AVTMTTR320 TTR320 Manual Rev A Oct 2008
Contents
1. 16 BGIs Mounted on Three Phase Transformers an a EO E 19 TET YDES TS 22 OT 23 POWT UPa HTTP 23 INANIS HIS SEDE SC OD ER NE EE EA 23 HOME Screen Action pend edades pag be via peg Peoria beh pels 23 Remote Control Operation for DIG Tec sess cst tide edidit aptid lee ute d lee 28 utor tt vdd vi una Uta NN Lone roses PUR NULLE 28 Upon completion of TEST Powering down attenti reete D ep eet HR etui bored 29 ES aE Saran silts ud itu sent uet anch cuo efi dt OE 31 KE ae ka e EET 31 eee 31 EE NE EE NE EN er 32 Re 32 Toska eee 34 ee s ute Lu d NER E UD 35 T Replacement Parts List and Optional Accessories sicot etin d i e loa io 37 SES 39 Ta ao or NE ER NE SEER 39 Envitronme tal forlis t bi Oen us 41 Physical ilede aon ace can ctn Fac lur n eR a COR RD 41 Addendum A TTR 300 Series PowerDB Lite User vee 43 AVTMTTR320 EN Rev A Oct 2008 List of Figures TIRI20 Transformer Fom RAGO test iii Fett Top Jer 3 Figure 1 2 User Interface Paneler 4 Fioute 1 5 Communications DOSES quao Een epi a EDR 5 Fisure 14 HOME Action Icons2. eee 5 Figure 1 5 Ui nada ERE 6 Figure 4 1 Setup for Testing Single Phase Fratistorimet sain ciet ce oed de bars eo tu 12 Figure 4 2 Setup for Testing Single Phase AutottalsIormekuepiormon dr aet kledd 12 Figure 4 3 Setup for Testing Single Phase Type A Straight Design Step Voltage Regulator 13 Figure 4 4 Setup for Testing Single Phase Type B Inverted Design Step Voltage Regulator 14 Figure 4 5 Setup for Testing Unmounted Current Transformer uoce nep cinerea o o ede IT Figure 4 6 Setup for Testing Taps on Multiple Tap C T i etit it titer e those qii les 18 Figure 4 7 Setup for Testing BCT Mounted on Single Phase Two Winding Transformer 19 Figure 4 8 Setup for Testing BCT Mounted on Delta Winding Three Phase Power Transformer 20 Figure 4 9 Setup for Testing BCT Mounted on Wye Winding of a Three Phase Transformer 21 Figure 5 1 cCOleared Test ed aei tud ona Ead bh Ga c ee 24 Ligue 5 2 Pile Manager Recall dieu 25 Figure 5 3 Flere 26 Fisure 54 Tap Structure Dente ose bnt enia iri be e be rini oe Ab rc REM ebbe 26 Figure 5 5 Global Settings Preferences Screens addu eode od ie deu ER S 27 List of Tables Table 4 1 Test Lead Markings for Single Phase
3. AVTMTTR320 EN Rev A Oct 2008 11 Megger Connect the H and X test cables to the respective H and X receptacles of the TTR320 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles Connect the heavy duty clamps marked H1 and H2 of the test lead to the corresponding high voltage winding terminals of the transformer under test Figures 4 1 and 4 2 show test setups for single phase transformers Figures 4 3 and 4 4 show test setups for regulators Connect the heavy duty clamps marked X1 and X2 of the test lead to the corresponding low voltage winding terminals of the transformer under test Figures 4 1 and 4 2 show test setups for single phase transformers Figures 4 3 and 4 4 show test setups for regulators On OFF Switch It is only after all of the above connections are safely made and all safety precautions of sections 2 and 3 are satisfied should the On OFF switch be turned to the ON position H1 LEAD X1 LEAD HI X1 X2 TTR T H2 LEAD H2 X2 LEAD TRANSFORMER Figure 4 1 Setup for Testing Single Phase Transformer X2 TTR AUTOTRANSFORMER Figure 4 2 Setup for Testing Single Phase Autotransformer To test windings other than H1 H2 and X1 X2 ensure that the heavy duty clamp marked H1 is connected to the lower numbered terminal and H2 to the AVTMTTR320 EN Rev A Oct 2008 12 Connecting to the Trans
4. AVTMTTR320 EN Rev A Oct 2008 49 Megger d To change the settings of the TTR place the mouse on the form and right click Then select TTR Settings TTRPrefs Settings Show Diag Number Z Standard ANSI Test Voltage 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 IEC 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 fot testing You may choose between Auto 8 40 or 80 4 Running an Automated Test Select the Initialize Instrument button Automated fields should now turn cyan colored Right click on the cyan colored fields gt ET Follow the screen instructions specific to the test AVTMTTR300 Rev A Oct 2008 50 TTR Series PowerDB Lite User Manual 5 Comments and Deficiencies When imported into the full version of PowerDB the comments and deficiencies on each form are used to generate summary reports These summaty reports repeat the notations and lists the page number where reported This allows the user to
5. teta cde beta RU audet t Met 13 Table 4 2 Test Lead Markings for Three Phase ratisfotiniets ics isscseiscariaicaoreredsasveveiarevoussessavievanieavinverens 15 Table 4 3 T type Transformer Winding PhasesRelatiotsbip os ud inan tuno ds onto naan 22 Te Tole ee 34 Table 7 1 Replacement Parts Lists de m ata A Un Conf HE Ep UE 37 AVTMTTR320 EN Rev A Oct 2008 Upon Receipt of Product Prior to operation check for loosened hardware or damage incurred during transit If these conditions are found a safety hazard is likely DO NOT attempt to operate equipment Please contact Megger as soon as possible TTR320 Transformer Turn Ratio test set AVTMTTR320 EN Rev A Oct 2008 iii AVTMTTR320 EN Rev A Oct 2008 1 Getting to know the TTR320 Product Overview The Three Phase TTR Test Set is fully automatic self checking menu driven 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 removable lid and carrying strap The inside lining of case is metal shielded A canvas carrying bag is supplied to hold all accessories The test set can be used to test single phase and three phase transformers both with
6. BAAR TRANSFORMER Megger TURNS RATIO TEST SUBSTATION POSITION PAGE EQPT LOCATION DATE ASSET ID AMBIENT TEMPERATURE F HUMIDITY JOB EGPT INVENTORY NO TESTED BY EIN VOLTAGE Na T 5 NOMINAL CHANGER PRM 5 3 Offload Pa E SECOND TT Round Tap Voltages To Has Tertiary 0 866 1 732 Diagram 36 Tap One Is Listed Test Voltage First o s HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS LastTap Voltage Number Of Tests 5 Hy H3 X3 Hp Hy X H2 X3 X5 PRIMARY CALC Dic ERES TEC ER e e e p e e e p e e tH AVTMTTR300 Rev A Oct 2008 58 TTR Series PowerDB Lite User Manual 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 Bl xl File Edit View Tools Help Mx gt Ba 8 E3 2 Press F1 for form operation instructions 2 TRANSFORMER X Piz Megger TURNS RATIO TEST em Logo SUBSTATION POSITION PAGE EQPT LOCATION DATE ASSET ID AMBIENT TEMPERATURE aE HUMIDITY JOB INVENTORY NO TESTED BY NAMEPLATE DATA Has Tertiary Round Tap Voltages To Tap One Listed Test Votage Pra BUS
7. AVTMTTR320 EN Rev A Oct 2008 55 Megger Specific Form Help Instructions Operating Instructions for the Multiple Quick Test Form 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 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 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 right click on the blue highlighted fields k Hit the Enter key and repeat for each tap you would like to test ES PowerDB Lite Transformer Turns Ratio i nl xl File Edit view Tools Help le 5 51 vat Megger b A Hy Hs Ss Press F1 for form operation instructions ASSET ID Select Test Voltage Auto TEST DATE 6 20 2008 High Side LowSide N Hi Hg Xi Xo Ho Hi Xo Xg W HgHo XgX Y Voltage Voltage Calc Actual RON Texc Phase Actual Phase Actual Phase Tap kv Tap kv Ratio Ratio mA min Ratio Error min Ratio Error min COMMENTS AVTMTTR300 Rev A Oct 2008 56 TTR Series PowerDB Lite Us
8. All Saved files will begin with this prefix User set error limit Ratio Default test signal voltage level Units of Measute setting Transformer type convention Allows Transformer type diagram number to be shown selected on test screen Should be selected when testing Current Trasnformers CTs Select to set Time With updated software on USB flash drive select to install software into TTR320 AVTMTTR320 EN Rev A Oct 2008 27 Megger Remote Control Operation for LTC Testing Use the remote control mode of the TTR for load tap changer LTC testing The remote control mode provides two way communication between the operator and the TTR 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 Remote Trigger Receptacle port of the TTR The remote control unit pushbutton lamp will illuminate Now an operator may come to the remote location and set for example the LIC to the desired position and would then depress the remote control unit pushbutton for a short time then release it The pushbutton lamp extinguishes until the TTR 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 TTR test set is ready for the next remote test Error Messages When an error message appears in the transformer t
9. 2 of reading 1 digit 3 minutes AVTMTTR320 EN Rev A Oct 2008 40 Service 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 5 7 inch full VGA color display Memory Storage Internal and USB memory device Over 1000 test results depending on size Interface Ethernet PC USB flash drive Serial port optional printer Environmental Conditions Operating temperature range 23 to 122 F 5 to 50 C Storage temperature range 58 to 140 50 to 60 C 0 to 90 noncondensing operating Relative humidity 0 to 95 noncondensing storage Physical Data Dimensions 21 5 x 13 5 x 8 5 in 44 5 x 26 5 x 17 5 cm Lx W x H Weight test set 25 Ibs 11 5 kg Case Ruggedized plastic case with removable lid and carrying strap AVTMTTR320 EN Rev A Oct 2008 41 Megger AVTMTTR320 EN Rev A Oct 2008 42 Addendum TTR 300 Series PowerDB Lite User Manual Introduction PowerDB Lite is a free but limited capability version of 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 is that PowerDB is designed to wor
10. 4 6 Setup for Testing Taps on Multiple Tap CT 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 circuit breaker ot power transformer entrance bushing The test can be performed without removal of the BCT from the equipment Proceed as follows 1 With the ON OFF Switch in the OFF position make the circuit connections as desctibed in Section 3 2 2 Connect the H and X test cables to the respective H and X receptacles of the TTR320 Make sure that the connectors are securely fastened using clockwise rotation to the receptacles 3 Using user supplied shorting jumper leads short circuit the winding on the opposite voltage side of the power transformer core 4 Connect the heavy duty clamps marked H1 and H2 of the test leads to the respective X1 and X2 terminals of the BCT as shown in figure 4 7 5 Connect the heavy duty clamp marked X1 to the power transformer terminal on which the BCT is mounted and the X2 heavy duty clamp to the terminal on the opposite side of the power transformer winding H2 side of BCT AVTMTTR320 EN Rev A Oct 2008 18 Connecting to the Transformer Check to make sure that the BCT is mounted with proper polarity with respect to power transformer entrance bushing and that connection polatities are correct BCT POLARITY MARKER TYP P X1 LEAD HI o H1 LEAD
11. 8 Loading Data Files When testing with the TTR 320 or TTR 320 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 Select the Tools 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 Open or the File 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 InternationalEnglish vi Measurements Default Units Metric Y Temperature Units C Logos Left C Program Files PowerDB Inc PowerDB powerdb megger slug E Right C Program Files PowerDB Inc PowerDB your company logo br E Cancel AVTMTTR320 EN Rev A Oct 2008 53 Megger 10 How to change Languages a Select the Tools gt Options menu item b Select the approptiate language in the dropdown menu Language InternationalE nglish
12. I 2 L 0 2 LEAD H2 Nur JUMPER LEAD X2 LEAD POWER TRANSFORMER NOTE TEST PER DIAGRAM NO 1 FOR ANSI CEIZ IEC amp AUSTRALIAN STANDARDS Figure 4 7 Setup for Testing BCT Mounted on Single Phase Two Winding Transformer BCTs Mounted on Three Phase Transformers A turn ratio test can be performed on all three BCT s using a single setup Figure 4 8 shows how to make the proper connections when the BCTs are mounted on a typical delta winding and Figure 4 9 shows how when mounted on a typical wye winding 1 With the ON OFF Switch in the OFF position make the circuit connections as desctibed in Section 3 2 2 Connect the H and X test cables to the respective H and X receptacles of the TTR320 Make sure that the connectors are securely fastened using clockwise rotation to the receptacles 3 Short circuit all windings on the opposite voltage side of the power transformer core using jumper leads 4 Check to make sure that all BCTs are mounted with proper polarity with respect to the power transformer entrance bushing Ensure that all AVTMTTR320 EN Rev A Oct 2008 19 Megger connection polarities are correct Make connections as shown in figure 4 8 for delta winding configurations and figure 4 9 for wye winding configurations H2 X2 LEAD e H1 2 LEAD B lt BCT af JUMPER H1 H3 e e X1 x2 X2 X1
13. Measurements Default Units Metric Temperature Units m Logos Left C Program Files PowerDB Inc PowerDB powerdb megger slug Right C Program Files PowerDB Inc PowerDB your company logo br El Cancel 11 How to change units of measurement a Select the Tools Options menu item b Select the units in the drop down Default Units under Measurements Language IntemationalE nalish Y Measurements Default Units Metric Y Temperature Units C w Logos Left C Program Files PowerDB Inc PowerDB powerdb megger slug ri Right C Program Files PowerDB Inc PowerDB your_company_logo br xn Cancel AVTMTTR300 Rev A Oct 2008 54 TTR Series PowerDB Lite User Manual 12 Additional Notes 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 field 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
14. The forms associated with the detected instrument will be shown in the Select a Fotm screen c Choose 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 AVTMTTR300 Rev A Oct 2008 48 TTR Series PowerDB Lite User Manual Select a Form 4 5 TRANSFORMERS 1 TTR QUICK TEST 2 TTR MULTIPLE QUICK TESTS 3 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 n to initialize the test set c Form fields with automation will now be colored cyan Right clicking these fields will start the test PowerDH Lite Transformer Turns Ratio tdt view Tools Hep Press FT for um operadon ms tructions TRANSFORMER M 05 Megger TURNS RATIO TEST i www megger com LET SUBSTATION POSITION PAGE FOPT LOCATION DATE ASSETIO TEMPERATURE 22 HMOTY Jor INVENTORY NO TESTED BY VOLTAGE VT TRATEDI Te TAPS NOMNALT CHANGER Qu Has rear 7 Round TapVotagesTo Tap Onela Listed TesVotsge ax HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS LastTap Votege fiurnberOt Tests COMMENTS DEFICIENCIES
15. 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 TTR 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 phase shift angle helps to detect transformer shorted turns or an unequal number of turns connected in parallel Operating condition error messages identify incofrect test connections abnormal operating condition or winding problems Test results can be saved either to internal memory to an external USB storage device ot can be uploaded to a personal computer PC via an ethernet port Features include Fully automatic operation Self checking at power up 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 to handle over 1000 test files depending on size AVTMTTR320 EN Rev A Oct 2008 Megger Checking reverse polarity at start of each test Via ethernet port an external PC or laptop can be connected to operate the TTR in
16. 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 AVTMTTR320 EN Rev A Oct 2008 3 PREPARING FOR TEST Site Preparation Choose a location that meets the following conditions The location is as dry as possible There is no flammable material stored in the vicinity The test area is adequately ventilated Be sure all equipment is de energized and all terminals of the UUT are accessible Erect suitable safety barriers to protect the operator from traffic hazards and to prevent intrusion by unauthorized personnel User provided Warning lights are recommended Verify that the Local station ground is intact and has impedance continuity to earth Making Circuit Connections Connections should be made in the order as listed below 1 Ground Use the Megger supplied Safety Ground Cable 15 ft 4 6 m to connect the TTR320 Wing Nut Ground Terminal directly to Local Station Earth ground Ensure the Transformer chassis also has impedance continuity to Local Station Earth ground potential Input Power Source Ground Input Power Source Ground Terminal should be less than 100 milliohms of impedance to Local Station Earth Ground Connect the Input Power Cord Before making this connection Ensure the Input Power Source meets the requirements as listed
17. 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 s screen will allow you to specify a location and file name for your Powet DB Lite XML file Save in PowerDB v j et Eg File name Save as type PowerDB XML File Pdbx ml Y Cancel AVTMTTR320 EN Rev A Oct 2008 51 Megger 7 Opening an Existing File a Select the File gt Open menu item File name Files of type PowerDB XML File Cancel Form name 4 SIMPLE 3PH TTR To view or edit a set of results Test Date Open te ene 06 18 2007 14 27 02 06 18 2007 14 26 28 New To remove a set of results select a Rag and press the Delete Delete Press the New button to enter another set of test results Open as read only b Browse to the file you would like to open Press the Open dialog button d If the 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 x onn Jnd Close AVTMTTR300 Rev A Oct 2008 52 TTR Series PowerDB Lite User Manual
18. three wire power cord and requires a two pole three terminal live neutral and ground type input source The voltage to ground from the live pole of the power source must be within the following rated operating voltage For Cat No TTR320 120 V 10 single phase sine 50 60 2 Hz For Cat No TTR320 47 230 V 10 single phase sine 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 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 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 TTR320 47 the neutral terminal 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 The control circuits of the instrument are protected by two mains circuit fuses These fuses are located in the ON OFF switch module and are replaceable by the operator To avoid electric shock and fire hazard use only the fuse specified in Sections 1 and 8 that
19. 0 PowerDB Lite Software Ethernet cable for connecting to a PC 36798 Bushing clamps 6 pcs MC7144 Instruction Manual AVTMTTR320 AVTMTTR320 EN Rev A Oct 2008 37 Megger Table 7 1 Replacement Parts List cont d Item Cat No Optional Accessories Calibration Standard for Operation Check 550555 Inverter with 3 ft 0 91 m cigarette adapter cord 12 V dc to 120 V ac 60 Hz 35271 1 12 V dc to 120 V ac 50 Hz 35271 3 12 V dc to 230 V ac 60 Hz 35271 2 12 V dc to 230 V ac 50 Hz 35271 4 Test Leads 3 shielded test lead set X and H winding 30 ft 9 1 m 37093 3 shielded test lead set X and H winding 50 ft 15 m 37094 1 shielded test lead set X and H winding 30 ft 9 1 m 37095 3 lead set adapter to allow use of Megger TTR C N 550503 lead set 30915 xxx 37087 Software PowerDB software 1st machine license soft key DB1001 PowerDB 1st machine license USB dongle DB1001S TTR printer package 120 V 60 Hz 35755 3 230 V 50 Hz 35755 4 RS232 cable for connecting to printer CA RS232 Transit case for instrument leads and accessories 37009 Field upgrade kits TTR330 interface panel 37089 1 TTR320 interface panel 37089 2 TTR310 interface panel 37089 3 TTR300 interface panel 37089 4 AVTMTTR320 EN Rev A Oct 2008 38 8 Specifications Electrical Input Power Cat No TTR320 120 V ac 10 single phase sine 50 2 Hz or 60 2 Hz 100 VA IEC 1010 1 installation category II Cat No TTR320 47 230 V ac
20. 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 CHECK PHASE A 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 Upon completion of TEST Powering down 1 Upon completion of testing press the Power Suspend button on the TTR320 to prepare the unit for shutdown Then once directed by the on scteen instruction Switch the ON OFF Switch to OFF 2 Using an adequately grounded Safety Ground Stick ground all exposed high voltage connections Then while wearing the appropriately rated rubber gloves connect Safety Ground Jumpets from all exposed high voltage cable terminals to Local Station Earth Ground It is a good idea to leave the jumpers in place for at least as long as the specimen was at test voltage 3 Remove the Test Instrument clamps from the Transformer leaving the Safety Ground Jumper in place to drain any stored charge 4 Disconnect the Power Co
21. 10 single phase sine 50 2 Hz or 60 2 Hz 100 VA IEC 1010 1 installation category II Protective Devices Fuses 2 Cat No T TR320 Type T 250 V 3 5A IEC 127 designation Cat No TTR320 47 T 250 V 1 5 A IEC 127 designation 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 TTR as spare parts Output Test Voltage and Current 3 test voltages 80 V rms 40 V rms 8 V rms Current up to 500 mA AVTMTTR320 EN Rev A Oct 2008 39 Megger Test Frequency Same as line frequency Loading of Test Transformer Less than 0 2 VA Measuring Ranges Turn ratio Excitation Current Phase Angle Deviation Accuracy Turn ratio 80 V ac 40 V ac 8 V ac Excitation Current rms Phase Angle Deviation 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 0 to 500 mA 3 digit resolution 90 degrees 1 decimal point for the minutes display 2 decimal point for the degree display 2 decimal points for the centiradian display 0 1 0 8 to 2000 0 15 2001 to 4000 0 25 4001 to 10000 0 3 10001 to 45000 0 1 0 8 to 2000 0 15 2001 to 4000 0 3 4001 to 10000 0 35 10001 to 25000 0 1 0 8 to 2000 0 25 2001 to 4000 0 35 4001 to 8000
22. AVTMTTR320 EN Rev October 2008 Instruction Manual for Three Phase TTR Transformer Turn Ratio Test Set TTR320 series Catalog Numbers TTR320 TTR320 47 HIGH VOLTAGE EQUIPMENT Read this entire manual before operating Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown PA 19403 2329 U S A 610 676 8500 WW HIGQQer COM Three Phase TTR Transformer Turn Ratio Test Set TTR320 series CopyrightO 2008 by Megger All rights reserved The information presented in this manual is believed to be adequate for the intended use of the product If the product or its individual instruments 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 below 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 for repair must be shipped prepaid and insured Contact your MEGGER representative for instructions and a return authorization RA number Please indicate all pertinent information including problem symptoms Also specify the serial number and the catalog number of the unit This warranty does not include batteries lamps or other
23. HING SERNO WEATHER SERIAL TYPE CLASS kv AMPS YEAR WEIGHT LB TEMP Ratio TYPE Tv BIL CLASS PHASES COOLANT Diagram 36 REASON Test Voltage V OIL VOLUME First Tap Voltage LastTap Voltage HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS Number Of Tests 5 Hy X4 X3 Ho Hy X2 X Hg Ho X3 Xo M 2 AVTMTTR320 EN Rev Oct 2008 59 Megger AVTMTTR300 Rev A Oct 2008 60
24. bed in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR320 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles AVTMTTR320 EN Rev A Oct 2008 16 Connecting to the Transformer 3 As shown in Figure 4 5 connect the heavy duty clamps marked H1 and H2 of the test lead to the respective X1 and X2 terminals of the CT Note that the H and X leads are connected in reverse as compared to the Single and Three phase Transformer testing described in the previous sections 4 As shown in Figure 4 5 connect the heavy duty clamps marked X1 and X2 of the test lead to the respective H1 and H2 terminals of the CT Ensure correct polarity Note that the H and X leads are connected in reverse as compared to the Single and Three phase Transformer testing described in the previous sections POLARITY H1 LEAD H2 LEAD DOT H2 X2 LEAD BUS USE HEAVY GAUGE LEAD WIRE X1 LEAD NOTE TEST PER DIAGRAM NO 1 FOR ANSI CEI IEC amp AUSTRALIAN STANDARDS Figure 4 5 Setup for Testing Unmounted Current Transformer AVTMTTR320 EN Rev A Oct 2008 17 Megger Figure 4 6 shows the setup for testing the taps on a multiple tap CT H1 LEAD X1 X1 LEAD x2 X1 LEAD ii 5 4 H2 X1 LEAD gt X4 H2 LEAD X5 X2 LEAD TRANSFORMER NOTE TEST PER DIAGRAM NO 1 FOR ANSI CEIZIEC amp AUSTRALIAN STANDARDS Figure
25. curely fastened using clockwise rotation to the receptacles Connect the heavy duty clamps marked H0 H1 H2 and H3 of the test lead to the corresponding high voltage winding terminals of the transformer under test Refer to Table 4 2 for test lead markings With delta connected windings is not used With wye connected windings a neutral connection for HO is normally available Connect the heavy duty clamps marked X0 X1 X2 and X3 of the test lead to the corresponding low voltage winding terminals of the transformer under test Refer to Table 4 2 for test lead markings With delta connected windings XO is not used With wye connected windings a neutral connection for is normally available AVTMTTR320 EN Rev A Oct 2008 14 Connecting to the Transformer 5 On OFF Switch It is only after all of the above connections are safely made and all safety precautions of sections 2 and 3 are satisfied should the On OFF switch be turned to the ON position Table 4 2 Test Lead Markings for Three Phase Transformers Test Lead Marking Transformer Heavy Duty Test Lead Clamp ANSI CEVIEC Australian Terminal Voltage Boot Color Color Band HO 1N N Neutral Red White H1 1U H2 1V B B4 High Red Yellow H3 1W C2 C4 High Red Blue X0 2N N Neutral Black White X1 2U 24 a2 a4 Low Black Red X2 2V b1 b2 b4 Low Black Yellow X3 2W C1 C2 C4 Lo
26. er Manual 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 cotrect 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 AVTMTTR320 EN Rev A Oct 2008 57 Megger PowerDB Lite Transformer Turns Ratio lol x File Edit View Tools Help 2 DWS gt Press F1 for form operation instructions
27. ervice power Problem in test specimen poor connection Problem in measuring circuit 34 AVTMTTR320 EN Rev A Oct 2008 Service Repairs Any service or repair of this equipment should be performed only by qualified persons who are awate of electrical hazards and the necessary precautions required to prevent injury Megget offers a complete Repair and Calibration Service and recommends that its customers take advantage of this service for routine maintenance or in the event of any equipment malfunction In the event Service is required contact your Megger representative for a product Return Authorization RA number and shipping instructions Ship the product prepaid and insured and marked for the attention of the Megget Repair Department Please indicate all pertinent information including catalog numbet serial number and problem symptoms AVTMTTR320 EN Rev A Oct 2008 35 Megger AVTMTTR320 EN Rev A Oct 2008 36 7 Replacement Parts List and Optional Accessories Table 7 1 Replacement Parts List Item Cat No Three phase Transformer Turns Ratio Test Set 120 V 10 single phase 50 2 Hz or 60 2 Hz 100 VA TTR320 230 V ac 10 single phase 50 2 Hz or 60 2 Hz 100 VA TTR320 47 Included Accessories Canvas carrying bag for test leads 30915 211 Power supply cord 8 ft 2 5 m 17032 4 Ground lead 15 ft 4 6 m 4702 7 Hand held switch assembly for LTC remote control testing 30915 22
28. est result screen indicating an abnormal operating condition verify the condition by taking a repeat measurement before attempting to take any corrective action 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 abnormal operating conditions occur during transformer testing error messages may appear such as below and may be 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 0 8 This message shows that a transformer under test turn ratio is less than 0 8 The TTR is not designed to test a transformer turn ratio under 0 8 AVTMTTR320 EN Rev A Oct 2008 28 Operation 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
29. expendable items where the original manufacturer s warranty shall apply We make no other 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 Megger Valley Forge Corporate Center 2621 Van Buren Ave Notristown PA 19403 2329 610 676 8500 Telephone 610 676 8610 Fax WW HIGQger COM Table of Contents Eero b se 270 1 Product Ais aca ancor tede boo tu DM 1 Vei 4 Communications US o Eu reir S 5 HOME Acton 5 Jd ERO LEONG petet esti roa edad rupes 6 2a eee 7 Safety 1s the responsibility of the USEE ooi atero inier e ire 7 Input Poser real av 8 5 PREPARING FOR TEST ee 9 SKE ado ud utc ptt ncmo Dua M Mc DM 9 Making Ered run ose agi nich a ae a 9 Aco Connectino to the Fe Den 11 Single Phase Two Winding 11 Three Phase Two Winding Transformers Rie ease 14 Three Phase Three Winding Transformers 15 Current Transformers CTS AP REIHE a nbi TR EUR
30. former 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 IEC and Australian standards are as shown in Table 4 1 Table 4 1 Test Lead Markings for Single Phase Transformers Test Lead Marking Transformer Heavy Duty Test Lead Clamp ANSI CEI IEC Australian Terminal Voltage Boot Color Color Band H1 1U High Red Red H2 1V Ai High Red Yellow X1 2U Low Black Red X2 2V 84 Low Black Yellow X1 LEAD SERIES WINDING RAISE DIRECTION SOURCE LEAD 3 TTR SHUNT WINDING H2 LEAD COMMON X2 LEAD Figure 4 3 Setup for Testing Single Phase Type A Straight Design Step Voltage Regulator AVTMTTR320 EN Rev A Oct 2008 13 Megger x TTR DIRECTION pi LEAD SERIES WINDING SOURCE H1 LEAD 5 RAISE SHUNT WINDING H2 LEAD kis JAN Figure 4 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 transformets 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR320 Make sute that the connectors are se
31. gt AN JUMPER T X1 LEAD H3 LEAD H1 LEAD X3 LEAD HO LEAD X2 X2 v N 7 S OR e X1 JUMPER LEADS TYP BCT TEST SELECTION WINDING STANDARD IEC VECTOR CODE ANSI YNyO CEIZ IEC YNyO AUSTRAL AN 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 4 8 Setup for Testing BCT Mounted on Delta Winding on a Three Phase Power Transformer AVTMTTR320 EN Rev A Oct 2008 20 Connecting to the Transformer H2 H2 OR m HO H1 H3 JUMPER LEADS H3 TYP H1 LEAD HO LEAD H2 LEAD H3 LEAD a X2 H1 P JUMPER we BCT TYP BCT POLARITY MARKER TYP X1 LEAD XO LEAD X3 LEAD X2 LEAD BCT TEST SELECTION WINDING STANDARD IEC VECTOR CODE ANS I YNynO CEI IEC YNynO AUSTRAL AN YNynO PHASE A TEST MEASURES BCT ON X1 POWER TRANSFORMER TERMINAL BCT A PHASE B TEST MEASURES BCT ON X2 POWER TRANSFORMER TERMINAL BCT PHASE C TEST MEASURES BCT ON X3 POWER TRANSFORMER TERMINAL BCT C Figure 4 9 Setup for Testing BCT Mounted on Wye Winding of a Three Phase Transformer AVTMTTR320 EN Rev A Oct 2008 21 Megger T Type Transformers T type transformers represent a special type of thee phase transformer This transformer may be tested as a s
32. iables are initialized Navigating the screen Use Arrows keys to highlight desired action Use ENTER key in center to select highlighted action HOME Screen Action Icons Select HOME key to display Action Icons AVTMTTR320 EN Rev A Oct 2008 23 Megger Action Icons JE Select NEW TEST to clear Test screen 1p h0 112 212 8 2 1 2 0 22 Figure 5 1 Cleared Test screen AVTMTTR320 EN Rev A Oct 2008 24 Operation On Board File Manager Select File to Open Current Local Directoy C Documents and Settingsydougst pplication Data Optima Systems Inc PowerDB Current USB Directoy E Internal Storage 1992988 USB Files 9116028 KB FileName P test xml 09 14 07 16 13 29 ZW test xml 09 14 07 16 13 29 4 Be 1 PdbXml 09 14 07 16 58 24 09 14 07 16 13 29 TTR_7 xml 09 14 07 16 13 29 09 14 07 16 13 29 Eo TTR_71 xml 09 14 07 16 13 29 G Use Zone Key to move cursor to various zones on display Open the selected file Figure 5 2 File Manager Recall Test Select SAVE to save test to memory AVTMTTR320 EN Rev A Oct 2008 25 Megger On Board File Manager Save File As Current Local Directoy C Documents and Settings dougs Application Data Optima Systems IncXPowerDB Current USB Directoy E Internal Storage 1997748 KB USB Files 3116488 KB File Name Mod Date F
33. ic printer model availability amp y Select to enter PREFERENCES screen Figure 1 4 HOME Action Icons AVTMTTR320 EN Rev A Oct 2008 Megger Utility Icons Print Icon Prints the Selected Report Printer must be standard USB Delete Icon Deletes the Selected File or Report supporting HP PCL protocol USB Out Icon Select to Transfer Files Reports from external USB Memory Stick to the TTR USB In Icon Select to Transfer Files or Reports from the TTR to the external USB Memory Stick Back Icon Select to return back to the previous screen ER Figure 1 5 Utility Icons AVTMTTR320 EN Rev A Oct 2008 2 Safety Safety is the responsibility of the user Only qualified and trained operators should operate the TTR320 system Operator must read and understand this entire Instruction Manual prior to operating the equipment Operator must follow the instructions of this Instruction Manual and attend the equipment while the equipment is in use In the event of equipment malfunction the unit should immediately be de energized and returned to Megger for repair The Safety precautions herein are not intended to replace your Company s Safety Procedures Refer to IEEE 510 1983 IEEE Recommended Practices for Safety in High Voltage and High Power Testing for additional information General Safety Precautions The TTR320 and the Unit Under Test UUT should both be considered as sources of ins
34. ile Name Mod Date test xml 7 K 09 14 07 16 13 29 Be _1 03 14 07 16 58 24 Be TTR_1 PdbXml 09 14 07 16 58 24 Bs TTR_ 7 xml 09 14 07 16 13 29 Be TTR 7 xml 08 14 07 16 13 29 TTR 71 08 14 07 16 13 23 71 ml 09 14 07 16 13 29 lt gt lt gt File Name NewFileName V Save to USB Copy to the selected file to the USB Drive Figure 5 3 File Manager SAVE Test screen wr Select to define Tap Structure Round Tap Voltages To Tap One Is Listed First OK CANCEL Figure 5 4 Tap Structure Define AVTMTTR320 EN Rev A Oct 2008 26 Operation 2 Select PREFERENCES set global parameters TIR Preferences SN PowerDB1234 Units Imperial M Language Native T Save File Prefix TTR 96 Error Limit 9 5 Test Voltage Auto Show Diagram Number CT Test Set Time PowerDb Version 7 0 trunk Oct 2 2008 10 58 27 Current Form Schema O Mod Date 10 2 2008 1 54 52 Calibration Date 6 5 2008 6 12 17 PM IP 10 50 31 12 Check For Updates OK Cancel Figure 5 5 Global Settings Preferences screen Owner SN Language Save File Prefix Error Limit Test voltage Units Type Show Diagram Number CT test Set Time Check For Updates User specified field Serial Number of Test Instrument Indicates displayed language
35. in Section 2 and Specifications Section 8 Also make sure that the ON OFF switch Figure 1 1 No 1 is in the OFF position Connect the input power cable to the TTR320 first then to the power source At this time leave the ON OFF switch in the OFF position AVTMTTR320 EN Rev A Oct 2008 Megger 4 Connect the Ethernet cable optional If the user chooses to operate the TTR320 in a remote control mode using PowerDB PC software then connect the Ethernet cable between the TTR320 and the PC at this time Connect the Load Tap Changer cable optional If the user chooses to operate the Test button of TTR320 from a remote distance then connect the LTC cable at this time Connect the H and X leads to the TTR320 end only at this time With the clamps disconnected from the UUT connect the Bayonet Plug on the Cable labeled to the TTR panel connector also labeled Repeat this process for the X labeled cable Ensure each connector is securely fastened using a clockwise rotation Connect the H and X clamps With the ON OFF Switch in the OFF position connect the H and X clamps in accordance with Section 4 as appropriate for the specific transformer type and test to be conducted AVTMTTR320 EN Rev A Oct 2008 10 4 Connecting to the Transformer The setup and connection instructions included in Section 4 herein pertaining to ratio polarity and phase relation assume that the transformer under te
36. ingle phase transformer In this case the jumpers indicated in Table 4 3 should be applied to the appropriate terminals of the T type transformers The TTR measured turn ratio should be compared to the calculated turn ratio indicated in Table 4 3 Table 4 3 T type Transformer Winding Phase Relationship Winding Tested High Voltage Winding Connection IEC Vector High Voltage Group Winding H Hi T T lead Hz H3 Low Voltage Winding X T T 0 A X3 External jumpers Hi H2 X X2 Phase tested Winding Low Voltage Winding Xi X2 X4 Xi X2 X1 X3 Xi X2 X Calculated Turn Ratio Remarks VH Vx VH Vx VH 49 Vx 2 Vu 2 Vx Vx 2 VH 2 Vx 22 AVTMTTR320 EN Rev A Oct 2008 5 Operation Power up Proceed only after reading and fully reading and understanding Sections 2 3 and 4 herein with particular attention on the Safety related precautions Once all Safety precautions are taken and all circuit connections are made then the user may safely turn the ON OFF switch to the ON position and operate the test instrument as described herein EMERGENCY SHUTDOWN For Emergency shutdown Push red EMERGENCY OFF button or toggle On OFF switch to OFF On power up a beep sounds the test set performs a self test check and all hardware and software var
37. is folder click Next To install to a different folder click Browse and select another folder Destination Folder C Program Files PowerDB IncYPowerDBY Browse nstallS hield lt Back Cancel AVTMTTR320 EN Rev A Oct 2008 45 Megger 3 Select Default Settings Default Settings gt Language American English Default Units Imperial z InstallShield EN 4 InstallShield Wizard will complete the installation of PowerDB Lite Click Finish to close the installation program r PowerDB InstallShield Wizard InstallShield Wizard Complete Setup has finished installing PowerDB on your computer AVTMTTR300 Rev A Oct 2008 46 TTR Series PowerDB Lite User Manual Using PowerDB Lite 1 Home 1 Select your Instrument from the Instrument Setup screen a Youcan always view the Instrument Setup screen from the Tools menu or b Select the approptiate 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 Time Domain Reflectometer Transformer Turns Ratio Learn more about PowerDB http www powerdb com about View all forms shipped with PowerDB http vwww powerdb com forms For technical support cal 1 800 723 2861 3519 c The TTR 300 310 only uses serial communicate
38. k 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 RAM 64 MB RAM minimum 512 MB RAM recommended 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 out 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 Improve Data Integrity Standardize Test Procedures Easily Use Historical Trending for Evaluation of Test Results AVTMTTR320 EN Rev A Oct 2008 43 Megger Eliminates 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 For
39. ly To check the 3 phase TTR calibration a customer should use the Calibration Standards mentioned in Calibration section of the manual AVTMTTR320 EN Rev A Oct 2008 32 Service To perform a 3 phase TTR functional test proceed as follows 1 Turn TTR 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 XO lead Make sure the leads are properly connected and that H X paits are not electrically in contact with each other 3 Turn TTR test set power on 4 After self test is complete and a QUICK TEST 5 Enter transformer type DIAG 07 YNynO WARNING Do not continue functional test if the diagram type AN DIAG 07 YNyn0 transformer type is not listed Keep the leads which are energized clear of ground and personnel and each of the other lead pair sets 6 Start TEST 7 The readings for phases A B and C should be RATIO 1 0000 30 0020 PHASE min 0 5 Texc mA 0 0 to 0 5 8 If needed as identified on the Preference screen perform the test according to steps 1 through 7 for all the excitation voltages of 8V 40 V and or 80V The readings should be the same as shown in step 7 AVTMTTR320 EN Rev A Oct 2008 33 Megger Troubleshooting The Troubleshooting Guide Table 6 1 is arranged to help you evaluate the reasons for TTR test set malfunction The table lists possible test set malfunctions which may be encountered during operation and lists p
40. mall flathead screwdriver carefully pry out the fuse holder of the input power module item 1 of figure 1 1 3 Remove and properly dispose of spent fuse s 4 Install new fuse s making sure to use the type specified on Instrument panel AVTMTTR320 EN Rev A Oct 2008 31 Megger 5 Reinstall the fuse holder in its receptacle in the input power module Connect the power cord to the TTR test set and to an energized power source If the electronic circuits still do not function propetly 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 TTR test set is functioning and calibrated properly over the entire measurement range The 3 phase TTR calibration is performed on each new or repaired unit before sending it to a customer There is a special 3 phase TTR final calibration procedure which requires a NIST traceable test equipment to be used As a result of such calibration procedure each TTR test set may be NIST certified To check the 3 phase TTR 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 TTR320 Self check A custo
41. mer 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 TTR test set is designed and optimized for the transformer turns ratio testing It uses a mixed analog digital technique to provide the 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 TTR 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 TTR functional test readings may be from 0 9980 to 1 0020 The TTR functional test readings do not represent its calibration It simply shows that the TTR test set circuitry functions proper
42. ms 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 ot SAP Imports gt From Many Other Industry Standard Software Applications Controls and Imports Data From Many non Megger Instruments AVTMTTR300 Rev A Oct 2008 44 TTR Series PowerDB Lite User Manual Software Installation To install PowerDB Lite load the PowerDB Lite CD into your CD ROM drive and follow the on screen instructions 1 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 2 Choose the destination location for the PowerDB Lite files ILE vr M Choose Destination Location Select folder where setup will install files Setup will install PowerDB in the following folder To install to th
43. n for is normally available On OFF Switch It is only after all of the above connections are safely made and all safety precautions of sections 2 and 3 are satisfied should the On OFF switch be turned to the ON position Current Transformers CTs Connections to CTs made backwards compared to power or potential transformers The H terminals on the test set must be connected 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 ina 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 AN Never use AUTO mode of operation when testing the current transformers with the rated voltage below80 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 TTR320 For this case use the TIR100 or 25 Unmounted CTs 1 With the ON OFF Switch in the OFF position make the circuit connections as descri
44. ng of a transformer X Cable receptacle Plug receptacle for connecting test leads to the low voltage X winding of a transformer Ground lug Wing nut terminal allows connection of test set to Station Earth ground AVTMTTR320 EN Rev A Oct 2008 Megger User Interface Panel Test Button Navigation Keys Home Key Zone Key Keypad Power Suspend Help Function Information Key Function Key Initiates and Terminates Testing Use Arrow keys to highlight a desired Selection Use Enter button in center to Activate the Selection Toggles HOME Action Icons Allows User to select Active area of the screen Prepares the Instrument for Shutdown A message will indicate when Input Power can be safely removed not used on some models Provides on screen Help to assist operator Provides on screen information to assist operator Displays the options available for any highlighted Selection when applicable Figure 1 2 User Interface Panel AVTMTTR320 EN Rev A Oct 2008 Getting to Know the TTR320 Communications ports Ethernet port Serial port PRINT USB Storage Figure 1 3 Communications ports HOME Action Icons Select to create NEW test Select to define Transformer Tap Structure Select to RECALL test Select to SAVE Test 3 8 2 Print Icon Prints the Selected Test data Printer driver is factory installed Please contact Megger for specif
45. ossible causes Electronic circuit repairs should not be attempted in the field Refer to Repair section Refer to Section 7 for a list of spare parts Table 6 1 Troubleshooting Guide 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 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 C 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 POSSIBLE CAUSE No service power Defective line cord Defective fuse s Defective display or electronics Out of tolerance condition s in measurement circuit 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 s
46. rd from the Input Power Source 5 Lastly disconnect the safety ground cable AVTMTTR320 EN Rev A Oct 2008 29 Megger AVTMTTR320 EN Rev A Oct 2008 30 6 Service Maintenance Maintenance should be performed only by qualified persons familiar with the hazards involved with high voltage test equipment Read and understand Sections 2 3 4 and 5 before performing any service The TTR320 requires only periodic inspection Periodically inspect all hardware items including the cable assemblies to ensure all is in good condition The TTR320 may be cleaned periodically In so doing do not allow water to penetrate panel holes 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 the cables and mating panel receptacles with isopropyl or denatured alcohol applied with a clean cloth Fuse Replacement The TTR320 is protected by two mains fuses Fuse replacement is indicated if the electronic circuits do not function Refer fuse replacement to qualified personnel only To avoid electric shock and fire hazard use only the fuses specified on Instrument panel Note that 2 spare fuses are included with each WARNING Before replacing the fuses disconnect the power input plug from the live power source To replace fuse s proceed as follows 1 Disconnect the power cord from the TTR test set 2 Using a s
47. remote control mode or 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 Multi lingual support Large easy to read full VGA color display Meets the requirements of both the European EMC and Low Voltage Directives It is recommended that the user becomes familiar with the TTR320 before ever connecting to a transformer AVTMTTR320 EN Rev A Oct 2008 Getting to Know the TTR320 Top Panel Controls Megger TTR320 ys 3 6 mra 9 2 Figure 1 1 Top Panel Controls Power input receptacle ON OFF switch and fuse holder ON OFF power switch and input power receptacle provides power to the test set Emergency OFF switch This red push button interrupts testing When pressed the switch is locked in off position To reset the switch twist the button in the direction indicated by the arrows Voltage ON light Red indicator lamp indicates when lit that test voltage is being supplied to the Unit Under Test UUT Remote Trigger receptacle Plug receptacle for connecting Remote Trigger cable for testing transformers with Load Tap Changers H Cable receptacle Plug receptacle for connecting test leads to the high voltage H windi
48. 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 setial port and do not know the port assigned to it please perform the following Remove the USB serial adapter Press Refresh Click on the port drop down and record the options Plug the adapter back in Press refresh oe de tS Select the port that was not in the original list AVTMTTR320 EN Rev A Oct 2008 47 Megger 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 TTR320 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 AVO Z Meger Model Type Series EE Supported Models 3 Phase TTR Serial Port v Refresh Byte Size 8 v Baud Rate 3600 Parity None Stop Bits 1 Use Ethernet Cancel e Then Click OK on the Instrument Setup Screen to finish 2 Open a New Form a Select the File New menu item or type CTRL N or press the New toolbar button b
49. st 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 The X test leads ate the low voltage leads When testing high voltage transformers caution must be used at all times and all safety precautions followed Read understand and employ all safety precautions and circuit connections desctibed in Sections 2 and 3 herein WARNING Ensure that the transformer to be tested is completely AN 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 WARNING AN For all testing as described herein care shall be taken to ensure any and all unused clamps shall be isolated from each other from ground and from personnel WARNING Except for CTs as described herein never interchange AN 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 Single Phase Two Winding Transformers Perform the following setup procedure for single phase two winding transformets 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3
50. tantaneously lethal levels of electrical energy Observe the following safety precautions Observe all safety warnings on the equipment They identify areas of immediate hazard that could result in injury ot death Use this equipment only for the purposes described in this manual Observe strictly the Warning and Caution information provided in this manual Treat all terminals of high voltage power equipment systems as potential electric shock hazards Use all practical safety precautions to prevent contact with energized parts of the equipment and related circuits Use suitable barriers barricades or warnings to keep persons not directly involved with the work away from test activities Never connect the test equipment to energized equipment Do not use in an explosive atmosphere Use the grounding and connection procedures recommended in this manual Always disconnect test leads from power equipment before attempting to disconnect them at the test set The ground connection must be the first AVTMTTR320 EN Rev A Oct 2008 Megger made and the last removed Any interruption of the grounding connection can create an electrical shock hazard Personnel using heart pacemakers should obtain expert advice on the possible risks before operating this equipment or being close to the equipment during operation Input Power precautions This instrument operates from a single phase sine wave power source It has a
51. w Black Blue Note According to Anstralian 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 A 3 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 winding transformer To test tertiary winding perform the following setup procedure 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR320 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles Connect the heavy duty clamps marked H0 H1 H2 and H3 of the test lead to the corresponding terminals of the transformer under test Refer to Table 4 2 for test lead markings With delta connected windings HO is not used With wye connected windings a neutral connection for HO is normally available Connect the heavy duty clamps marked X0 X1 X2 and X3 of the test lead to the corresponding tertiary low voltage winding terminals YO Y1 Y2 AVTMTTR320 EN Rev A Oct 2008 15 Megger and Y3 of the transformer under test Refer to Table 4 2 for test lead markings With delta connected windings is not used With wye connected windings a neutral connectio
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