounted on a typical wye winding 5 Use fout conductor H and X test leads Short circuit all windings on the opposite voltage side of the power transformer core using jumper leads Check to make sure that all BCTs are mounted with proper polarity with respect to the power transformer entrance bushing Ensure that all connection polarities are correct AVTMTTR310 Rev B Sept 2008 30 SETUP AND CONNECTIONS H2 X2 LEAD H2 LEAD iff JUMPER c e He H2 H1 o H3 e X2 X2 X1 JUMPER T EAD H1 L
61. he cables and mating panel receptacles with isopropyl or denatured alcohol applied with a clean cloth Fuse Replacement The electronic circuits in the TTR310 test set are protected by two mains fuses Fuse replacement is indicated if the electronic circuits do not function Refer fuse replacement to qualified personnel To avoid electric shock and fire hazard use only the fuses specified in Section 3 Specifications that are identical in respect to type voltage rating and current rating Note that 2 spare fuses are included with each TTR310 WARNING Before replacing the fuses disconnect the power input plug from the live power source AVTMTTR310 Rev B Sept 2008 111 Megger To replace fuse s proceed as follows 1 Disconnect the power cord from the TTR310 test set 2 Using a small flathead screwdriver carefully pry out the fuse holder of the input power module installed on the right side of the TTR310 test set front panel 3 Remove and properly dispose of spent fuse s 4 Install new fuse s making sure to use the type specified in Section 3 5 Reinstall the fuse holder in its receptacle in the input power module Connect the power cord to the TTR310 test set and to an energized power source If the electronic circuits still do not function properly contact the factory for service Calibration A complete performance and calibration check should be made at least once every year This will ensure that the TTR310 te
62. he high accurate readings of the tested transformer turns ratio The test set measurement approach is based on high impedance input and output transformer voltage monitoring circuits The high impedance of the monitoring circuits is optimized for the accurate transformer turns ratio testing When performing a 3 phase TTR310 functional test the H and X test leads interconnect the input and output monitoring circuits without a transformer being connected Such connection cause an impedance mismatch and as a result of the mismatch the displayed turns ratio reading is not exactly 1 1 as it may be expected A customer should be aware that a functional test is not a real transformer turns ratio test Due to the intrinsic and inevitable impedance mismatching the 3 phase TTR310 functional test readings may be from 0 9980 to 1 0020 The TTR310 functional test readings do not represent its calibration It simply shows that the TTR310 test set circuitry functions properly To check the 3 phase TTR310 calibration a customer should use the Calibration Standards mentioned in Calibration section of the manual To perform a 3 phase TTR310 functional test proceed as follows 1 Turn TTR310 test set power off 2 Connect H1 lead to X1 lead H2 lead to X2 lead H3 lead to X3 lead and HO lead to lead Make sure the leads are properly connected 3 Turn TTR310 test set power on 4 Aftet self test is complete and the main menu screens appear select 4 an
63. hine license USB dongle Calibration device for TTR verification Inverter with 3 ft 0 91 m cigarette adapter cord 12 V dc to 120 V ac 60 Hz 12 V dc to 230 V ac 60 Hz 12 V dc to 120 V ac 50 Hz 12 V dc to 230 V ac 50 Hz Serial portable thermal paper printer 4 strip paper Transit case for instrument leads and accessories SPECIFICATIONS Cat No DB0001 AVTMTTR310 Cat No 37093 37094 37095 30915 532 30915 534 30915 533 30915 535 30915 536 30915 537 37087 DB1001 DB1001S 550555 35271 1 35271 2 35271 3 35271 4 35755 3 37009 AVTMTTR310 Rev B Sept 2008 11 Megger Optional Upgrade kits Item Qty TTR330 Upgrade kit TTR320 Icon Based view TR310 Alphanumeric view TTR300 Black box remote control Cat No 37089 1 37089 2 37089 3 37089 4 AVTMTTR310 Rev B Sept 2008 12 Description Principle of Operation The TTR310 test set provides accurate measurements of transformer input and output voltages and the calculates a transformer turn ratio The TTR310 also measures phase shift between primary and secondary windings of a transformer and transformer excitation current A block diagram of the TTR310 test set is shown in Figure 4 1 The excitation voltage transformer converts the main voltage into the test excitation voltage of a transformer The excitation voltage transformer outputs three test voltages 80 V 40 V and 8 V The transformer under test excitation current
64. hip Winding High Low High Voltage Low Voltage Phase Voltage Voltage Measured Winding H Winding X Tested By TTR Winding Winding Turn Ratio Remarks Copyright 19990 Megger Winding Connection b YNy6 Yy6 X a X2 b 2 Xo C 2 X a X FA H3 G H3 o E H3 C Ha C H3 G H3 H2 B A H H2 B A Hi H2 B H A H H2 B 2 H H2 B H 3 X1 o b X2 Hz Hs Ho H3 H1 Ho No accessible neutral on high voltage winding No accessible neutral both wye windings No accessible neutral on low voltage winding Vi Vx Va Vx Va Vx No VH accessible Vy neutral on lt high voltage winding W Vx Mae s Vx No accessible neutral on both wye windings No accessible neutral on wye winding AVTMTTR310 Rev B Sept 2008 Table 5 4 Copyright 1999 Megger f r Winding Connection IEC Vector High Voltage Winding H Hs H2 Hi H4 Hs Hz Hi H3 Hp H A B C A B C A B C A B C B C Winding Low Voltage Phase Shorted Winding X Tested By TTR H Hs H gt H2 H1 H3 H3 H2 H1 HHH Ha Hi H3 Ha Ho H1 SETUP AND CONNECTIONS ANSI Transformer Winding Phase Relationship Winding Tested High Voltage Winding Low Voltage Winding Measured Turn Ratio Ma Vx 2 No Vu 0 3 accessible V neutral on X w
65. ing transformer To test tertiary winding perform the following setup procedure 2 Connect the wing nut ground terminal of the test set to a low impedance earth ground using the 15 ft 4 6 m ground lead supplied Connect the three phase test cables to the respective H and X receptacles of the test set Make sure that the connectors ate screwed tight to the receptacles Connect the heavy duty clips marked HO H1 H2 and H3 of the test lead to the corresponding high voltage winding terminals of the transformer under test Connect the heavy duty clips marked X0 X1 X2 and X3 of the test lead to the corresponding tertiary low voltage winding terminals YO Y1 Y2 and of the transformer under test WARNING Never interchange connections between the high and low voltage transformer terminals Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or transformer The unused HO and XU terminals should be kept clear of ground and personnel because they could become energized during the test Refer to Table 5 2 for test lead markings With delta connected windings HO or X0 is not used With wye connected windings a neutral connection is normally available AVTMTTR310 Rev B Sept 2008 26 SETUP AND CONNECTIONS Current Transformers CTs Connections to CTs are made backwards compared to power or potential transformers The H terminals on the test set must be connect
66. ir section for instructions If no errors are detected the Main Menu screen Figure 6 2 appeats AVTMTTR310 Rev B Sept 2008 68 OPERATION MAIN MENU Screen Figure 6 2 After a successful self test check the main menu screen Figure 6 2 appeats MAIN MENU DATE M D Y 06 15 1998 14 15 1 QUICK TEST SETUP TEST WINDING 2 FULL TEST SETUP 3 RECALL CUSTOM SETTINGS 4 SYSTEM SETUP MENU 5 SAVED DATA MENU 6 PRINT HEADER TEST 002 ID nnnnnnnnnnnn DIAG 1 01 TEST VOLTAGE AUTO H NAMEPLATE VOLTAGE L L 250000 X NAMEPLATE VOLTAGE L L 50000 ENTER SELECTION FROM KEYPAD Figure 6 2 Main Menu Screen DATE M D Y This line shows the current date and time Date format is month day yeat To change date time select 4 SYSTEM SETUP MENU and then select 2 SET DATE M D Y TIME on the SYSTEM SETUP menu see Figure 6 12 1 QUICK TEST SETUP This setup provides a quick path for transformer testing It requires minimum transformer nameplate information to be entered before testing The test results displayed do not include the calculated ratio and ratio deviation values 2 FULL TEST SETUP This setup requires entering main transformer nameplate information The FULL TEST SETUP is used for obtaining full test information of a transformer This setup may be saved and recalled later for future testing of the same or similar type transformers In this case RECALL CUSTOM SETTINGS no additional information needs to
67. isplay the main parameters of the saved custom settings including the H and X nameplate voltages the diagram number and the test set voltage The ID number will be blank The test number shows the number of the next test to be run MAIN MENU DATE M D Y 06 15 1998 14 15 1 QUICK TEST SETUP TEST WINDING 2 FULL TEST SETUP 3 RECALL CUSTOM SETTINGS 7 H X 4 SYSTEM SETUP MENU 8 H Y 5 SAVED DATA MENU 9CT 6 PRINT HEADER TEST 002 ID nnnnnnnnnnnn DIAG 01 1ph0 TEST VOLTAGE AUTO H NAMEPLATE VOLTAGE L L 250000 X NAMEPLATE VOLTAGE L L 50000 ENTER SELECTION FROM KEYPAD Figure 6 11 The Main Menu Screen After Selection of a Custom Transformer Setting Full Test Setup 1 2 and 3 screens will display the custom transformer setting recalled AVTMTTR310 Rev B Sept 2008 83 Megger SYSTEM SETUP Menu Figure 6 12 When selection 4 SYSTEM SETUP MENU on the MAIN MENU is chosen the SYSTEM SETUP MENU screen appears as shown in Figure 6 12 LANGUAGE ENGLISH SYSTEM SETUP SET DATE M D Y TIME 03 16 1998 11 45 STANDARD ANSI TEST VOLTAGE AUTO PHASE DISPLAY DEGREES MAIN MENU ENTER SELECTION FROM KEYPAD Figure 6 12 SYSTEM SETUP Screen 1 LANGUAGE 2SET DATE TIME 3STANDARD 4 TEST VOLTAGE This selection allows a choice of six languages See Figure 6 13 for LANGUAGE screen This selection is for entering the date and time Year has four digit representation mm dd yyyy This selecti
68. l alerts you to a hazard that may result in equipment damage personal injury or death Carefully read the instructions provided and follow all safety precautions A CAUTION symbol alerts you that the system may not operate as expected if instructions are not followed AVTMTTR310 Rev B Sept 2008 i Introduction Receiving Instructions Check the equipment received against the packing list to ensure that all materials are present Notify Megger of any shortage Telephone 610 676 8500 Examine the instrument for damage received in transit If any damage is discovered file a claim with the carrier at once and notify Megger or its nearest authorized sales representative giving a detailed description of the damage This instrument has been thoroughly tested and inspected to meet rigid specifications before being shipped It is ready for use when set up as indicated in this manual General Information The Three Phase TTR 310 Test Set is fully automatic self checking self calibrating menu dtiven unit The test set measures the turn ratio phase shift and excitation current of power distribution and instrument transformers A 47 suffix added to the catalog number denotes a 230 V input power supply rather than the standard 120 V supply The test set is a portable instrument housed in a sturdy plastic case with lid and carrying strap The inside bottom half of the case is nickel coated A canvas carrying bag is supplied
69. l electric shock hazard There is always the possibility of voltages being induced at these terminals because of proximity to energized high voltage lines or equipment Always disconnect test leads from power equipment before attempting to disconnect them at the test set The ground connection must be the first made and the last removed Any interruption of the grounding connection can create an electric shock hazard This instrument operates from a single phase power source It has a three wire power cord and requires a two pole three terminal live neutral and ground type connector The voltage to ground from the live pole of the power source must be within the following rated operating voltage For Cat No TTR310 120 V 21090 single phase 50 60 2 Hz For Cat No TTR310 47 230 V 10 single phase 50 60 2 Hz The neutral pole must be at ground potential Before making connection to the power source determine that the instrument rating matches the voltage of the power source and has a suitable two pole three terminal grounding type connector The power input plug must be inserted only into a mating receptacle with a ground contact Do not bypass the grounding connection Any interruption of AVTMTTR310 Rev B Sept 2008 3 Megger the grounding connection can create an electric shock hazard Determine that the receptacle is properly wired before inserting the plug For test sets energized with 230 V input the neutral terminal
70. mote control unit pushbutton for a short time then release it The pushbutton lamp extinguishes until the TTR310 is ready for the next test When the current testing is complete the test results are automatically saved the test ID is advanced to the next number the pushbutton lamp lights and the TTR310 test set is ready for the next remote test AVTMTTR310 Rev B Sept 2008 89 Megger Use with the Optional Printer If you are using the optional printer plug the printer cable into the RS232 PRINTER receptacle on the TTR310 test set and turn it on A separate manual is supplied with the printer Refer to it for specific information about how to connect operate and care for the printer Select 6 PRINT HEADER on the main menu to print out a test report header Select 1 PRINT on the final quick test result screen or the three phase transformer test result screen to print out test results A sample printout is shown in Figure 6 16a 6 16b and 6 16c Megger AUTOMATIC TRANSFORMER TURN RATIO TESTER CATALOG NO TTR310 TRANSFORMER TEST REPORT COMPAMY SUBSTATION MANUFACTURER TRANSFORMER RATING kVA MVA AMBIENT TEMPERATURE RELATIVE HUMIDITY TTR S N 9901245 OPERATOR S COMMENTS NOTES Figure 6 16a Sample Test Report Header DATE M D Y 06 01 1999 12 25 TEST 002 TRANSFORMER ID 12A 76M 2 TYPE SINGLE PHASE TRANSFORMER 1ph0 TAPS TESTED 3 17 H VOLTAGE 10000 X VOLTAGE
71. n Figure 6 7 5 MAIN MENU This selection returns you to the MAIN MENU screen Figure 6 2 AVTMTTR310 Rev B Sept 2008 79 Megger Transformer Test Result Screens Figure 6 9 and Figure 6 10 When test is completed with NO pauses between phases chosen selection 7 Figure 6 7 the test results are displayed as in Figure 6 9 Three Phase Transformer Test Results Screen THREE PHASE TRANSFORMER TEST TEST nnn ID A13579CV0246 DIAG nn Ddnnn TAPS TESTED 3 16R HIGH VOLTAGE 25000 XVOLTAGE 5000 CALCULATED TURNS RATIO 5 000 TEST VOLTAGE 80V A B RATIO 5 102 5 015 DEVIATION 2 04 0 24 PHASE min 1 2 2 4 lexc mA SELECT 1 PRINT 2 STORE 3 NEXT TEST 4 REPEAT TEST 5 MAIN MENU Figure 6 9 Three Phase Transformer Test Result Screen 1 PRINT This selection prints out the test results 2STORE This selection stores the test results 3NEXT TEST This selection brings up the FULL TEST SETUP 3 screen Figure 6 8 At this point you may specify another pair of transformer taps to be tested 4 REPEAT TEST This selection repeats the last test If the transformer under test does not have any taps the Main Menu screen appears 5 MAIN MENU This selection displays the MAIN MENU Figure 6 2 When test is completed with pauses between phases selected YES chosen on selection 7 Figure 6 7 the screen shown in Figure 6 10 Phase A Test Result Screen appears after phase A test is complete If abnormal operating conditions oc
72. n 2 Safety WARNING Ensure that the transformer to be tested is completely de energized Check every winding Ensure that all terminals of the transformer are disconnected from line or load at the transformer Connections to ground may be left in place The following setup and connection instructions pertaining to ratio polarity and phase relation assume that the transformer under test connections and terminal markings comply with the requirements of ANSI C57 12 70 1990 American National Standards Terminal Markings and Connections for Distribution and Power Transformers The H test leads of the test set are the exciting high voltage leads 8 V 40 V or 80 V Single Phase Two Winding Transformers WARNING Never interchange connections between the high and low voltage transformer terminals Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or transformer Perform the following setup procedure for single phase two winding transformers Connect the wing nut ground terminal of the test set to a low impedance earth ground using the 15 ft 4 6 m ground lead supplied AVTMTTR310 Rev B Sept 2008 21 Megger Connect the H and X test cables to the respective H and X receptacles of the test set Make sure that the connectors are screwed tight to the receptacles Connect the heavy duty clips marked H1 and H2 of the test lead to the corresponding high voltage windin
73. n Ddnnn 1 HTAP TO BE TESTED 2 X TAP TOBE TESTED 3 START TEST 4 PREVIOUS MENU 5 MAIN MENU 3 3 ENTER SELECTION FROM KEYPAD Figure 6 8 FULL TEST SETUP 3 Screen The test number ID and diagram are shown on the first line Selections 1 and 2 allow you to test any pairs of H and X taps If the transformer under test does not have any taps only selections 3 4 and 5 will be displayed on the screen If 3 START TEST is selected see Figure 6 4 for the next screen displayed The DEVIATION heading will also be shown on the screen 1H TAP TO BE TESTED 2X TAP TO BE TESTED This selection is used to enter the H tap number to be tested when test winding 7 H X or 8 H Y is selected on the Main Menu screen see Figure 6 2 When test winding 9 CT is selected on the Main Menu screen this entry will go off This selection is used to enter the X tap number to be tested when test winding 7 H X is selected on the Main Menu screen see Figure 6 2 When test winding 8 H Y is selected on the Main Menu screen entry 2 X TAP TO BE TESTED is replaced by 2 Y TAP TO BE TESTED When test winding 9 CT is selected on the Main Menu screen see Figure 6 2 this entry will go off AVTMTTR310 Rev B Sept 2008 78 OPERATION 3 START TEST This selection initiates testing of a transformer If selected the screen shown in Figure 6 4 will appear 4 PREVIOUS MENU This selection will return you to the FULL TEST SETUP 2 scree
74. n excellent safety practice Users of equipment should note that high voltage discharges and other sources of strong electric or magnetic field may interfere with the proper functioning of heart pacemakers Persons with heart pacemakers should obtain expert advice on the possible risks before operating this equipment or being close to the equipment during operation AVTMTTR310 Rev B Sept 2008 Megger AVTMTTR310 Rev B Sept 2008 3 Specifications Electrical Input Power Cat No 120 V ac 10 single phase 50 2 Hz or 60 2 Hz TTR310 100 VA EC 1010 1 installation category No 230 V ac 10 single phase 50 2 Hz or 60 2 Hz TTR310 47 100 VA 2 EC 1010 1 installation category Pollution Degree TTR310 is designed for Pollution Degree II Protective Devices Fuses 2 Cat No Type T 250 V 1A IEC 127 designation TTR310 Cat No Type T 250 V 0 5 A IEC 127 designation TTR310 47 High voltage and low voltage measurement circuit shorting relays Heavy duty varistors transient voltage suppressors and gas surge voltage protectors Two spare fuses are included with each TTR310 as spare parts AVTMTTR310 Rev B Sept 2008 7 Megger Output Test Voltage and Current 3 test voltages 80 V rms 40 V rms 8 V rms Current up to 500 mA Test Frequency Same as line frequency Loading of Test Transformer Less than 0 2 VA Measuring Ra
75. nd H1 1U A High Red Red H2 1 V A High Red Yellow X1 2 U Low Black Red X2 2V a Low Black Yellow X1 LEAD SERIES WIND ING RAISE DIRECTION SOURCE C HI LEAD Ea a La qo LOAD 3 TTR SHUNT WINDING COMMON X2 LEAD re Figure 5 3 Setup for Testing Single Phase Type A Straight Design Step Voltage Regulator AVTMTTR310 Rev B Sept 2008 23 Megger LEAD SERIES WINDING SOURCE L w N rm R o LOAD RAISE ES DIRECTION SHUNT WINDING 2 Et X2 LEAD Figure 5 4 Setup for Testing Single Phase Type B Inverted Design Step Voltage Regulator Three Phase Two Winding Transformers Perform the following setup procedure for three phase two winding transformers 1 Connect the wing nut ground terminal of the test set to a low impedance earth ground using the 15 ft 4 6 m ground lead supplied Connect the three phase test cables to the respective H and X receptacles of the test set Make sure that the connectors ate screwed tight to the receptacles Connect the heavy duty clips marked HO H1 H2 and H3 of the test lead to the corresponding high voltage winding terminals of the transformer under test Connect the heavy duty clips marked X0 X1 X2 and X3 of the test lead to the corresponding low voltage winding terminals of the transformer under test AVTMTTR310 Rev B Se
76. nections D Y and Z designate the HV side winding d y and z designate the LV side winding D and d represent a delta connection Y and y represent a wye connection and Z and z represent a zigzag connection N and n indicate that the neutral point of a star or zigzag connected winding is accessible on the respective HV or LV side winding The number indicates the phase displacement lag of the LV winding with respect to the HV winding in units of 30 For example 0 0 lag 1 30 lag 2 60 lag 6 180 lag 11 330 lag AVTMTTR310 Rev B Sept 2008 37 Megger Additional Transformer Winding Identification External terminal markings for three phase power transformers with more than two windings are as follows Y is Xa Xa Third winding if any Zi Z Ziz Fourth winding if any If unable to find a corresponding diagram for a transformer with for example accessible neutral winding but can find the corresponding diagram for the same transformer with no neutral accessible winding follow the test procedure for the transformer with no neutral accessible winding In this case specify the diagram number for the transformer with no neutral accessible winding and do not connect HO or XU lead to the neutral Note that on the print out of the results the vector designation and the corresponding diagram will not be EXACT but will be close to the actual transformer configuration As an example if transformer winding
77. ng markings for power transformers Refer to specification AS 2374 Part 4 1997 for Australian standard tappings and connections for power transformers Table 5 4 shows winding diagrams for standard transformers and nonstandard transformers for power and distribution transformers marked in accordance with the ANSI standard Table 5 5 shows winding diagrams for power transformers marked in accordance with the CEI IEC standard and Table 5 6 shows winding diagrams for power transformers marked in accordance with the Australian standard To make a measurement on a three phase power transformer match the vector diagram from the transformer nameplate to the corresponding winding connection diagram from Table 5 4 through 5 6 then enter the corresponding diagram number column 1 of table in the appropriate setup menu of the instrument The tables show the windings tested for each of the three phases The tables also show the relationship between the measured turn ratio and the actual line to line voltage ratio For the ANSI specification the rated voltage on the high voltage winding is represented by Vx represents rated voltage on the low voltage winding The TTR310 is also capable of measuring the turn ratio on three phase transformers with an inaccessible neutral point In this case the TTR310 automatically shorts an appropriate transformer winding listed in the winding shorted column of the table An inaccessible neutral point on the high
78. nges Turn ratio 80 V ac 0 8 to 45 000 5 digit resolution 40 V ac 0 8 to 25 000 5 digit resolution 8V ac 0 8 to 8 000 5 digit resolution Excitation O to 500 mA 3 digit resolution Current Phase Angle 90 degrees 1 decimal point for the minutes display 2 Deviation decimal point for the degree display 2 decimal points for the centiradian display Accuracy Turn ratio 80 Vac 0 1 0 8 to 2000 0 15 2001 to 4000 0 25 4001 to 10000 0 3 10001 to 45000 40 V ac 0 1 0 8 to 2000 0 15 2001 to 4000 0 3 4001 to 10000 0 35 10001 to 25000 AVTMTTR310 Rev B Sept 2008 SPECIFICATIONS 8V ac 0 1 0 8 to 2000 0 25 2001 to 4000 0 35 4001 to 8000 Excitation 2 of reading 1 digit Current rms Phase Angle 3 minutes Deviation Measurement Method In accordance with ANSI IEEE C57 12 90 Transformer Winding Phase Relationship ANSI C57 12 70 1990 CEI IEC 76 1 1993 and Publication 616 1978 AS 2374 Part 4 1997 Australian Standard Measuring Time 10 to 20 seconds depending on mode of operation and type of transformer Display LCD module 256 x 128 dots This translates to 42 characters by 16 lines Memory Storage Up to 200 test results Up to 9 custom transformer settings AVTMTTR310 Rev B Sept 2008 Megger Interface RS232C Environmental Conditions Operating temperature range Storage temperature range Relative
79. nts LIST OF ILLUSTRATIONS Three Phase TTR310 Test Set Block Diagram au dildo dia yR 14 Quick Test low cafes as ua dud bia vas Cult Y Ub Quaerat etude Ta edes 15 Test Setup with Recall Custom sager Ode 16 SU T METEO as TD rbd bo q LE a i TN FETH O ya u Q ha 17 Saved Data Menu with Print Hede asnan ee 18 Three Phase I LR LU ControliPanek u s a tei tbt bt ed eb ntfi 19 Setup for Testing Single Phase Transformer eoa data tid or bal AF ug 22 Setup for Testing Single Phase Autotransformetr nanan 22 Setup for Testing Single Phase Type A Straight Design Step Voltage Regulatot 23 Setup for Testing Single Phase Type B Inverted Design Step Voltage Regulator 24 Setup f r Testing Unmounted Current Transformer ient ied FO 28 Setup tor Testing Taps on Multiple Tap CT attest statt eda 28 Setup for Testing BCT Mounted on Single Phase Two Winding Transformer 29 Setup for Testing BCT Mounted on Delta Winding on a Three Phase Power Tone 31 Setup for Testing BCT Mounted on Wye Winding of a Three Phase Transformer 32 Winding Connections and Phase Relationship Sd CDd YU 36 pening D SETEE T 68 LT PES 69 Quick Test Setup Screech ie i inai a a a S ACYN Fn 71 Pest Result e 72 Final Quick Test Result Sereen vasre 73 PELLE TEST SETUP TS ne 74 FULETESTSEIUP 76 ETE SE 78 Thtee Pha
80. of the input supply cord white or blue lead must be connected to the neutral pole of the line power source The ground terminal of the input supply cord green or yellow green lead must be connected to the protective ground earth terminal of the line power source The black or brown cord lead is the live hot lead To avoid electric shock hazard operating personnel must not remove the instrument from the case Any repait or component replacement must be performed by qualified service personnel The control circuits of the instrument are protected by two mains circuit fuses These fuses are replaceable by the operator To avoid electric shock and fire hazard use only the fuse specified in Section 3 Specifications that is identical in respect to type voltage rating and current rating Refer to the Fuse Replacement procedure in the Service section WARNING Before replacing the fuses disconnect the power input plug from the live power source Megger has made formal safety reviews of the initial design and any subsequent changes This procedure is followed for all new products and covers areas in addition to those included in applicable standards Regardless of these efforts it is not possible to eliminate all hazards from electrical test equipment For this reason every effort has been made to point out in this instruction manual the proper procedures and precautions to be followed by the user in operating this equipment and to mark the
81. on is for entering the desired transformer standard Three transformer standards are available to select from ANSI IEC or AS Australia Standard This selection is for entering the desired test voltage There are four selections available AUTO the TTR310 will automatically test at the highest allowable excitation voltage 80 V 40 V or 8 V depending on the transformer excitation current measured 80 V the test voltage is 80 Volts 40 V the test voltage is 40 Volts 8 V the test voltage is 8 Volts AVTMTTR310 Rev B Sept 2008 84 OPERATION 5 PHASE DISPLAY This selection allows a choice of the phase display units DEGREES CENTIRADS or NONE If DEGREES is selected any phase test results below 1 degree will be displayed in minutes If CENTIRADS is selected the phase test results will be displayed in centiradians 1 centiradian 0 573 degrees If NONE is selected the phase test results will not be displayed 6 MAIN MENU This selection returns you to the MAIN MENU screen LANGUAGE Screen Figure 6 13 Use this screen to select a language Text on all screens except for the opening display screen will appear in the language chosen LANGUAGE ENGLISH FRANCAISE ESPANOL PORTUGUESA DEUTSCH ITALIANA ENTER SELECTION FROM KEYPAD Figure 6 13 Language Screen AVTMTTR310 Rev B Sept 2008 85 Megger SAVED DATA Screen Figure 6 14 When 5 SAVED DATA MENU is selected on the MAIN
82. ormer settings for faster and easier testing Checking reverse polarity at start of each test External printer records test data External PC or laptop can be connected instead of a printer to transfer test results and to provide full transformer test report Quick test mode provides the fastest testing of a transformer Three excitation test voltages 80 V 40 V and 8 V Testing to ANSI IEC and Australian standards Leads marked to ANSI IEC and Australian standards Choice of six languages Large easy to read LCD shows alphanumeric data Meets the requirements of both the European EMC and Low Voltage Directives Trouble free operation in switchyards under electrostatic and magnetic interference conditions AVTMTTR310 Rev B Sept 2008 Safety The test set and the specimen to which it is connected are a possible source of high voltage electrical energy and all persons making or assisting in tests must use all practical safety precautions to prevent contact with energized parts of the test equipment and related circuits Persons actually engaged in the test must stand clear of all parts of the complete high voltage circuit including all connections unless the test set is de energized and all parts of the test circuit are grounded Persons not directly involved with the work must be kept away from test activities by suitable barriers barricades or warnings Treat all terminals of high voltage power equipment as a potentia
83. p Use the following formula to calculate this parameter V V vum x100 V YNOMINAL x n g 1 Where n number of X taps Vymax Maximum voltage at X winding taps minimum voltage at X winding taps Na AER tp nominal voltage at X winding taps If a nameplate has information on total change of voltage in percent for example 10 from nominal voltage the following formula may be used to calculate the difference per tap Total of voltage change n 1 Where n number of X taps Note The aforementioned calculations are true only if a transformer has the same voltage change per tap For this selection there are two choices NO or YES If NO is chosen the TTR310 will test all three windings and display the test results as shown in Figure 6 9 THREE PHASE TRANSFORMER TEST result screen If YES is chosen the TTR310 will test the first phase of a transformer and display the test results as shown in Figure 6 10 Phase A Test Result Screen This selection allows to save up to nine custom transformer settings See Figure 6 15 Recall or Save Custom Transformer Settings Screen This selection returns you to the FULL TEST SETUP 1 screen Figure 6 6 AVTMTTR310 Rev B Sept 2008 77 Megger FULL TEST SETUP 3 Screen Figure 6 8 If 1 is selected on the FULL TEST SETUP 2 screen the FULL TEST SETUP 3 screen appears Figure 6 8 FULL TEST SETUP 3 TEST nnn ID A13579CV0246 DIAG n
84. peat testing of the same phase last phase tested A B or C Refer to following paragraphs 2 CONTINUE This selection will initiate testing of the next phase Refer to following paragraphs You may repeat testing of the phase select 1 REPEAT or continue testing the transformer select 2 CONTINUE If 2 is selected phase B will be tested After completion of the phase B testing the test result will be displayed next to phase A test results The same two selections 1 REPEAT and 2 CONTINUE are shown on the screen Selection 1 allows repeating of the phase B testing Selection 2 starts the phase C testing AVTMTTR310 Rev B Sept 2008 81 Megger After completion of the phase C testing the test result will be displayed next to phase B test results The same two selections are shown on the screen Selection 1 allows repeating of the phase C testing Selection 2 will bring up the five selections shown in Figure 6 9 If abnormal operating conditions occur during testing a transformer an error message will appear on the screen Refer to Error Messages section If one of these messages appears verify the abnormal condition by taking a repeat measurement before attempting to take any corrective action AVTMTTR310 Rev B Sept 2008 82 OPERATION Main Menu Screen When a Custom Transformer Setting Recalled Figure 6 11 After selection of a custom transformer setting the MAIN MENU will appear as shown in Figure 6 11 It will d
85. pt 2008 24 SETUP AND CONNECTIONS WARNING Never interchange connections between the high and low voltage transformer terminals Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or transformer The unused HO and XU terminals should be kept clear of ground and personnel because they could become energized during the test Refer to Table 5 2 for test lead markings With delta connected windings HO or X0 is not used With wye connected windings a neutral connection is normally available Table 5 2 Test Lead Markings for Three Phase Transformers Test Lead Marking Transformer Heavy Duty Clip Test Lead ANSI CEI IEC Australian Terminal Voltage Boot Color Color Band HO 1N N Neutral Red White H1 1U AA High Red Red H2 1V B B High Red Yellow H3 1W CC High Red Blue 2N N Neutral Black White X1 2U Low Black Red X2 2V b b b Low Black Yellow X3 2W Gi cC Low Black Blue Note According to Australian standard wye and delta transformer winding connections have a numerical suffix of 1 and 2 The zigzag transformers have a numerical suffix of 4 See Table 5 6 AVTMTTR310 Rev B Sept 2008 25 Megger Three Phase Three Winding Transformers This type of transformers has primary secondary and tertiary windings Primary and secondary windings are tested as a regular three phase two wind
86. r suggest new or modified features Please feel free to call e mail fax or write with any comments or suggestions you may have We can be contacted at the following By Phone 610 676 8500 By Fax 610 676 8610 By Website mww megger com By Mail Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown PA 19403 U S A IMPORTANT Megger periodically provides updates of software See our web site www megoer com to obtain these download updates SEE ALL OF OUR PRODUCTS APPLICATION NOTES FAQ s BY PRODUCT AND LOCAL REP INFORMATION ON THE WEB AT WWW MEZEY COM AUDIENCE This manual is written for technical personnel who are familiar with the various measurements performed by a and have a general understanding of their use and operation Such personnel should also be thoroughly familiar with the hazards associated with the use of this equipment and should have received proper safety training AVTMTTR310 Rev B Sept 2008 i Megger MANUAL CONVENTIONS This manual uses the following conventions Bold indicates emphasis or a heading Arial Bold denotes the use of a screen button i e click the TTR button Ctrl Enter indicates that to perform the function press both keys simultaneously i e Ctrl Enter indicates that you hold down the Control Ctrl key while simultaneously striking the Enter key NOTE is used to set off important information from the rest of the text A WARNING symbo
87. r zigzag connected winding is accessible on the respective HV or LV side winding The number indicates the phase displacement lag of the LV winding with respect to the HV winding in units of 30 For example 0 0 lag 1 30 lag 2 60 lag 6 180 lag 11 330 lag AVTMTTR310 Rev B Sept 2008 59 Megger Additional Transformer Winding Identification External terminal markings for three phase power transformers with more than two windings are as follows 3B 3C Third winding if any 4B 4C Fourth winding if any If unable to find a corresponding diagram for a transformer with for example accessible neutral winding but can find the corresponding diagram for the same transformer with no neutral accessible winding follow the test procedure for the transformer with no neutral accessible winding In this case specify the diagram number for the transformer with no neutral accessible winding and do not connect N or n lead to the neutral As an example if transformer winding connection is identical to Table 5 6 Diagram No 23 except the wye winding has an accessible neutral winding perform test per Diagram 23 Do not connect N lead to the wye winding neutral terminal The test results are identical and do not require any corrections AVTMTTR310 Rev B Sept 2008 60 SETUP AND CONNECTIONS Table 5 6 Transformer Winding Phase Relationship Australian Std 2374 Part 4 1982 Copyright 1999
88. r in the Software You agree not to modify adapt or translate the software You also agree not to reverse engineer decompile disassemble or otherwise attempt to discover the source code of the Software Transfer You may not rent lease sublicense or lend the Software or Documentation You may however transfer all of your rights to use the AVTMTTR310 Rev B Sept 2008 i Megger Software to another person of legal entity provided that you transfer this Agreement the Software including all copies updates and prior versions and all Documentation to such person or entity and that you retain no copies including copies stored on a computer Limited Warranty Megger warrants that the SOFTWARE will perform substantially in accordance with the accompanying written materials for a period of one year from date of receipt Any implied warranties on the SOFTWARE are limited to one year Customer Remedies Megger and its suppliers entire liability and your exclusive remedy shall be at Megger option either a return of the price paid or b repair or replacement of the SOFTWARE that does not meet this Limited Warranty and which is returned to Megger with proof of purchase This Limited Warranty is void if failure of the SOFTWARE has resulted from accident abuse or misapplication Any replacement SOFTWARE will be warranted for the remainder of the original warranty period or thirty 30 days whichever is longer No Other Wa
89. ral Operating Procedure aiii FD FFY tb re di i the e NF Y FF ent 67 Deseription ef Menus and Fest Screens GYF da a bu b FC Fn FAS 67 PHOEN ye yn en gg y tga aia ve cie Pu porius 88 Remote Control Operation for LTC Testyn MA 89 Use with the Optional Printefs nisana dda aa Wah aT h au fou 90 Opel S doe ed OS clu satan O de Bh DO GYDA ADAF 92 AVTMTTR310 Rev B Sept 2008 i Megger 7 TERS300SERIES POWERDB LITE NN 93 Inttoc d HO aa TTT 93 Software sta lati Obl aca e det Md eid RUMP NO GYG eae 95 Usine Poser D Ie usqay e cu peo dott T 97 Frequently Asked Questions FAQ Juveren seere 105 Specific Form Help HistrucHons ade an GA FOE CF9 106 EE dde Aart nd NE N dated Dd Es 111 Mathtenafice uu aT m e D D a ER de ta uae tem a uou 111 i ento ESS 112 SPhise TIRS10 Fest Set Funct Oral pP Pies ie P PEE rr ipte 113 115 T cM ME M M dM ME 116 RE 117 INDEX a S E 119 AVTMTTR310 Rev B Sept 2008 Figure 4 1 Fieure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 5 1 Fieure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Fieure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure 5 10 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Table of Conte
90. ransformer Turns Ratio 191 xl File Edit View Tools Se BAAR Press F1 for form operation instructions TRANSFORMER Arz Megger TURNS RATIO TEST E SUBSTATION POSITION PAGE EQPT LOCATION DATE ASSET ID AMBIENT TEMPERATURE F HUMIDITY JOB EGPT INVENTORY NO TESTED BY zy VOLTAGE RATED I TAPS NOMINAL CHANGER p Secon 7 T 0 866 Round Tap Voltages To Has Tertiary f 1 is First Te V 1 732 Diagram 36 Tap One Is Listed est Voltage First Tap Volage HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS LastTap Voltage Number Of Tests 5 Hy H3 X4 X3 H2 Hy X2 X1 H3 H2 X3 Xo PRIMARY sec HGHSIDE Lowsipe CALC AVTMTTR310 Rev B Sept 2008 108 PowerDB Lite Operating Instructions for the 3PH TTR with TAP Changer Form The procedure for this form is the same as the Simple TTR form The only difference is that it allows the user to enter additional nameplate information PowerDB Lite Transformer Turns Ratio E 15 xl File Edit View Tools Help GLEO Press F1 for form operation instructions 3 B A a i Y Bis Megger TURNS RATIO TEST CJ SUBSTATION POSITION PAGE EQPT LOCATION DATE ASSET ID AMBIENT TEMPERATURE F HUMIDITY JOB EQPT INVENTORY NO TESTED BY NAMEPLATE DATA Has Tertiary Round Tap Voltages To Tap One Is Listed Test Voltage d YEAR _
91. ransformer under test nameplate low voltage is used to calculate the transformer turn ratio When test winding 8 H Y is selected on the Main Menu screen see Figure 6 2 entry 2 X NAMEPLATE VOLTAGE L L is replaced by 2 Y NAMEPLATE VOLTAGE L L In this case this selection is used to enter the tertiary Y nameplate low voltage rating of the transformer to be tested L L stands for line to line When test winding 9 CT is selected on the Main Menu screen see Figure 6 2 entry 2 X NAMEPLATE VOLTAGE L L is replaced by 2 SECONDARY CURRENT A and selections 3 4 5 6 of the FULL TEST SETUP 2 screen will go off In this case selection 2 SECONDARY CURRENT A is used to enter the nameplate secondary current of a current transformer tested AVTMTTR310 Rev B Sept 2008 76 OPERATION 3NO OF X TAPS 4 NOMINAL VOLTAGE X TAP NO 5 HIGH VOLTAGE X TAP NO 6 DIFFERENCE TAP 7 PAUSE BETWEEN PHASES 8 SAVE CUSTOM SETTINGS 9 PREVIOUS MENU This selection is used to enter the number of taps on the low side X of the transformer If the low side winding does not have any taps enter 0 selections 4 5 and 6 will go off This selection is used to enter the tap number of the nominal output voltage of the low side X of the transformer This selection is used to enter the tap number of the highest output voltage of the transformer This selection is used to enter the low voltage difference in percent per ta
92. rence conditioning circuitries isolate a transformer under test from the TTR310 measurement circuitry and provide conditioning of the input and output measurement signals The programmable gain amplifier is used for additional conditioning of the transformer output signals Both the reference A D converter and the range A D converter are used to convert the analog measurement signals to their digital replica The converted output digital signals are applied to the microprocessor The microprocessor orchestrates all steps of the TTR310 test set operation It provides proper sequence of operation gathers and calculates the test results provides interfacing with the display RS232 printer port and the control circuitry The control circuitry interfaces with virtually all function blocks described providing proper control sequence of the TTR310 test set operation AVTMTTR310 Rev B Sept 2008 14 DESCRIPTION TTR310 Operational Flow Chart This flow chart illustrates the sequence of operation in a graphical manner The Startup screen is the first screen that appears when the TTR310 is powered up This is where the self test will be performed and the embedded software version is indicated along with the present date and time The Startup Screen always goes to the Main Menu This is where the user interface commences NOTE See also page 65 for description of operation and menu test screen NOTE Use the KEY on Figure 4 2 to
93. rranties To the maximum extent permitted by applicable law Megger and its suppliers disclaim all other warranties either express or implied including but not limited to implied warranties of merchantability and fitness for a particular purpose with regard to the SOFTWARE the accompanying written materials and any accompanying hardware No Liability for Consequential Damages To the maximum extent permitted by applicable law in no event shall Megger or its suppliers be liable for any damages including without limitation special incidental consequential or indirect damages for personal injury loss of business profits business interruption loss of business information or any other pecuniary loss arising out of the use of or inability to use this product even if Megger has been advised of the possibility of such damages In any case Megger and its suppliers entire liability under any provision of this agreement shall be limited to the amount actually paid by you for the SOFTWARE Megger Technical Support In the event that the PoerDB Lite software appears defective or if you need assistance in the operation of the PoerDB Lite software call the MEGGER SUPPORT DEPT at 610 676 8500 The Megger Support Dept will determine the necessary support to correct the problem AVTMTTR310 Rev B Sept 2008 Proprietary Information Notice CUSTOMER FEEDBACK We listen to our customers very seriously when they express interest in o
94. se Ethernet Cancel e Then Click OK on the Instrument Setup Screen to finish 2 Open a New Form a Select the File gt New menu item or type CTRL N or press the New toolbar button b The forms associated with the detected instrument will be shown in the Select a Form screen c Choose a form by double clicking or by navigating with the arrow keys and pressing the OK key d See Specific Form Help Instructions for further instruction on test steps You can view the Form Help by pressing the F1 key once the form is loaded AVTMTTR310 Rev B Sept 2008 98 PowerDB Lite Select a Form 1 x TRANSFORMERS 1 TTA QUICK TEST 2 TTR MULTIPLE QUICK TESTS 3 TTR MULTIPLE SINGLE PHASE QUICK TESTS 4 SIMPLE 3PH TTR 56365 3PH TTR WITH TAP CHANGER 3 Enter Test Data a Header and nameplate information can be manually typed into a form b Click the Initialize Instrument button yi to initialize the test set c Form fields with automation will now be colored cyan Right clicking these fields will start the test We Ed wew Toos Heb mx Press FT for kum operabonmstructons TRANSFORMER 85 Megger TURNS RATIO TEST L Your www megger som wf SUBSTATION a POSTION FOPT LOCATION ASSETIO TEMPERATURE zz HMOTY Jor INVENTORY NO TESTED BY VOLTAGE TS TAPS NONA L SS PE NIC NEU U Qu T Has 7 Round TapVotsges7o Tap Onela
95. se Transformer Fest Result Screens ei WR ga 80 Poaceae GG GN GO 81 The Main Menu Screen After Selection of a Custom Transformer Setting 83 SVO TEMSE TUP Ses 84 RTT ee 85 SAVED DATA Screen aaa anaq ee RE Ne NAG a a aaa Eu 86 AVTMTTR310 Rev B Sept 2008 iti Megger Figure 6 15 Recall or Save Custom Settings Sv 87 Eic ur 0164 Sample Test Repott Header queda eere GASS PERRO 90 Figure 6 16b Sample Single Phase Test Report save 90 Figure 6 166 Sample Thr e Phase Fest Report oie pivot Y et ebd tbt e tub 91 LIST OF TABLES Table 5 1 Test Lead Markings for Single Phase Transformers esse 23 Table 5 2 Test Lead Markings for Three Phase Transformers aieo busto tpi ed Tae 25 Table 5 3 T type Transformer Winding Phase 33 Table 5 4 ANSI Transformer Winding Phase elaHofishi pledio iA faust teni hidden adapted 39 Table 5 5 CEI IEC 76 1 1993 Transformer Winding Phase Relationship sess 50 Table 5 6 Transformer Winding Phase Relationship Australian Std 2374 Part 4 1982 61 Table 7 1 Tro blesho ting Guide ss a u eta dee a ie RR pudo aa 115 AVTMTTR310 Rev B Sept 2008 IV PROPRIETARY INFORMATION NOTICE This document contains information proprietary to Megger All rights are reserved No part of this document may be reproduced transmitted processed or recorded by any means or form electronic mechanic
96. st set is functioning and calibrated properly over the entire measurement range The 3 phase TTR310 calibration is performed on each new or repaired unit before sending it to a customer There is a special 3 phase TTR310 final calibration procedure which requires a NIST traceable test equipment to be used As a result of such calibration procedure each TTR310 test set may be NIST certified To check the 3 phase TTR310 calibration at a customer site or in the field the Megger Calibration Standard Cat No550055 or equivalent standard should be used To perform a quick simplified calibration check the Megger Calibration Standard CatNo550555 may be used The last standard has eleven switchable turns ratio settings which cover the turns ratio range from 1 1 to 2000 1 Using these Calibration Standards will confirm proper calibration of TTR310 test set AVTMTTR310 Rev B Sept 2008 112 Service 3 Phase TTR310 Test Set Functional Test A customer may want to make sure that the test set is functioning properly before testing a transformer Traditionally for the transformer turns ratio testers a customer performed this test by connecting H1 X1 and H2 X2 test leads The 1 1 turns ratio was expected to be measured Additionally the displayed test results were interpreted as a test set calibration check The 3 phase TTR310 test set is designed and optimized for the transformer turns ratio testing It uses a mixed analog digital technique to provide t
97. the PowerDB software tool that is designed specifically to control and or extract data from Megger instruments The primary difference between PowerDB Lite and PowerDB 15 that PowerDB is designed to work with all manufacturers equipment and has field and office synchronization capabilities PowerDB Lite will present your test data into a professional looking data form that can be sent to a printer or pdf file distiller such as PDF995 PowerDB Lite allows you to use a sub set of the standard PowerDB forms that are appropriate for specific Megger instruments PowerDB Lite detects the instrument and enables the appropriate form s Data can be entered on screen ot captured directly while using the test instrument Completed data forms can be saved as files to your computer Minimum Recommended System Operating System Windows 2000 or later 7 RAM 64 MB RAM minimum 512 MB RAM recommended N Processor 300 MHz Pentium Class processor minimum 1 GHZ or better recommended For information about the features of the full version of PowerDB please visit our website at www powerdb com Get acquainted with the following features by scheduling a live demonstration at info powerdb com Synchronize All of Your Test Records Into a Single Corporate Database Reduce Test Time AVTMTTR310 Rev B Sept 2008 93 Megger Improve Data Integrity Standardize Test Procedures Easily Use Historical Trending for Evaluation of Test Results Elimin
98. transformer may be tested as a single phase transformer In this case the jumpers indicated in Table 5 3 should be applied to the appropriate terminals of the T type transformers The TTR310 measured turn ratio should be compared to the calculated turn ratio indicated in Table 5 3 Table 5 3 T type Transformer Winding Phase Relationship Winding Connection IEC External Phase High Low Vector High Voltage Low Voltage jumpers tested Voltage Voltage Calculated Group Winding H Winding X Winding Winding Turn Ratio Remarks A Hi Hy 1 i X H2 gt A q B B H3 X4 X3 H2 X2 A q B A Xi b B H2 Xo A x b A X3 B H Xi NOTE When testing T type transformer the diagram number 1 should be entered at the Quick Test Setup screen See Figure 6 3 or at the Full Test Setup 1 screen See Figure 6 6 AVTMTTR310 Rev B Sept 2008 33 Megger Connections and Vector Voltage Diagrams When testing three phase transformers it is necessary to understand the phase relationships vector diagrams and winding connection diagrams for these transformers A detailed description of phase relationships vector diagrams and terminal markings is contained in specification ANSI C57 12 70 1990 American National Standard Terminal Markings and Connections for Distribution and Power Transformers Refer to specification CEI IEC 76 1 1993 and Publication 616 1978 for International Standard terminal and tappi
99. ts These summary reports repeat the notations and lists the page number where reported This allows the user to scroll to a particular page to view a reported anomaly For more information on features of PowerDB visit us at our website at www PowerDB com 6 Save the Data a Select the File gt Save menu item or press CTRL S or press the Save toolbar button b The Save As screen will allow you to specify a location and file name for your PowerDB Lite XML file Save in O PowerDB v e File name Save as type PowerDB XML File PdbxXmi v Cancel AVTMTTR310 Rev B Sept 2008 101 Megger 7 Opening an Existing File Select the File gt Open menu item Look in PowerDB amp ct E3 Im File name button Form name 4 SIMPLE 3PH TTR To view or edit a set of results select a test date and press the pen button To remove a set of results select a test date and press the Delete Press the New button to enter another set of test results Files of type PowerDB XML File Pdbml Cancel Open as read only Browse to the file you would like to open Press the Open dialog button d Ifthe file contains multiple test dates select the date that you would like to open for editing or select New to append a new set of results to the file To remove a set of results click on the selected file and press the delete button Open PowerDB XML file
100. up the test set as described An operator who is familiar with the contents of this manual the test setup and the operation of the test set may follow the condensed operating instructions in the lid of the test set EMERGENCY SHUTDOWN Press red EMERGENCY TEST OFF push button or switch power off Description of Menus and Test Screens Data shown on the menus and test screens in Figures 6 1 through 6 16 are for illustrative purposes only The TTR310 test set menus and test screens are operated by using the keypad on the front panel On power up a beep sounds the test set performs a self test check and all hardware and software variables are initialized NOTE See also Figure 4 2 for Operational Flow Chart AVTMTTR310 Rev B Sept 2008 67 Megger Opening Display Screen Figure 6 1 The LCD then displays the opening screen Figure 6 1 and a beep sounds as the test set performs a diagnostic self check of the electronics Megger AUTOMATIC TRANSFORMER TURN RATIO TESTER VERSION 01 01 06 15 98 11 05 SELF TEST IN PROGRESS COPYRIGHT 1998 ALL RIGHTS RESERVED Figure 6 1 Opening Display Screen If any errors are detected one of the following error messages will replace the SELF TEST IN PROGRESS message on the screen and be accompanied by three short beeps ANALOG OFFSET VOLTAGE HIGH ANALOG GAIN OUT OF TOLERANCE If either error message is displayed return the instrument to Megger for repair Refer to Repa
101. ye winding Ma Vx 2 VU V3 Vx VaL Vx 2 Remarks H4 Ha3 H Hz H H5 Ha H2 H No accessible neutral No accessible neutral No accessible neutral on wye winding No accessible neutral AVTMTTR310 Rev B Sept 2008 43 Table 5 4 ANSI Transformer Winding Phase Relationship Winding Connection Phase Winding High Low High Voltage Low Voltage Shorted Voltage Voltage Measured Winding H Winding X ested By TTR Winding Winding Turn Ratio Remarks H3 H Hi H3 Hz Hi H3 H2 Hi H3 H2 H A B C A B C A B C A B C A B C B C Copyright 19990 Megger No accessible neutral on wye winding No accessible neutral No accessible neutral on wye winding H2 H Hs H gt Hz Hi H3 H2 Hi H3 H2 H1 neutral No accessible neutral on wye winding A H Hs H gt No 3 accessible Ha H2 H1 V neutral 44 No accessible Vue Vx Va L3 Vx 2 VH Vx Va Vx 2 Vx s 3 2 AVTMTTR310 Rev B Sept 2008 SETUP AND CONNECTIONS Table 5 4 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection IEC Winding High Low Vector High Voltage Low Voltage Phase Shorted Voltage Voltage Measured Winding H Winding X Tested By TTR Winding Winding Turn Ratio Remarks No accessible neutral on wye winding H Hs

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