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EDA3 (Evaluación de Aislamiento)

1. Figure 5 60 Current graph The lis 5 SOFTWARE DESCRIPTION 5 3 5 Insulation resistance graph This screen Figure 5 61 shows the insulation resistance graphs calculated from the currents read during the test corrections may be made for two temperatures 20 and 40 C Given that the current measured is very small and the fields that may be generated very large noise might become involved thus falsifying the measurement Furthermore when values of intensity close to the resolution of the machine are measured 1 nA peaks due to the background noise might appear although these do not indicate any type of problem However when higher currents are measured greater than 20 or 30 nA with sufficient resolution these peaks may be due to internal discharges or interference For this reason a data smoothing option is included This smoothing allows greater measuring resolution of the equipment to be achieved while also eliminating the possible noise To calculate the polarization index smoothed graphs should always be obtained on the other hand it is always good to know how the current graph has evolved in order to be able to compare them M4 INSULATION RESISTANCE r FIRST TEST VOLTAGE V 2491 SECOND TEST VOLTAGE Vv 4984 Polarization Index 261 Polarization Index 262 Time minutes SELECTED FILE DEDA Data V amp HUNIRABS544 EDA ALHUNIRAB8544 0 Temp Cor
2. EDA III SYSTEM Electronic Dielectric Analyzer User Manual cmm lise INDEX INDEX PROLOGUE 3 SYSTEM OF SYMBOLS 4 GUARANTEE 5 1 INTRODUCTION 6 1 1 Causes of winding ageing 2 DESCRIPTION OF THE MEASUREMENT METHOD 10 2 1 Philosophy of the method 10 2 2 Winding response to a voltage step 11 2 3 Test characteristics 13 3 EDAIII EQUIPMENT 14 3 1 Description of product 14 3 2 Elements of the system 15 3 3 Physical description of the equipment 19 4 PREPARATIONS BEFORE USE 23 4 1 Precautions in the installation area 24 4 2 Connection of equipment 25 4 3 Disconnection of the equipment 29 5 SOFTWARE DESCRIPTION 31 5 1 Introduction 31 5 2 Performing a test 34 5 2 1 Test identification 37 5 2 2 Technical data of motor alternator 42 5 2 3 Connection 45 5 2 4 Capacitance temperature humidity measures 49 5 2 5 Testing with 1 voltage 57 5 2 6 Testing with 2 voltage following 60 5 3 Test analysis 63 5 3 1 Test file selection 64 5 3 2 Technical data of motor alternator 66 5 3 3 Parameter calculation 70 5 3 4 Current graph 72 5 3 5 Insulation resistance graph 73 lise 5 4 Test copy assistant 5 5 Remarks page 5 6 Saving a test 5 7 Printing reports 5 9 About 5 10 Exiting 6 EQUIPMENT MAINTENANCE INDEX 75 76 77 78 83 84 85 6 1 Cleaning of equipment 6 2 Care of cables
3. Connection of power to PC The PC power cable is plugged into a mains socket A check should be made to ensure that the voltage is within the operating margins of the PC 2 275 lis 4 PREPARATIONS BEFORE USE Connection of Warning light to EDAIII equipment The lamp should be connected to the output 10 on the rear panel This lamp should be placed in an appropriate place close to the equipment being tested making it easy to see that a test is being performed Once the different connections between the different parts of the equipment have been performed the PC should be turned on and the control software started From now on the procedure consists simply of following the instructions that appear on the PC monitor Consequently when the software so requires the unit will be turned on 5 or the Test button pushed 4 THE UNIT SHOULD NOT BE TURNED ON OR THE TEST PUSH BUTTON PRESSED UNTIL THE CONTROL SOFTWARE INDICATES THIS When the LED bar that indicates the tests voltage indicates the presence of voltage this will not be present at the equipment outlet terminals until the Test push button 4 is pressed Any handling of the high voltage cables should be carried out with the Test push button 4 off Do not rely on the LED bar graph to indicate te absence of voltage since this begins to indicate from some 268V as a result of which there may be hazardous voltages on the cables with the LED bar apparently indic
4. Consequently IT IS ESSENTIAL THAT THE OPERATOR IN CHARGE OF HANDLING AND MAINTAINING THE EQUIPMENT BE TECHNICALLY TRAINED Likewise all persons performing or attending a test should take the necessary safety precautions to avoid any contact with the parts to be analysed or forming part of the measuring system remaining at some distance from them unless these parts are free from voltage and grounded The measurements performed using the EDAIII system are OFF LINE Consequently before beginning the test A CHECK MUST BE MADE TO ENSURE THAT THE SYSTEM IS WITHOUT VOLTAGE If the equipment is damaged during the guarantee period as a result of inappropriate use without adhering to the indications given in this chapter the repairs may be excluded from the guarantee 23 lis 4 PREPARATIONS BEFORE USE 4 1 Precautions in the installation area When this instrument is used to check high voltage machines all the safety procedures and standards normally applied to this type of machinery must be taken In any case check that the equipment being tested is completely discharged and grounded before touching it In order to ensure the safety of the equipment operators or any other worker in the immediate area and the integrity of the system itself and validity of the measurement results a series of precautions should be taken in the place where the test is going to be performed These can be summarised as follows e Check tha
5. On successful completion of this test the temporary file corresponding to the first test voltage disappears and becomes the definitive test file There is also the option of recording the test on the floppy drive a Figure 5 43 BA SAVE x Do you want to save the test in drive A Figure 5 43 Message for saving the test in drive A 62 lis 5 SOFTWARE DESCRIPTION 5 3 Test analysis A test analysis is made up of a series of screens showing the results obtained based on the currents measured and on the performance of a series of calculations based on the satisfactorily completed tests Parameter Calculate Insulation Graph D gt a gt ee bre Machine Data Current Graph Figure 5 44 Analysis menu To perform an analysis click the Analysis button on the main menu This button is used to begin a new analysis regardless of the point of execution of the program If a test was previously under way the program checks whether it has been recorded and otherwise offers the possibility of doing this Figure 5 45 M SAVE Es The test hasn t finished Do you want to save data Figure 5 45 Confirmation for saving of data prior to interrupting an unfinished test If the analysis of a previous test were already under way and were interrupted nothing would happen unless a value had been modified in which case Figure 5 46 would be displayed M4 SAVE ES Do you want to save th
6. The equipment EDAIII is able to provide very high voltage then THE CABLES SHOULD BE IN PERFECT STATE TO AVOID ELECTRIC SHOCKS OR A ERRORS AND IMPRECISION IN THE MEASURES When an anomaly is detected in the cables or you want to verify its correct state you can do this simple test We only need a multimeter that indicates us the electric continuity or discontinuity To check each cable we will come in the following way 1 Disconnect the high tension cable in their both ends 2 Check the discontinuity between active and body We take the high tension s connector that is introduced in the EDAIII unit We place one multimeter test tip in contact with the connector s interior tip active and the other multimeter test tip in contact with the connector s metallic cover Multimeter should say discontinuity Figure 6 1 Discontinuity check between active and body E lis 6 EQUIPMENT MAINTENANCE 3 Check the continuity between cable ends We take the high tension s connector that is introduced in the EDAIIT unit and the clip of the other cable end We place one multimeter test tips in contact with the connector s interior tip active and the other multimeter test tips in contact with the clip that is in the other cable end The multimeter should say continuity Figure 6 2 Continuity check between cable ends 89 lis 6 EQUIPMENT MAINTENANCE 6 4 Fuse replacement ATTENTION Before changing the fuse ALWAY
7. such that recovery of the results obtained is guaranteed 4 ANALYZER FIRST TEST VOLTAGE x TEST VOLTAGE V BEER M CHARGE Hi m 1310 Insulation Res 10 32 152 Gonm Figure 5 41 Screen with first test current and resistance measurements 2590 lis 5 SOFTWARE DESCRIPTION 5 2 6 Testing with 2 voltage following This option located on the right hand side of the Test section will be enabled when 1 There are incomplete tests only the test with the 1 voltage has been correctly completed or erroneous tests interrupted during current measurement with the 1 or 2 voltage The operation is the same as described in the previous section 5 2 5 Testing with 1 voltage The only difference is that the test voltage is the second voltage selected by the operator and is always equal to or higher than the first test As soon as the FOLLOWING button is clicked a test search function similar to the one used for analysis will appear the difference is that it is not possible to select the files which have satisfactorily completed the test with the 1 and zma voltages Figure 5 40 MFA NUMBER 123 v ABB MACHINE TYPE Hydroelectric alternator v rTest fe is Eror rSearch fe Mfr Number IX SELECTFILE CANCEL I f tsi eral Manufacturer and Mach type Figure 5
8. 6 3 Check of high voltage cables 6 4 Fuse replacement 6 5 Storage and transport 7 TROUBLESHOOTING 86 87 88 90 91 92 8 TECHNICAL SUPPORT 96 8 1 Return for calibration repair 8 2 Requests for spares 8 3 Observations 8 4 Commercial department and technical support 9 SPECIFICATIONS 97 100 101 104 105 APPENDIX A CE CONFORMITY DECLARATION APPENDIX B SYSTEM REQUIREMENTS 109 109 APPENDIX C SOFTWARE INSTALLATION 111 APPENDIX D OTHER UNITRONICS EQUIPMENT 112 D 1 Applications available APPENDIX E GLOSSARY 113 118 lis PROLOGUE PROLOGUE The user manual contains all the information required to start up and maintain the EDAIII measurement system The objective of the manual is to provide all the information required for an adequate operation IMPORTANT Read the manual completely before starting up the EDAIII unit The information contained in this manual is as accurate as it can be UNITRONICS shall accept no responsibility for direct or indirect damage caused by incorrect interpretation thereof or by inaccuracies or omissions lis SYSTEM OF SYMBOLS SYSTEM OF SYMBOLS WARNING This symbol indicates a highly hazardous procedure that might cause serious damage to the equipment or to persons and even death if not performed properly ATTENTION This symbol indicates a hazardous procedure that might cause serious da
9. C SAGEN_WIN Tests TRPARK ___654321 There will be as many subdirectories in C SAGEN_WIN Tests as machines which have been tested In each subdirectory a series of files will be generated these having a nomenclature structure similar to that of the subdirectory These files will have a 3 digit numerical extension 0 a 999 each of which will contain a test on the same machine The files to be generated are as follows EDATTTFFFFENNNN nnn In this file are recorded all the data of complete test in Excel format in text mode with tabulators medEDATTTFFFFFNNNN nnn This file is for exclusive use by the program and contains all the test data It is not editable by the operator tEDATTTFFFFFNNNN nnn In this file are recorded all data of temporary test first voltage test performed in Excel format text mode with tabulators TTTFFFFFNNNN cab In this file are recorded all the technical data of the transformer The operator may not edit this 40 lis 5 SOFTWARE DESCRIPTION Temporary files will also be generated automatically in CASAGEN_WINWTestsW whenever a process is terminated These serve a back up files in the event of a system failure and in this event the program may be continued with the last process performed These files remain in effect only until the first voltage test is successfully performed at which moment the temporary file referred to above will be generated an these deleted The files are as
10. LED has blown an authorized technical service Send the equipment to an authorized technical service The equipment is broken down Serial cable is no properly Connect it properl connected propery Send the equipment to an authorized technical service LED has blown Connection between PC and unit exists but the communications indicator 3 does no light up Another software application is using Uninstall the application EDAIIT serial port Send the equipment to an authorized technical service The equipment is broken down 92 bese SYMPTOM PROBLEM The indicator has blown During the test the TEST button 4 is pushed but does not blink The equipment is broken down The beacon cable is improperly connected The beacon cable is damaged A more than 100W beacon bs During the test the TEST button beng ases 4 is pushed but the warning light beacon does not operate The beacon fuse has blown The beacon has blown The equipment is broken down 7 TROUBLESHOOTING SOLUTION Send the equipment to an authorized technical service Send the equipment to an authorized technical service Connect it properly Contact an authorized technical service Replace the beacon for another of lower power Replace the fuse FUSE 1 Contact an authorized technical service Send the equipment to an
11. any machine All the hardware and applications have been developed by the UNITRONICS Project Department this offering a guaranteed maintenance service Throughout the development of all the systems real tests have been performed at the installations in which the equipment is later to be used This ensures adequate operation and allows future modifications to be made on the basis of the experience of UNITRONICS tools users The fact of having different applications on a single medium implies a series of advantages over traditional instrumentation among them the following Unification of the measurement systems Common database for all tests Common hardware components for all systems Reduction of costs in instrumentation Ease of use guided operation Instructions and menus in English Simple maintenance and possibility for modifications Graphic presentation of results Prior automatic evaluation of results Trends analysis Simplification of calculations 117 lis APPENDIX D OTHER UNITRONICS EQUIPMENT D 1 Applications available EDAIII analysis of motor and alternator insulations Figure D 1 Figure D 1 Photograph of EDAIII equipment ETP complete transformer testing UMIB Transformer Turns Ratio Meter Figure D 2 Figure D 2 Photograph of UM1B equipment 118 lis APPENDIX D OTHER UNITRONICS EQUIPMENT UM2B Recovery Voltage Meter Figure 3 Figure D 3 Photograp
12. communicating with the PC When communications are lost this LED will go out In the event of high external luminosity look at the indicator head on to check communications status 4 Luminous high voltage application push button TEST button 4 This is located below the luminous power on indicator It enables the connection of the external high voltage wiring to the inside of the unit In the event of problems arising during the test this button should be turned off to prevent risk 5 Red beacon type lamp The warning lamp is connected to the rear panel of the EDAIII unit and activates and deactivates automatically It activates when voltage is applied and during discharging cycles and is deactivated for the rest of the time It is used as a safety warning device to alert people nearby to the presence of high voltage This beacon carries danger hot surface indicator If it works for a long time it could come to burn In such case manipulate it by inferior surface or leave it until it cools The rest of the indicators warnings appear on the computer screen and will be described in detail in chapter 5 Software description 29 liz 4 PREPARATIONS BEFORE USE 4 PREPARATIONS BEFORE USE The EDAIM is a high voltage evaluation system as a result of which it may provide high voltages during testing up to 6000 volts constituting a serious threat for the operator if the manipulation is carried out of specifications
13. follows tEDATTTFFFFFNNNN nnn In this file are recorded all the temporary test data until the last process performed prior to performance of the first voltage test in Excel format and in text mode with tabulators medEDATTTFFFFFNNNN tnn In this file are recorded all the temporary test data up to successful completion of the first voltage test The EDAIII software uses this name structure to search for test as a result of which THE USER MUST NOT ALTER THE NAMES GENERATED BY THE PROGRAM FOR EACH TEST There are three buttons in the identification window Y OK X CANCEL and gt NEXT The CANCEL button returns to the main window without validating any possible change made on the window fields The OK and NEXT buttons basically perform the same function except that OK validates the changes made in the window and returns to the main panel while NEXT also validates the data but goes to the next process to be performed The functionality of these buttons will be the same regardless of the windows in which they might appear Me liz 5 SOFTWARE DESCRIPTION 5 2 2 Technical data of motor alternator This screen Figure 5 12 is used to insert technical data of the machine to be tested The upper part of the screen displays data identifying the machine as inserted on the previous screen All are shown against a yellow background this indicating that they are informative data and cannot be modified POWER MW Mach
14. not have the corresponding application which will be able to acquire at any time to see 8 chapter and appendix B 31 liz 5 SOFTWARE DESCRIPTION In this case eyelash is selected titled ROTATIVE MACHINE or the corresponding icon of the superior part On starting the EDA software the main menu screen will appear Figure 5 2 This basically offers two operations options Performance of a test Test Analysis of results Analysis 24EDA SYSTEM Figure 5 2 Main EDAIII program screen To perform a test a series of parameters are required such as identification data of the machine test voltage etc these being provided by the operator Subsequently it will be possible to carry out a results analysis based on the measured parameters along with a series indicatives derived from these parameters by calculations 85 lis 5 SOFTWARE DESCRIPTION Also provided is a series of utilities such as a file copy assistant or a notebook for the record of events occurring during testing or analysis At any moment it is possible to solve doubts regarding the operation of the program thanks to the help function incorporated If the PC is not equipped with a security key connected to the parallel port LPT1 the program will not be executed and it will show a message indicating this If the customer has only the analysis security key the test option will be disabled and it will be possible only to perform analy
15. pA 0 sec 995 nA 0 sec 0 sec 10sec 1 012 pA 10 sec 506 nA 10 sec 10 sec 20 sec 874 nA 20 sec 355 nA 20 sec 20 sec 30 sec 803 nA 30 sec 277 nA 30 sec 30 sec 40 sec 756 nA 40 sec 228 nA 40 sec 40 sec 50 sec 726 nA 50 sec 193 nA 50 sec 50 sec 1 min 704 nA 1 min 170 nA 1 min 1 min 2 min 634 nA 1m 30s 124 nA 2 min 1m 30s 3m16s 609 nA 2 min 97 nA 3m16s 2 min 5 min 583 nA 5 min 10 min 560 nA 10 min 15 min 549 nA 15 min 20 min 543 nA 20 min 30 min 532 nA 30 min TEST RESULTS CAPACITANCE VOLTAGE LEAKAGE CURRENT RATIO 33 09 RATIO La RATIO V Mc oS FIRST TEST VOLTAGE SECOND TEST VOLTAGE sem 0 127 124 1 62 425 499 9 46 83413 200 98 1007 26 63 74 SEA 80 lis 5 SOFTWARE DESCRIPTION cu NT GRAPH With Reference Graph FIRST TEST SECOND TEST VOLTAGE V 408 VOLTAGE V 609 Reference Graph Current nA 1119 7 1 D 1 D 1 1 1 DJ DJ DJ 1 1 1 1 1 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 Time min INSULATION RESISTANCE GRAPH Corrected to 68 F No smoothing Polarization Second Test Voltage Sa 1 24 a os oe oe Second Test Voltage Smoothing ee 1 24 First Test Voltage First Test Voltage Smoothing 0 90 0 85 0 80 0 75 E o70 0 65 E 0 60 0 55 c a E 0 50 0 1 2 3 4 5 6 7 8 9 10 Time min 81 lis 5 SOFTWARE
16. test of this type is performed in other words when the test is only successfully completed at the first voltage an incomplete test is said to have been carried out Whenever the Test button is clicked the Continuation button will be enabled allowing an incomplete test to be completed The working method will be similar to that used for complete tests 36 liz 5 SOFTWARE DESCRIPTION 5 2 1 Test identification When the operator decides to perform a test the first thing to be done is to identify the machine to be tested this allowing a name to be given to the file which is to contain the test data Test identification This identification is accomplished in accordance with the following data as shown in Figure 5 9 DATA TEST IDENTIFICACION 68544 Hydroelectric alternator ALH Test Miguel Angel Marcos Figure 5 9 Screen with test identification data MFR NUMBER Serial number of the machine being tested MANUFACTURER The manufacturer is selected from a list If the manufacturer you want is not on the list select other to insert a new one Figure 5 10 Whenever the option other exists a similar window will be displayed 24 MANUFACTURER Figure 5 10 Screen for introduction of manufacturer s name of the machine being tested 237 liz 5 SOFTWARE DESCRIPTION MACHINE TYPE The machine type is selected from a list which cannot be modified by the operator FU
17. that depend of the Leakage Current and the Reabsorption Current Leakage Current Ratio Reabsorption Leakage Current Ratio Leakage Currents and Reabsorption Currents can vary slightly Therefore it is necessary to consider 2 important questions 55 liz 5 SOFTWARE DESCRIPTION 1 To compare tests normal and short in a same machine to see the variation of the parameters and to have it in account for the reliability in future tests 2 It is necessary to be carefull of the configuration of the variables that determine when a machine is loaded because a bad configuration can cause that the test is cut before which should a Wide of Window Min is the wide one of time during which we observed if the slope of the current curve is the sufficiently flat like cutting the LOAD process By defect it is 5 minutes b Slope It is the difference in between the first minute and the last one of the window below which a flat curve is considered and therefore cuts the LOAD process By defect the value is 3 96 Over 5 is dangerous already to that the test can be cut before the machine is loaded The point of cut of the LOAD process is not immediate it is expected the following minute multiple of 5 and it is always going to be greater of 10 minutes Example Let us suppose that in the first minute of a window of 5 minutes 100 nA were measured of average and in the fifth minute 104 nA were measured If the slope is 3 software will no
18. this is being accomplished CALIBRATING INSTRUMENT Figure 5 22 Message indicating unit calibration Then the program requests the measuring cables to be connected to the machine being tested Figure 5 23 and once this has been performed it begins to measure its capacitance at two different frequencies first at 1 kHz Figure 5 24 and then at dc Figure 5 25 y CAPACITANCE RE CONNECT TEST CABLES TO THE MACHINE Figure 5 23 Message for connecting the high voltage cables to the machine being tested MEASURING 1kHz CAP Figure 5 24 Message indicating that capacitance at 1 kHz is being measured MEASURING DC CAP Figure 5 25 Message indicating that capacitance at d c is being measured 50 lis 5 SOFTWARE DESCRIPTION If the capacitance measured is less than InF the program displays an error message Figure 5 26 and offers the possibility of repeating the measurement Figure 5 27 4 CAPACITANCE x Capacitance measured below 1 nF Figure 5 26 Warning that the capacitance measured is less than 1 nF 4 CAPACITANCE x Do you want to test again Figure 5 27 Screen allowing for capacitance measurement repetition There may be erroneous humidity readings because of handling of the unit and or sudden changes in the ambient conditions If this occurs the equipment should be left for a while to adapt to the conditions and the measurements repeated O
19. to each test voltage the left hand column indicates the absorption currents and the right hand column the reabsorption currents DATA INSULATION TEST in 4 1725 2 min 10 min 10 min 145 min au 15 min Figure 5 53 Screen with currents measured throughout the test 67 liz 5 SOFTWARE DESCRIPTION The currents can be modified manually by clicking the cause a new screen to be displayed Figure 5 54 for editing button which will 3 Edit Currents Firts Test Voltage Figure 5 54 Currents editing screen The data introduced must be coherent the absorption currents must always be positive and the reabsorption currents negative Otherwise the program will display this error when the OK button is clicked Figures 5 55 or 5 56 y WARNING The Charge Currents should be bigger than Zero Figure 5 55 Error message indicating that the charge currents should be positive above zero oC WARNING Figure 5 56 Error message indicating that the reabsorption currents should be negative below zero 68 lis 5 SOFTWARE DESCRIPTION Once the new value has been accepted the program asks whether the new data are to be used to modify the current graph and or calculated parameters If the current graph is modified a message is generated warning of the loss of display resolution Figure 5 57 This is due to the fact that although the program shows values using only 2
20. 0081 part 2 93 UNE EN 50082 part 1 92 EN 61000 3 2 95 EN 61000 3 3 95 EN 61000 4 2 95 IEC 1000 4 3 95 EN 61000 4 4 95 EN 61000 4 5 95 EN 61000 4 6 96 EN 61000 4 11 94 IEC 61326 1 97 Low voltage directive DC 73 23 CEE Applicable armonized standards UNE EN 61010 1 96 Authorised Signat Madrid May 17 of 2000 UNITRONICS S A U Pozo de Espa a 12 pl 9 ut 915 40 01 25 28008 MADRID Jairtie Carreras de la Fuente Manager Corporate seal Y VGA Color Monitor v Floppy disk drive 3 Y inch 114 bin CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espa a 18 9 fl off 9 28008 Madrid SPAIN VAT number ES A 28121572 i Tel 34 1 542 52 04 UNITRONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation tester Dielectric test with continuous voltage step Equipment EDA Manufacturer UNITRONICS Model EDAIII at which this declaration refers with the disposals of the following directives and applicable standards CE Marking directive DC 93 68 CEE Electromagnetic compatibility directive DC 89 336 CEE Applicable armonized standards UNE EN 50081 part 2 93 UNE EN 50082 part 1 92 EN 61000 3 2 95 EN 61000 3 3 95 EN 61000 4 2 95 IEC 1000 4 3 95 EN 61000 4 4 95 EN 61000 4 5 95 EN 61000 4 6 96 EN 61000 4 11 94 IEC 61326 1 97 Lo
21. 3 time values it uses 200 internally for the display however if any value is changed the 23 values will be used to generate the graph j WARNING A The current graph can lose resolution The original graph will be lost Figure 5 57 Warning that current graph might lose resolution On all the screens that include the button there is the possibility of printing the current screen or a complete test report Figure 5 58 For more information on report printing refer to section 5 7 A4 PRINT x e C Print Report X vl CANCEL OK Figure 5 58 Selection for screen or report printing 69 liz 5 SOFTWARE DESCRIPTION 5 3 3 Parameter calculation This screen Figure 5 59 shows the calculations performed on the basis of the currents read during the test The meaning of certain parameters is clarified below Insulation Resistance xx C Insulation resistance corrected to xx C measured in Gig ohms Std Leakage Current xx C Leakage current standardised with respect to the test voltage and capacitance at 1kHz and corrected to xx C Reabs Leakage Current Ratio Ratio of leakage current and reabsorption current Standard Reabs Index at thickness Reabsorption current standardised with respect to insulation thickness Capacitance Ratio Ratio of d c capacitance to 1 kHz capacitance expressed in per cent Voltage Ratio Ratio of 2 an
22. 40 Search for tests without 2 voltage performed In order to initiate the search the first thing to be specified is the type of test previously performed on the machine in other words whether the test has been incomplete up to the 1 voltage or erroneous neither the 1 or second voltage has been completed From here on the search may be performed either by manufacturing number or manufacturer and machine type If the search is performed using the manufacturing number there is an option for manual or automatic searching If automatic a menu will appear when this control is activated showing the numbers of the machines on which the type of test selected has been performed and the rest of the fields are filled in automatically If the search is manual the number has to be input and if any test on the machine is found the rest of the fields have to be filled in if no such test is identified the fields are left blank indicating that there is no test on this machine 60 liz 5 SOFTWARE DESCRIPTION If the search is carried out by manufacturer and machine type this area is highlighted in a grey box and if these fields are clicked a menu will appear showing the machine manufacturers or types If when selecting one of these the manufacturing number is not filled in automatically it means that no test of this type has been performed on a machine having the characteristics selected Once the machine to be analyzed has been s
23. DESCRIPTION 5 8 Help From this button access may be gained to the on line help amp EDA HELP A ES Archivo Edici n Marcador Opciones Ayuda Conenao Eee o mm i EDA Electronic Dielectric Analyzer 0 Introduction 1 Main menu 1 1 Test 1 2 Analysis 1 3 Co 1 4 Remarcks 1 5 Save 1 6 Print 1 7 Help 1 8 About 1 9 Exit 2 Test 2 1 Test Identification BEGINNING 2 2 Machine Data 2 3 Test Probes Connection 2 4 Measured Capacitance Temperature 2 5 First Test Voltage 2 B Second Test Voltage FOLLOWING 3 Analysis 3 1 Select File Figure 5 66 On line help 82 lis 5 SOFTWARE DESCRIPTION 5 9 About When this button is pushed a window appears Figure 5 67 showing the following Licensing data Program version data EDA SYSTEM http www unitronics electric com Program developed by unitronics electric in colaboration with Iberdrola License Number 0 Figure 5 67 Screen with license data and software version Furthermore from this window it is possible to configure the application selecting the unit of temperature the language the date format or the type of power source see section 5 1 This screen also appears when the program is executed 83 lis 5 SOFTWARE DESCRIPTION 5 10 Exiting This button a is used to quit The program will in all cases ask for confirmation of this action Figure 5 68 4 EXIT x Are y
24. EASE WAIT PRESS Esc IF YOU HAVE ANY PROBLEM Figure 5 15 Screen of automatic discharging of the machine being tested Manual This is accessed by clicking the o button shown in the lower part of the discharging window Figure 5 15 A window will now appear with a clock which the operator will use to establish the time he estimates as necessary for the discharge Figure 5 16 Following this the operator manually discharges the machine taking the cables to ground by way of suitable protection measures as MANUAL DISCHARGE ES Choose the discharge time and short the winding to ground YN ii malo SEG x CANCEL iCHRONOMETER Figure 5 16 Chronometer for manual discharging of the machine being tested Once checked the discharged machine condition a screen with the instructions which must be followed will appear Figure 5 17 Errors in this power up protocol are shown by means of luminous signals if the LED to the left of the item blinks this indicates that the condition is not met Likewise it is essential for the equipment to be connected to a grounded power supply since if this is not the case the equipment may be damaged or the measurements taken may be incorrect At this moment the high voltage cables between the EDAIII unit and the machine being tested should be still disconnected 46 5 SOFTWARE DESCRIPTION y CONNECTION Figu
25. ER EDA ES Enter the serial number of the unit EDA Figure 5 7 Screen to enter the serial number of the unit performing the test gt 35 lis 5 SOFTWARE DESCRIPTION Then a check is then made for the existence of incomplete tests these being those for which the test with the first voltage has not been initiated or those which the test at the first voltage has been completed satisfactorily The program offers the possibility of continuing with an incomplete test of eliminating all incomplete tests or of beginning a new test Figure 5 8 Existing incomplete tests without carrying out the first test voltage If you want to continue with the test press the button select file or F1 If you want to carry out a new test press the button cancel or Esc If you want to delete all the temporary files press the button delete or F3 BCE DELETE SELECT FILE Figure 5 8 Warning of incomplete tests It is possible to divide the complete test into two parts with which it will not be necessary to wait until the machine discharges between tests this is especially useful in the case of large rotating machines which may take several hours to discharge In this way the first part of the test may be performed on another machine while the first is discharging returning later to the latter for performance of the second test This testing system may also be useful if a large number of machines are to be checked When a
26. Espa a 18 9 fl off 9 pe s 28008 Madrid SPAIN 4 VAT number ES A 28121572 d Tel 34 1 542 52 04 UNITRONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation tester Dielectric test with continuous voltage step Equipment EDA Manufacturer UNITRONICS Model EDAIII at which this declaration refers with the disposals of the following directives and applicable standards CE Marking directive DC 93 68 CEE Electromagnetic compatibility directive DC 89 336 CEE Applicable armonized standards UNE EN 50081 part 2 93 UNE EN 50082 part 1 92 EN 61000 3 2 95 EN 61000 3 3 95 EN 61000 4 2 95 IEC 1000 4 3 95 EN 61000 4 4 95 EN 61000 4 5 95 EN 61000 4 6 96 EN 61000 4 11 94 IEC 61326 1 97 Low voltage directive DC 73 23 CEE Applicable armonized standards UNE EN 61010 1 96 Authorised Signat Madrid May 17 of 2000 UNITRONICS S A U Plaza de Espa a 19 pl 99 1M 915 40 01 25 28008 MADFCIF Jaime Carreras de la Fuente Manager Corporate seal APPENDIX A CE CONFORMITY DECLARATION 109 bin CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espa a 18 9 fl off 9 28008 Madrid SPAIN VAT number ES A 28121572 i Tel 34 1 542 52 04 UNITRONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation t
27. IC SHOCKS The maintenance of the equipment is very simple and consists only of maintaining it in good conditions externally and of keeping the cables supplied in good condition In the event of a blown fuse this should be changed for another of identical characteristics as described in section 6 4 Fuse replacement In the event of repeatedly blown fuses send the unit for repair see section 8 1 Return for calibration repair In order to ensure that the values remain within the specified limits of accuracy the equipment should be calibrated once a year Special care should be taken to prevent the blockage of sensors on the rear panel getting wet protecting it against rain if necessary In the event of extreme humidity or temperatures or of these parameters being outside the margins the measurements provided by the equipment could be inaccurate and it will be necessary to wait for the equipment to recover sensor operability For example if the sensors have become wet and especially in the case of high humidity they should be left to dry Likewise any change to the location of the equipment especially if in storage may cause rapid temperature variations giving rise to the appearance of humidity because of condensation 85 lis 6 EQUIPMENT MAINTENANCE 6 1 Cleaning of equipment ATTENTION Always switch off the power switch 5 and disconnect the supply cable before cleaning the equipment Use the following to clean th
28. In any case contact the technical service 97 TA D 8 TECHNICAL SUPPORT CLIENT DATA COMPANY Client No Address City Zip code Province Contact person e mail Telephone Fax EQUIPMENT DATA EDAIII serial No Date of purchase Date of last adjustment calibration Date of last revision repair Cause for return Equipment calibration Calibration certificate required Equipment reparation fill in only in case of a problem Is the equipment under guarantee O Yes No Date of occurrence of fault Equipment fault detected Power LED does not light up Communications LED does not light up Test button does not light up Voltage indicating bar does not light up Beacon does not light Fuses blown repeatedly Serial cable deteriorated High voltage cables deteriorated D0oO00o000000 Beacon cable deteriorated 98 bene 8 TECHNICAL SUPPORT Equipment broken down Others Description of fault Materials sent Table 8 1 Calibration reparation form 99 lis 8 TECHNICAL SUPPORT 8 2 Requests for spares Contact the Sales Department 100 lis 8 TECHNICAL SUPPORT 8 3 Observations The EDAIII equipment has been developed and tested under the same conditions and in the same installations as the equipment will encounter during operation Nevertheless it is always good to gain insight into the degree of satisfaction of the c
29. N DATE 11 12 1998 POLYESTER TEST DATE 11 12 1998 OTHER LAST TEST DATE INSULATION TYPE MICA TOTAL RUNNING HOURS OTHER HOURS SINCE LAST TEST 500 0 INSULATION CATEGORY A 221 F RPM 50 pur iia B 266 F IP PROTECTION GRADE 12 pede START TIMES BY YEAR 2 H 356 F INSULATION THICKNESS mm C 426 F OTHER REMARKS prueb as 79 bene 5 SOFTWARE DESCRIPTION Insulation Resistance 68 F Gohm Insulation Resistance 104 F Gohm Polarization Index Absorption Index Time Constant seg Absorption Ratio Reabsorption Leakage Current Ratio Leakage Current nA Std Leakage Current 68 C nA V F Std Leakage Current 104 C nA V F Reabsorption Current Standard Reabs index at Thickness Insulation Resistance 68 F Gohm Insulation Resistance 104 F Gohm Polarization Index Absorption Index Time Constant seg Absorption Ratio Reabsorption Leakage Current Ratio Leakage Current nA Std Leakage Current 68 C nA V F Std Leakage Current 104 C nA V F Reabsorption Current Standard Reabs index at Thickness MEASURES WINDING TEMPERATURE F 71 EXTERNAL TEMPERATURE F 66 RELATIVE HUMIDITY 45 DC CAPACITANCE nF 9 1 kHz CAPACITANCE nF 6 FIRST TEST SECOND TEST VOLTAGE V 408 VOLTAGE V 609 CHARGE REABSORPTION CURRENT labs 1 lIrabs 1 labs 2 Irabs 2 0 sec 1 433
30. NCTION Function of the alternator motor within the installation SITE NAME The name of the installation Ej C T Pisuerga is selected from a list If the location you want is not on this list a new one may be included by selecting the option other TECH SITE The location of the machine at the installation e g Pump house is selected from a list If the location you want is not on this list a new one may be included by selecting the option other DONE BY The name of the operator performing the test is selected from a list If the operator is not on this list a new one may be included by selecting the option other INSTRUMENT EDA3 Serial number of the EDAIII used to perform the test DD MM YYYY Date of the test The program checks that the date is correct In all the fields in which new items may be added to a list they may also be deleted by placing the mouse cursor over the item in question and clicking with the right hand button Figure 5 11 All these data are obligatory In other words for the program to allow work to continue all the data must be included correctly AI DELETE ES Do you want to delete this Manufacturer Figure 5 11 Confirmation for deletion of manufacturer s name 38 liz 5 SOFTWARE DESCRIPTION The MFR NUMBER MANUFACTURER and MACHINE TYPE fields are part of a test search function In other words if a test has been perfor
31. ONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation tester Dielectric test with continuous voltage step Equipment EDA Manufacturer UNITRONICS Model EDAIII at which this declaration refers with the disposals of the following directives and applicable standards CE Marking directive DC 93 68 CEE Electromagnetic compatibility directive DC 89 336 CEE Applicable armonized standards UNE EN 50081 part 2 93 UNE EN 50082 part 1 92 EN 61000 3 2 95 EN 61000 3 3 95 EN 61000 4 2 95 IEC 1000 4 3 95 EN 61000 4 4 95 EN 61000 4 5 95 EN 61000 4 6 96 EN 61000 4 11 94 IEC 61326 1 97 Low voltage directive DC 73 23 CEE Applicable armonized standards UNE EN 61010 1 96 Authorised Signat Madrid May 17 of 2000 UNITRONICS S A U Plaza de Espa a 19 pl 99 t 915 4001 25 28008 MADAT Jaime Carreras de la Fuente Manager Corporate seal APPENDIX B SYSTEM REQUIREMENTS The control software specifies the following requirements to its correct operation 111 bin CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espa a 18 9 fl off 9 p E 28008 Madrid SPAIN E VAT number ES A 28121572 Tel 34 1 542 52 04 UNITRONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation tester Dielectric test with continuous v
32. S unplug the power cable Always use fuses of the type and value specified see chapter 9 Specifications In order to avoid possible power voltage peaks which might damage the EDAIII unit this unit incorporates two fuses one for the equipment itself 8 and a second for the warning beacon 9 The fuse holder may be slid outwards with one s finger or a small screwdriver Inside this element there is the operating fuse and a spare fuse in an adjacent compartment Safety precautions should be taken and the test cables for the equipment being tested should be disconnected Furthermore the EDAIII unit should be placed at a distance from the equipment being tested After fulfilling the aforementioned safety processes the fuse may be changed in accordance with the following procedure Turn off the switch on the rear panel Disconnect the cables from the equipment being tested Disconnect the power cable Open the fuse holder Remove the blown fuse Insert the replacement fuse NA Un hh YI N m Close the fuse holder 90 lis 6 EQUIPMENT MAINTENANCE 6 5 Storage and transport Any changes in the location of the equipment especially if in storage may cause rapid temperature variations leading to the appearance of humidity due to condensation on the sensors and inside the equipment This may lead to erroneous measurements or in the worst case to short circuiting Before storing the equipment it is advisable to cle
33. The unit is not injecting tension to the measured equipment Disconnect the Test button 4 The measured equipment is not charged You can the unit make the opportune discharge or you can carry it out in a manual way For properly measuring the cables must be completely stretched until the measurement point without creases or anyway that these have a radius not inferior than 200 mm 26 lis 4 PREPARATIONS BEFORE USE The phases may be interconnected by means of bare copper wire if the distances are short or there is no risk of short circuiting to ground otherwise an insulated cable should be used Figure 4 2 Detail of high voltage cables to motor connection If the shell of the machine to be analysed is grounded a check should be made to ensure that this is the same as the ground connection for the PC and measuring unit power To do this join the two points with a twisted cable of adequate cross section ALL THE GROUNDS USED IN THE TEST SHOULD BE INTERCONNECTED While measuring the cables must not be stepped on nor moved because the measurements could be altered specially when measuring high quality insulations Connection of EDAIII equipment to the mains This connection is accomplished by plugging the power cable into 7 to a mains socket A check should be made to ensure that the voltage is within the operating limits see chapter 9 Specifications and that the socket has a ground connection
34. an it It is also recommended that all the elements making up the equipment are stored in appropriate containers The location used for storage of the equipment should meet the following requirements No direct exposure to sunlight No exposure to high levels of dust Noexposure to high degrees of humidity No exposure to active gases Noexposure to extreme temperatures The recommended storage conditions are in the chapter 9 Specifications In areas of high humidity it might be advisable to use bags of desiccant material If the storage period has been long it is advisable to send the equipment to an authorized technical service for calibration When transporting the equipment for the performance of tests in different locations appropriate containers should be used Likewise the equipment should not be subjected to continuous vibrations and knocks should be avoided The equipment should be transported under the conditions recommended above for storage 9 lis 7 TROUBLESHOOTING 7 TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION Power cable is not properly connected Connect it properly Checks power supply and unit s specifications Replace the fuse see section 6 4 If the fault continues send the equipment to and authorized technical service Power supply s features are not correct Unit fuse has blown The power switch is on but the power LED does no light up Send the equipment to
35. atibility directive DC 89 336 CEE Applicable armonized standards UNE EN 50081 part 2 93 UNE EN 50082 part 1 92 EN 61000 3 2 95 EN 61000 3 3 95 EN 61000 4 2 95 IEC 1000 4 3 95 EN 61000 4 4 95 EN 61000 4 5 95 EN 61000 4 6 96 EN 61000 4 11 94 IEC 61326 1 97 Low voltage directive DC 73 23 CEE Applicable armonized standards UNE EN 61010 1 96 Authorised Signat Madrid May 17 of 2000 UNITRONICS S A U Plaza de Espa a 19 pl 99 t 915 4001 25 28008 MADAT Jaime Carreras de la Fuente Manager Corporate seal Y Guaranteed Operative systems MS Windows 95 MS Windows 98 MS Windows NT 4 with Service Pack 4 or greater MS Windows Me MS Windows 2000 and MS Windows XP Y A Minimum of 16 MB RAM 32 recommended 113 bin CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espa a 18 9 fl off 9 p E 28008 Madrid SPAIN E VAT number ES A 28121572 Tel 34 1 542 52 04 UNITRONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation tester Dielectric test with continuous voltage step Equipment EDA Manufacturer UNITRONICS Model EDAIII at which this declaration refers with the disposals of the following directives and applicable standards CE Marking directive DC 93 68 CEE Electromagnetic compatibility directive DC 89 336 CEE Applicable armonized standards UNE EN 5
36. ating OV If the measure process is interrupted for any reason before manipulating the cables the operator it should be made sure that The unit is not injecting tension to the measured equipment Disconnect the Test button 4 The measured equipment has been discharged Let the unit makes the opportune discharge or you carry out it in a manual way ES m lis 4 PREPARATIONS BEFORE USE 4 3 Disconnection of the equipment ATTENTION Handling of the cables should be carried out with great care since work is being performed with high voltage direct current There are moments during the test when the equipment may be electrically charged at high voltage and handling of the cables and equipment following the test may be hazardous Consequently the safety measures normally applied to high voltage installations should be adhered to On completion of the test the equipment itself will discharge the machine being analysed Likewise the computer will display a screen showing the current still present It is ESSENTIAL to wait until the current is no longer a hazard for the operator Consequently the EDAIII unit should be turned off following measurements ONLY when the control software indicates this action Any handling of the high voltage cables should be carried out when the Test push button 4 is no longer pressed and the warning beacon is off When requested to do so by the program disconnect the EDAMI unit fol
37. authorized technical service The LED bar is broken The LED bar shows the maximum coun Send the equipment to an authorized technical service voltage but PC shows lower voltage level being injected dicen is broken down Send the equipment to an authorized technical service 93 SYMPTOM PROBLEM 7 TROUBLESHOOTING SOLUTION The equipment does not measure capacitance The equipment measures temperature and or humidity incorrectly The offset capacitance of the cables is improperly calibrated The high voltage cables are improperly connected The high voltage cables are damaged The equipment is broken down Recalibrate with the cables in open circuit Connect them properly Check cables see section 6 3 If the fault continues contact an authorized technical service Send the equipment to an authorized technical service The sensors are wet The equipment is improperly calibrated The equipment is broken down Leave sensors to dry Send the equipment to an authorized technical service Send the equipment to an authorized technical service The TEST button is pushed but the equipment does not output voltage High voltage cables improperly connected are High voltage cables are damaged The equipment is broken down Take off the test button and connect them properly Check cables see section 6 3 If the fa
38. be printed is accomplished by using the options on the menu shown by the program Figure 5 65 A4 PRINT x I Test Current Graph With Reference Graph C With Second Test Voltage j Insulation Resistance Graph f 20 C Correction 40 C Correction I No Smoothing Graph Smoothing Graph Figure 5 65 Print options menu A report may have 2 or 3 pages depending on whether or not the graphs are printed The following 3 pages show the appearance of a report The 1 page shows the test data and technical data of the machine tested and in the lower part the remarks made during the test or analysis The 2 page shows the conditions under which the measurements have been made the currents measured during the test and the parameters calculated The 3 page if it exists shows the current graphs and the insulation resistance graph 78 bene 5 SOFTWARE DESCRIPTION gt EDA ELECTRONIC DIELECTRIC ANALYZER J IDENTIF ON SITE NAME UNITRONICS TECHNICAL SITE Laboratorio MACHINE TYPE Motor de baja tensi n MFR NUMBER 123prueba126 MANUFACTURER SIEMENS FUNCTION prueba DONE BY Francisco INSTRUMENT EDA2 96000 ICAL DATA VOLTAGE kV 6 00 BINDER TYPE ALPHALTIC POWER MW 1 000 med SHELLAC INSTALLATIO
39. d 1 test voltages Leakage Current Ratio Ratio of the leakage current at the 2 test voltage and that at the 1 voltage 70 5 SOFTWARE DESCRIPTION Figure 5 59 Screen with the calculated parameters The button which is shown in the lower part of the screen is for recalculation of the data if any value on the current screen or on the previous currents screen has been modified Consequently this will be activated only if any data value has been changed 71 lis 5 SOFTWARE DESCRIPTION 5 3 4 Current graph This screen Figure 5 60 shows the graphs for the two types of currents read during testing A clear distinction is made between the absorption conduction and reabsorption zones for greater clarity see also Figure 2 1 The lower right hand part of the screen includes a control which may be used to select the display of a reference graph By default the graph of the 1 test voltage in black and the reference graph in blue will be shown which will allow the linearity of the machine to be checked Ideally this graph will coincide with the first test voltage current graph the more it deviates from this graph the greater the non linearity If the position of this switch is changed the gma voltage graph will be shown in red instead of the reference graph This may be deduced by looking at the colour indicating the test voltage in the upper part of the screen 25 CURRENT TEST
40. d allow for performance by duly trained facility personnel without the need for specialists to be present It should not imply any risk for the equipment to be tested e It should not imply excessive downtime none at all if possible The data and results obtained should provide at least some information which may be immediately interpreted by the operator carrying out the test e It should be possible to store the set of data obtained on computer media such that it may be easily sent and more detailed studied by specialists who will obtain the maximum information from the data acquired and take the appropriate decisions through comparative studies against other cases In practice the tests consist of two equal tests each one lasting 32 minutes and performed one after the other Both are made up of two work cycles the charging or absorption cycle and the discharging or reabsorption cycle During the charging cycle which lasts 30 minutes an operator selected a step voltage which is applied between the short circuited phases and ground and the current through the insulation is measured On completion of the charging cycle application of the voltage is interrupted and the discharging cycle begins In this cycle the item being tested is short circuited and the discharge current is measured for 2 minutes When these cycles have been completed the current continues to be measured until the machine is fully discharged at which
41. d be disabled The complete test consists of two identical tests in time but with different voltages which are performed automatically To perform a test click the Test button on the main menu The program will be initialised This may take a few seconds during which time the message in Figure 5 4 will be displayed INITIALIZING Figure 5 4 Program initialisation message 34 liz 5 SOFTWARE DESCRIPTION This button is used to begin a new test regardless of the extent to which the program has been executed If a previous test was being performed this checks whether it has been saved and if this is not the case offers the possibility of doing so Figure 5 5 A4 SAVE Ea The test hasn t finished Do you want to save data Figure 5 5 Confirmation for saving of data prior to interrupting an unfinished test If a previous test is being analysed and this is interrupted nothing will happen unless a value has been changed in which case a screen such as the one in Figure 5 6 will be displayed A4 SAVE Ea a Do you want to save the test Figure 5 6 Confirmation for saving of changes performed during an analysis The first time a test is performed the serial number of the EDAIII connected to the PC will be requested Figure 5 7 being this located on the nameplate 6 on the rear panel This will allow a record to be kept of the tests performed with each one 4 MFR NUMB
42. e equipment e asoft dry cloth if the equipment is not particularly soiled e acloth soaked in a neutral diluted cleaning product if the equipment is very dirty or has been in storage for some time After checking that the shell has completely dried use a soft dry cloth to clean ATTENTION Never use alcohol or any other abrasive product to clean the shell it may cause damage or decolouring 86 lis 6 EQUIPMENT MAINTENANCE 6 2 Care of cables The EDAIII equipment is capable of providing very high voltages as a A result of which THE CABLES SHOULD BE IN PERFECT CONDITION TO AVOID THE DANGER OF ELECTRIC SHOCKS OR ERRORS OR INACCURACIES IN THE MEASUREMENTS Both the wiring and its condition should be periodically checked with a view to detecting and anticipating any deterioration or breakage that might cause situations of danger for the operators and or malfunction of the equipment If the wiring is damaged the equipment should be sent to an authorized technical service for repair or new cables should be purchased see chapter 8 The same is applicable to the cable and unit connectors The cables should not be trodden on or moved during measuring since alterations may occur especially in the case of very low current values 87 lis 6 EQUIPMENT MAINTENANCE 6 3 Check of high voltage cables A To check the HIGH VOLTAGE cable they should be disconnected so of the unit like of the equipment under test
43. e left advanced part are the capacity measures which can be rectified manually by means of the keyboard 2 In the right advanced part are the voltage of test selected by the user which also can be modified later Also test SHORT or NORMAL in first and second voltage of test can be selected Later we will define as it is test SHORT 3 In the central part the parameters of the test SHORT EDA 4 In the inferior central part measures of temperature and humidity can be observed also the temperature of the winding introduced by the user 5 In the inferior part we have the commands to advance of screen to back down to cancel the measures or to validate them with the same functionality that in all the screens The measurements can be repeated by clicking the ES A button which appears in the lower part of the screen and then selecting the measurement to be repeated Figure 5 35 Alternatively the data may be manually introduced in the measurements screen Figure 5 34 T Temperature Humidity Test Voltages Figure 5 35 Selection of measurements to repeat e Test EDA SHORT TEST MODE Short When we select the type of test SHORT A software decides by itself depending on 2 configuration variables when the machine is loaded sufficiently like cutting the LOAD process and beginning with the REABSORPTION Of this form we can gain time in most of the machines It is necessary to notice that the calculated parameters
44. e test Figure 5 46 Confirmation for saving of changes performed during an analysis 63 lis 5 SOFTWARE DESCRIPTION 5 3 1 Test file selection Clicking this button and as long as there are test in the X xxxxx Data directory the test search utility in Figure 5 49 appears A4 TEST SEARCH ES MANUFACTURER UNIRAVIS m MACHINE TYPE Hydroelectric alternator v r Search Test fe Auto Ps CE Manual gt is E x fe Mfr Number f Manufacturer and Mach type fe 1sty 2nd SELECTFILE CANCEL Figure 5 49 Search for test to be analysed To initiate the search the first thing to be specified is the type of test previously performed on the machine in other words whether the test has been incomplete up to the 1 voltage or erroneous neither the 1 or second voltage has been completed From here on the search may be performed either by manufacturing number or manufacturer and machine type If the search is performed using the manufacturing number there is an option for manual or automatic searching If automatic a menu will appear when this control is activated showing the numbers of the machines on which the type of test selected has been performed and the rest of the fields are filled in automatically If the search is manual the number has to be input and if any test on the machine is found the rest of the fields have to be filled in if no such test is iden
45. elected click the E button and the file selector Figure 5 41 will appear where the operator can select the test to be analyzed EDA Y Directoy D EDANDataNALHABB 123 History Busearen CX ALHABB__123 Ej ES IEDAALHABB 1230 EDAALHSBB__123 1 Nombre de archivo Archivos de tipo All Files Cancelar Figure 5 41 File selector for test performance with 2 voltage Once the test has been selected it is loaded into memory by clicking twice the file name or by clicking the Load button Before doing this the program checks that it is actually an EDAIII file If this is the case it is loaded into memory otherwise it informs that the file is incorrect Figure 5 42 and offers the possibility of selecting another Figure 5 41 A4 ERROR Incorrect Selected file RA OK Figure 5 42 Warning that selected file does not correspond to EDAIII On completion of the second part of the test regardless of whether it is the continuation of an incomplete test or a test performed without interruption from beginning to end the method to follow will be the same the machine is left in the discharging process with a previous request for the TEST button to be released Nevertheless the operator is allowed to interrupt this process at any moment and end the test returning to the initial program screen as explained in section 5 2 5 61 lis 5 SOFTWARE DESCRIPTION
46. ent to the term equipment Magnetic packet This is one of the elements formed by the electromagnetic coupling that transforms electrical energy into magnetic energy for this to be transformed in turn into mechanical energy rotating machines or again into electricity transformers Maintenance Set of technical and administrative activities aimed at conserving or restoring an Item under to conditions allowing it to perform its function Maintenance policy Strategy governing the management decisions of a maintenance organisation Mass The point of reference of an electrical circuit Modification Partial design change of an Item Non destructive test Test performed on a machine and applying a lower voltage than the maximum recommended Part Parts constituting a component gaskets bolts Partial discharges Disruptive electrical discharges short circuiting the insulation between conductors only partially as regards both time and electrical section 126 ee aed APPENDIX E GLOSSARY Permissible condition Permissible status of an item for a specific application This will never be lower than that required by the official technical regulations for the use in question Phase Each of the single phase currents making up a polyphase system This term normally includes conductors coils etc Power The product of the voltage applied to a circuit and the current circulating through it This is measured in watts W or in
47. erformed without authorization shall invalidate this guarantee which shall automatically be cancelled in such cases This guarantee shall be effective only for the original purchaser of the product and is non transferable in the event of resale Guarantee extensions and maintenance contracts are available for both the hardware and software Please request information from the sales department of the nearest representative see section 8 liz 1 INTRODUCTION 1 INTRODUCTION Gaining insight into the status of the windings of rotating electrical machinery is a complex problem due to the particular characteristics of such elements These particular characteristics may be grouped into two blocks e The performance of the insulating materials is affected by a number of parameters Some of these depend on the composition and structure of such materials such as their chemical composition physical characteristics homogeneity etc relating to the manufacturing process Others linked to the actual condition of the insulation depend on its history relating to phenomena such as surface contamination absorbed humidity cracking thermal cycle induced fatigue etc e Windings are extensive systems and have areas of different characteristics slot area heads connections etc with different demands made of them The presence of a localised defect in an otherwise perfect winding might be interpreted as a degradation of the characteristics
48. essential since if it is not entered the program will calculate its value from the machine voltage data in the following way Thickness of insulation mm 0 33 Machine voltage kV When all the necessary data have been correctly inserted the program will allow the next process to begin 44 lis 5 SOFTWARE DESCRIPTION 5 2 3 Connection This window checks for correct connection of the equipment to the machine to be tested The program checks the following points The EDAIII is turned on The computer and the EDAIII are connected by the serial cable The Test button is not pressed If it is the warning shown in Figure 5 13 will be displayed The machine to be tested is de energized and discharged FERE E Lx RELEASE THE TEST BUTTON a E Figure 5 13 Message for releasing the test button The program will show a screen Figure 5 14 warning the machine must be discharged If it detects that the machine is charged the discharging sequence will begin Machine discharging can be accomplished in two ways manually or automatically 4 CONNECTION Lx WARNING The Machine must be discharged Figure 5 14 Warning alerting operator the machine must be discharged 45 lis 5 SOFTWARE DESCRIPTION Automatic by default Discharging via the EDAIII to 20 of the last measured current DISCHARGE CURRENT nA A EMB A THE MACHINE IS DISCHARGING PL
49. ester Dielectric test with continuous voltage step Equipment EDA Manufacturer UNITRONICS Model EDAIII at which this declaration refers with the disposals of the following directives and applicable standards CE Marking directive DC 93 68 CEE Electromagnetic compatibility directive DC 89 336 CEE Applicable armonized standards UNE EN 50081 part 2 93 UNE EN 50082 part 1 92 EN 61000 3 2 95 EN 61000 3 3 95 EN 61000 4 2 95 IEC 1000 4 3 95 EN 61000 4 4 95 EN 61000 4 5 95 EN 61000 4 6 96 EN 61000 4 11 94 IEC 61326 1 97 Low voltage directive DC 73 23 CEE Applicable armonized standards UNE EN 61010 1 96 Authorised Signat Madrid May 17 of 2000 UNITRONICS S A U Plaza de Espa a 18 pl 99 ut 915 40 01 25 28008 MADRID Jairtie Carreras de la Fuente Manager Corporate seal CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espafia 18 9 fl off 9 di E 28008 Madrid SPAIN a VAT number ES A 28121572 f Tel 34 1 542 52 04 UNITRONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation tester Dielectric test with continuous voltage step T alenna YE A RA OE OPE TYRITTNOMATTIMC asc 1 1 TR A TTT bin CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espa a 18 9 fl off 9 ced 28008 Madrid SPAIN E VAT number ES A 28121572 Tel 34 1 542 52 04 UNITR
50. et 500 15 E 5 D i Reabsortion 500 current 1000 1422 1 1 1 1 U u l 0 4 8 12 17 21 25 29 32 time min Figure 2 1 Graphic showing the currents produced during a test 11 liz 2 DESCRIPTION OF THE MEASUREMENT METHOD Absorption current This arises from the migration of ionic impurities from the material towards the electrodes During this displacement the ions encounter discontinuities and accumulate thereon The accumulated charge is proportional to the current established and to the local variation in the characteristics of the insulation Consequently the absorption current is a measure of the total quantity of electricity bearing impurities inside the dielectric and gives an idea of the degree of microscopic heterogeneity of the insulating material This heterogeneity is a negative quality intrinsic to the binding material forming the dielectric and is aggravated by the electrical and thermal demands made to machine in service This fact is reflected in an increase in the absorption current for equal voltage steps during the different periods of machine lifetime Driving current This arises as a result of ions open to recombination on the electrodes Its value is closely linked to the value of the step voltage applied The driving current consists of the sum of two currents one internal in origin resulting from local or generalised degradation of the insulation and the other of external origin due to s
51. every connection Measurement cable has Follow measuring During the test the unit loses the communication cable s broken or moved recommendations Tested machine has a EDA III is working serious isolation oc deterioration propery The computer has enabled To disable antivirus antivirus or another software in execution screensaver and energy saving Table 7 1 Troubleshooting The number in brackets refer to Figure 3 section 3 3 e To contact an authorized technical service or send them equipment refer to section 8 95 liz 8 TECHNICAL SUPPORT 8 TECHNICAL SUPPORT When contacting our technical service please provide the following information Equipment model Serial number on rear panel Description of fault Name and contact telephone of operator in charge of equipment and a person responsible therefore 96 liz 8 TECHNICAL SUPPORT 8 1 Return for calibration repair If after reviewing chapter 7 Troubleshooting it is concluded that the equipment should be returned for calibration repair the following instructions should be adhered to 1 Copy and fill in the sheets shown on the following pages and attach to equipment 2 Package the equipment or accessories using an appropriate transport container When sending equipment for repair the most appropriate course of action is to send the complete equipment i e measuring unit PC and cables
52. h of UM2B equipment UM3B Transformer Winding Resistance Meter Figure D 4 Figure D 4 Photograph of UM3B equipment 119 lcs APPENDIX D OTHER UNITRONICS EQUIPMENT UMSB Short Circuit Impedance Meter Figure D 5 Figure D 5 Photograph of UM3B equipment RAFVDM Power Socket Supply earth detecting Figure D 6 Figure D 6 Photograph of RAFVDM equipment 120 lico APPENDIX D OTHER UNITRONICS EQUIPMENT EDA DIAGHELP Expert software of diagnosis for rotating machines Figure D 7 18 x Transverse Curren NoTrace 000 normal Trace Normal te Advanced Degradation Trace Figure D 7 Screen of the application Diag_Help EDA_TRENDS Expert software of trends for rotating machines Figure D 8 EDA TRENDS Trends Unitronics S A U 1 Figure D 8 Screen of the application Trends 121 electric APPENDIX D OTHER UNITRONICS EQUIPMENT ETP DIAGHELP Expert software of diagnosis for transformers Figure D 9 ETP DIAGHELP ledT DRTRPLAYBO582 edRDBTRDCOTRA2086 Site Name UNITRONICS Manufacturer COTRADIS Technical Site Laboratorio Function test Machine Type Transformador de Distribuci n Done by Victor MFR Number 20864 Date 05 06 03 TEST DIAGNOSTIC Circuit Overall Indicator Electric Circuit 1 Magnetic Circuit Geometric Circuit Dielectric Circuit Indications Die
53. he performance of a series of routine and easily performed tests which through the analysis of certain parameters provide sufficient information on the evolution of the whole When this analysis detects rapidly evolving situations or when values which might on average be considered hazardous are reached other more complex testing techniques are applied these possibly implying the unavailability of the machine over long time periods or even the possible existence of certain risks to winding integrity Figure 1 1 Photograph of a winding The objective of this type of maintenance is to gain an accurate insight into the actual status of an item of equipment or a component and depending on this status to determine the best course of action continue with normal operation impose certain limitations carry out an overhaul or repair or finally undertake replacement In other words the aim is not only to limit unnecessary actions but also to complete the level of information available on the actual status of the equipment such that a suitable decision may be taken liz 1 INTRODUCTION Predictive maintenance is applied with greatest success and most frequently to major items of equipment subject to complex phenomena of ageing or degradation and involving a large number of variables In most of these cases there are no formulas allowing the status of the equipment to be estimated as a result of which it is necessary to perform tests
54. ine power expressed in millions of watts VOLTAGE kV Rated voltage of the machine in thousands of volts RPM Operating regime of the machine in revolutions per minute TEST DATE Date test was carried out This cannot be modified INSTALLATION DATE Date of initial start up of the machine LAST TEST DATE Date of performance of previous test TOTAL RUNNING HOURS Total number of hours of operation of the machine HOURS SINCE LAST TEST Hours of operation of the machine since performance of the previous test A 5 SOFTWARE DESCRIPTION 23 03 1333 30000 Figure 5 12 Screen with the technical data of the machine being tested BINDER TYPE Type of binder material used by the machine for bonding of insulation INSULATION TYPE Type of machine insulation INSULATION CAT Maximum temperature that the machine insulation can withstand without degradation IP PROTECTION INDEX Index of protection according to standard UNE 20 324 If the machine being tested is an alternator this field will be disabled START TIMES BY YEAR Number of times that the machine has been shut down and restarted in one year INSULATION THICKNESS mm Thickness of the machine insulation expressed in millimetres 43 liz 5 SOFTWARE DESCRIPTION The only data that necessarily have to be input are VOLTAGE and THICKNESS OF INSULATION of the machine The thickness is not actually
55. its Permissible Condition for use Corrective maintenance may or may not be scheduled Corrosion Destruction of a material usually a metal or of its properties due to reaction with a medium Current Movement of electrons between two points of a conductor due to the difference in potential between them Defect Alteration of the conditions of an Item of sufficient importance to cause its normal or reasonably foreseeable operation not to be satisfactory Degree of IP protection Method for classifying the degree of protection against dust water and impacts for electrical equipment Diagnosis Deduction of the nature of a failure based on the symptoms detected Drive Current Current originating as a result of ions susceptible to recombination on the electrodes Its value is closely linked to the value of the voltage applied 124 eee pe APPENDIX E GLOSSARY Emergency Maintenance Corrective maintenance that needs to be performed immediately in order to prevent serious consequences Equipment Complex unit of a higher order made up of assemblies components and parts grouped to form a functional system Equivalent to the term machine Failure Loss of the capability of an Item to perform its specific function Equivalent to the term breakdown Fuse Device protecting apparatus against overload conditions and short circuiting It contains a conductor of small cross section that melts in the event of an excessively intens
56. ity known as Remarks where the operator may jot down notes and or event occurring during the test using a maximum number of 25 lines and 80 characters per line The button will be enabled whenever a test or analysis 1s being performed 4 REMARKS x CANCEL OK Figure 5 63 Test analysis remarks The information is saved within the test itself as a result of which it is not accessible from any editor but only from the program When the analysis of a machine is selected and observations have been made regarding a previous test or analysis on this machine clicking the Remarks button will show what was written at that time 776 lis 5 SOFTWARE DESCRIPTION 5 6 Saving a test The B button is used to save tests both complete 1 and 2 test voltages and incomplete ones 1 test voltage The button will be activated whenever there is a change in the data introduced in the program during both testing and analysis NOTE Even though this button is not clicked for recording on completion of a test the program will ask whether or not the recording is to be performed Figure 5 64 lt TO SAVE Es Do you want to file the test Figure 5 64 Confirmation for saving changes made during analysis TT lis 5 SOFTWARE DESCRIPTION 5 7 Printing reports The button located on the main application screen may be used to print test reports and graphs Selection of what is to
57. ive current Ground Point of zero potential Not to be confused with mass History Record of events breakdowns repairs and actions in general concerning a given Item Installation System integrated by items forming a functional unit for production or services Insulating material Material providing opposition to the current flow This is also known as dielectric material Insulation Substance of low electrical conductivity The current passing through it may be considered negligible Insulation class Classification criterion for insulating materials and depending on the maximum continuous operation temperature Thus for example insulation class A has a limit temperature of 105 C while the class F limit is 185 C Insulation resistance Resistance provided by an insulating material to the current flow measured in the direction in which insulation is to be ensured 125 ee pe APPENDIX E GLOSSARY Item System sub system installation plant machine equipment structure building assembly component or part that may be considered individually and that may be separately subjected to a revision or test Leakage Current Current passing through the insulation This is low in value LED Light Emitting Diode This is a diode which when polarised emits a light of a given wavelength Machine Complex unit of a higher order made up of assemblies components and parts grouped to form a functional system Equival
58. la Fuente Nueva 5 28709 San Sebasti n de los Reyes Madrid SPAIN Tel 34 91 540 01 27 Fax 34 91 539 81 00 URL http www unitronics electric com 104 lis 9 SPECIFICATIONS 9 SPECIFICATIONS Power requirements depending on version 230 Vac 10 50 60 Hz 5 115 Vac 10 50 60 Hz 5 Maxim consumption 115 Vac 230 Vac Table 9 1 Table of consumed power according to used electrical net Technical characteristics Tabla 9 2 Technical characteristics 105 9 SPECIFICATIONS 500 mA T 250 Vac 20x5 Rear panel 115 V 50 Hz 250 mA T 250 Vac 20x5 1 25 A T 250 Vac 20x5 115 V 60 Hz 1AT 250 Vac 20x5 Rear panel 230 V 50 Hz 630 mA T 250 Vac 20x5 230 V 60 Hz 500 mA T 250 Vac 20x5 800 mA T 250 Vac PCB 315 mA T 250 Vac PCB 315 mA T 250 Vac PCB Base board 315 mA T 250 Vac PCB 125 mA T 250 Vac PCB 50 mA T 250 Vac PCB 250 mA F 250 Vac PCB Microcontroller Capacitance 250 mA F 250 Vac PCB 250 mA F 250 Vac PCB meter High voltage 250 mA F 250 Vac PCB 4AT 250 Vac 20x5 source Tabla 9 3 Fuses required All fuses must be homologated for 250 Vac 106 2AT 250 Vac 20x5 bec Technical specifications 9 SPECIFICATIONS Current measurement Voltage measurement Insulation measurement 5kV Capacitance measurement ac dc 50
59. lectric Degradation No trace Abnormal Aging No homogeneous aging traces Abnormal Insulation Resistance No trace Insulation State Very weak state traces Danger Partial Discharges Traces Presence in solid insulation Unitronics S A U 3 Figure D 9 Screen of the application Diag_Help ETP_TRENDS Expert software of trends for transformers Figure D 10 FE ETP TRENDS GRAPHIC ANALYSIS etp T Insulation Resist 1 20 F v windi SYST EM T Tums Ratio T Excitation Current al TR Error Polarization Index Time Constant y o tn m Short Circuit Imped Ohms w 18 27 09 96 07 04 97 28 10 97 15 04 98 07 10 98 21 0499 08 11 93 05 05 00 16 10 00 25 04 01 M PhaseV M Phase W TestDales DD MM YY KV Smoothing 4 J Tap Number Unitronics S A U d Figure D 10 Screen of the application Trends 122 eee ied APPENDIX E GLOSSARY APPENDIX E GLOSSARY The terms habitually used in relation to the equipment are listed below along with a definition corresponding to this particular field of work Absorption Current Current originating as a result of the migration of the ionic impurities in a material towards the electrodes Alternator Set of apparatus combined to transform kinetic energy into an alternating current Assembly Functional unit forming part of an Item and made up in turn of components engine turbine Availabili
60. lowing these steps Turn off the EDAIII Remove the clips from the equipment being tested Remove the cables from the EDAIII 29 li 4 PREPARATIONS BEFORE USE In order to remove the cables from the unit it is not enough to pull them but the safety nut of the connector Figure 4 3 must be anticlockwise turned So the cable can be only removed from the EDAIII when this safety nut is in the rear limit of the connector the nearest to the cable Any attempt to remove the cables without following this step could damage the unit Figure 4 3 Detail of the connector of the high voltage cables 30 lis 5 SOFTWARE DESCRIPTION 5 SOFTWARE DESCRIPTION 5 1 Introduction The EDAIII forms along with another series of units with their respective applications to see Appendix B a system to make tests and analysis of electrical machine Therefore all these applications are going away to send from menu common call System of Tests and Electrical Analyses of Machines Figure 5 1 that is in the folder of the same name in Beginning Programs E TEST AND ANALYSIS SYSTEM OF ELECTRIC MACHINES Applica tions Men u ROTATIVE MACHINES TESTS EDA Ill DIAGNOSTIC a A Unitronics SA Figure 5 1 Screen of menu of application In this screen they appear all the tests that can be made on the different machines and or components If some of the options appears disable is that the client does
61. mage to the equipment or to persons if the appropriate precautions are not taken 1909001 UNITRONICS S A U is an ISO9001 certified company C The equipment meets the requirements of the EU Directives EDAIII Electronic Dielectric Analyzer User manual June 2008 Six Edition EDA3 User Manual V3 0CE doc Copyright 2008 UNITRONICS S A U All rights reserved No part of this manual may be reproduced without authorization The contents of this manual may be changed without previous notification rm sonam GUARANTEE All equipment produced by UNITRONICS is covered by a standard guarantee of 12 months as from the date of delivery to the client The guarantee is for material and workmanship defects The obligation UNITRONICS shall be to repair or replace defective products throughout the guarantee period The guarantee covers the equipment but it is not applicable to accessories cables etc In order to benefit from this guarantee the purchaser should notify UNITRONICS or the nearest representative of any defects prior to expiry of the guarantee period This guarantee does not cover defects faults or damage caused by incorrect use or inadequate maintenance by the purchaser or unauthorized modifications or use outside the specifications Neither does the guarantee cover faults caused by natural disasters including fire flooding earthquakes etc Any opening of the equipment modification repair or intent to repair p
62. med previously on this machine when any of these fields are filled in the program will automatically fill in the rest case of MFR NUMBER or will limit the number of possible cases see also sections 5 2 6 and 5 3 1 With the data entered in the template the program will generate a directory with the following structure C SAGEN_WIN Ensayos TTTFFFFFNNNN where TTT Type of machine 3 letters Hydroelectric alternator ALH Thermal alternator ALT Low voltage motor MOB Medium voltage motor MOM Direct current motor MCC FFFFF Manufacturer s code 5 characters The first 5 letters of the manufacturer s name If this name has less than 5 letters it will automatically be filled with underscores to complete the 5 characters If the name inserted contains certain characters V these will be automatically replaced when creating PC files but not what the operator sees for the following characters Alt Gr 6 Alt 225 Alt 230 Alt 231 Alt 221 Alt 244 Alt 21 gt AZ wm Tr D i NNN Manufacturing number up to 243 characters Machine identifier 39 liz 5 SOFTWARE DESCRIPTION For example the tests performed on the direct current motor 123456 of the make Uniravis will be saved in the subdirectory C SAGEN_WIN Tests TRVUNIRA 1234561 and those for the hydroelectric alternator 654321 of the make ARK in the subdirectory
63. n completion of the capacitance ambient temperature and humidity measures the program requests the winding temperature Figure 5 30 This temperature should be input by the operator and should match with the indication provided by the machine sensors if available and not with the temperature of the shell If the machine is fitted with heating resistances the winding will be some 3 5 C above the ambient temperature AS WINDING TEMPERATURE x ee INPUT THE WINDING TEMPERATURE Figure 5 30 Screen for introduction of winding temperature 5 liz 5 SOFTWARE DESCRIPTION The operator should then enter the voltages at which the test is to be performed Figure 5 31 If these values are not introduced the test cannot be performed These voltages may subsequently be modified in the test window as explained in section 5 2 5 f INPUT THE TEST YOLTAGES Recommended maximum voltage 6000 Y FIRST TEST VOLTAGE v 2500 SECOND TEST VOLTAGE V 5000 Figure 5 31 Screen for introduction of test voltages The 2 test voltage may be the same as or higher than the 1 If this condition is not met when the voltages are entered the program will display the error message in Figure 5 32 4 lt ERROR Lx Second test voltage must be higher than first one Figure 5 32 Warning that 2 test voltage should be higher than 1 To avoid the risk of failure of the winding to be measu
64. n on the front panel is pressed the operator is instructed to release it before beginning the test Figure 5 38 CAES Ea RELEASE THE TEST BUTTON a E Figure 5 38 Warning to release the test button To start the test the test button on the front panel is requested to be pushed Figure 5 39 and the charging cycle of the first test will then begin Activating the test button constitutes the starting point for the 30 minute counter that is the duration of the test plus 2 minutes for reabsorption At the same time which the current graph is drawn one is going away to be drawing the one of the isolation resistance graphical advanced right of Figure 5 41 57s li 5 SOFTWARE DESCRIPTION A TEST Lx PRESS THE TEST BUTTON a z Figure 5 39 Warning to push the test button During the test we can observe the E3 button enabled with which we can abort the LOAD process at any time to go to REABSORPTION process This option is useful when option SHORT EDA has not been selected and it is desired to shorten the time of load of manual form according to criterion of the user During testing the test may be interrupted at any time in two ways e Clicking the D button shown in the lower part of the test window e Pushing the test button on the front panel of the equipment Apart from these two emergency stops which are an operator decision there is an automatic emergency stop that occ
65. of the entire assembly in view of the foreseen evolution of this type of insulation But such defects may give rise to failures However if the defect would have been perfectly identified there would still be the difficulty of issuing a forecast of the probability of failure since this would depend on the area in which the defect were located It is not the same for example for the defect to be located in an area close to the phase terminal as it is to have it close to the neutral A reflection on the particular characteristics indicated above is the fact that there is currently no single type of test available which is capable of exactly defining the status of a winding As a result it is not possible to estimate the probability of a failure or exactly forecast its remaining lifetime With a view to gaining greater insight in this respect various techniques have been developed using different types of tests and analysing very different characteristics or parameters Almost all of them have a peculiarity the absolute values of the parameters measured are not usually sufficiently indicative for evaluation of the results providing their evolution better information on winding status Consequently it is of great interest to memorise the results and incorporate them into databases allowing for correlation li 1 INTRODUCTION This leads to the definition of a predictive maintenance policy consisting of scheduling with a suitable frequency t
66. oltage step Equipment EDA Manufacturer UNITRONICS Model EDAIII at which this declaration refers with the disposals of the following directives and applicable standards CE Marking directive DC 93 68 CEE Electromagnetic compatibility directive DC 89 336 CEE Applicable armonized standards UNE EN 50081 part 2 93 UNE EN 50082 part 1 92 EN 61000 3 2 95 EN 61000 3 3 95 EN 61000 4 2 95 IEC 1000 4 3 95 EN 61000 4 4 95 EN 61000 4 5 95 EN 61000 4 6 96 EN 61000 4 11 94 IEC 61326 1 97 Low voltage directive DC 73 23 CEE Applicable armonized standards UNE EN 61010 1 96 Authorised Signat Madrid May 17 of 2000 UNITRONICS S A U Pozo de Espa a 12 pl 9 ut 915 40 01 25 28008 MADRID Jairtie Carreras de la Fuente Manager Corporate seal v PC Based on processor Pentium or superior 112 bin CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espa a 18 9 fl off 9 ced 28008 Madrid SPAIN A E VAT number ES A 28121572 Tel 34 1 542 52 04 UNITRONICS Fax 34 1 542 78 96 We declare on our own responsability the conformity of the product Instrument Isolation tester Dielectric test with continuous voltage step Equipment EDA Manufacturer UNITRONICS Model EDAIII at which this declaration refers with the disposals of the following directives and applicable standards CE Marking directive DC 93 68 CEE Electromagnetic comp
67. otograph of the unit MM00 Rigid transport case with reinforced external protection and interior cushioned with high density foam rubber Figure 3 3 Photograph of the transport case 15 liz 3 EDAIII EQUIPMENT Shielded serial cable with DB9 terminal connectors for CRS23200 communications between the PC and the unit Figure 3 4 Photograph of the serial cable RS232 8 meter shielded cables for high voltage measurement with wide M8A TOL opening clips at one end and high voltage connectors at the other The polarity is indicated by the colour of the clips red for positive and black for negative Figure 3 5 Photograph of the high voltage cables 16 liz 3 EDAIII EQUIPMENT 12 meter shielded high voltage measuring cables with wide opening MDATOL clips at one end and high voltage connectors at the other The polarity is indicated by the colour of the clips red for positive and black for negative BA00 Red beacon type lamp with same serial number as the unit Figure 3 6 Photograph of the warning beacon Mains strip with four power sockets protected against transient voltages differential currents and overcurrent conditions It incorporates a voltmeter for the direct verification of the power voltage and terminals for ground connections RAFVDM00 Figure 3 7 Photograph of the mains strip 17 lis 3 EDAIII EQUIPMENT SOFEDA3WXXX 1 CD with the equipment con
68. ou sure that you want to quit the program Figure 5 66 Confirmation for quitting the program If the process is continued the program checks that the EDAIII is turned off and otherwise informs of the need for this action Figure 5 69 SM EXIT x Figure 5 69 Warning to turn off the measurement unit If a test has been performed correctly using the first voltage or both 1 and e voltages and has not been saved or if data have been modified during analysis the program will ask whether this information is to be saved and will show another dialogue asking whether it is to be saved to drive a Figure 5 70 24 SAVE x Do you want to save the test in drive A Figure 5 70 Message for saving the test in drive A 84 lis 6 EQUIPMENT MAINTENANCE 6 EQUIPMENT MAINTENANCE Given the special characteristics of the equipment IT SHOULD BE A REPAIRED ONLY BY AUTHORIZED TECHNICAL PERSONNEL As has been pointed out in previous sections in view of the special danger involved in handling high voltages with the equipment the maintenance A personnel in charge of repair adjustment and calibration should be duly qualified and suitably trained Opening of the equipment by non authorized personnel implies the expiry of the guarantee period The equipment does not include any internal elements requiring operator intervention and SHOULD NOT BE OPENED IN ANY CASE DUE TO THE SERIOUS DANGER OF ELECTR
69. p the equipment the following instructions should be followed in the order indicated references are included in brackets to the different elements on the panels in Figure 3 Rear view of equipment PC EDAIII EA i T Serial cable EQUIPMENT BEING TESTED Alternator Figure 4 1 Explanatory drawing of elements interconnection for testing Place high voltage cables parallel and nearest to avoid electromagnetic fields 25 lis 4 PREPARATIONS BEFORE USE Connection between PC and EDAIII This is accomplished by means of the serial cable provided 12 Safety check A check should be made to ensure that the equipment to be measured is fully isolated from the external supply and fully discharged Connection of EDAIII high voltage cables to equipment being tested The high voltage cables should be connected first to the EDAIII unit 13 and then the other end should be left in the area of the machine to be tested In order to fasten the cables to the unit the safety nut of the connector Figure 4 3 must be clockwise turned until this nut is as close as possible to the unit When requested by the software the negative cable should be connected to the chassis or ground of the equipment to be measured and finally the positive to the active element phase s or other active element V maxim 6000 V I maxim 5mA Installation CAT II Before manipulating the cables the operator should be sure that
70. re 5 17 Equipment connection protocol ATTENTION It is very important for the correct operation of the equipment that all the conditions indicated in this window are met When the EDAIII unit is powered up the PC will undertake its initialisation showing the message that appears in Figure 5 18 during the process INITIALIZIN Figure 5 18 Message indicating the PC is initialising the unit 47 lis 5 SOFTWARE DESCRIPTION Once all the conditions are met the OK and NEXT buttons will be enabled When the later is pressed a check will be made to ensure that the EDAIII unit is ready for testing This may take a few seconds during which time the program will indicate that it is attempting to connect to the EDAIII Figure 5 19 CONNECTING Figure 5 19 Message indicating the PC is attempting to establish communications with the unit On the button bar in the lower part of the window is the icon vA which is enabled when the connection has been accomplished at least once or when a return is made from a later process This serves for a new verification of the correct connection between the EDAIII and the machine to be tested 48 lis 5 SOFTWARE DESCRIPTION 5 2 4 Capacitance temperature humidity measures Once the connection process has been completed and the machine has been verified to be discharged the program goes on to measure the capacitances temperature and humidity functions that EDAIII pe
71. rection Smoothing ho 20 C bo soc no Aves no ves Figure 5 61 Insulation resistance graph BACK OK PRINT 73 liz 5 SOFTWARE DESCRIPTION To determine which graph corresponds to which test these are different in colour The first test is depicted in black and the second in red as may be deduced from the colours indicating the test voltages and polarization indexes at the top of the screen If the decision is taken to show the smoothed graphs these will change colour the back becoming pink 1 voltage and the red becoming blue o voltage 74 lis 5 SOFTWARE DESCRIPTION 5 4 Test copy assistant In view of the number of files involved in a test and in order to facilitate the work of the operator as regards file storage the program incorporates a utility that allows the tests to be copied to a location different from that originally used by the program The source and target directories may be hard disk floppy disk or network drive When the a icon is clicked Figure 5 62 appears Source dAEDANDate ALHUNIRAB8544E DAALHUNIPA68544 0 Cd Target mamarcos mamarcos_red ETP E A DX l CANCEL OK Figure 5 62 Test copy assistant Source is used to select the name of the test file to be copied and Target to select the directory in which the test is to be saved 75 lis 5 SOFTWARE DESCRIPTION 5 5 Remarks page The program also incorporates a util
72. red non destructive testing the program provides information on the maximum recommended voltage to be applied This maximum recommended voltage is based on the following standard The test voltage should be lower than the operating voltage of the machine multiplied by 1 6 divided by root 3 as a conversion factor from alternating to direct current bm V V operation KV x 1 6 x un J3 52 lis 5 SOFTWARE DESCRIPTION Therefore a maximum test voltage is recommended but the operator is not limited to performing the test at a lower voltage than the recommended Nevertheless if a voltage higher than the recommended is introduced the program displays a warning message Figure 5 33 but allows the test to continue WOULD BE LOWER THAN gt TO AVOID RISKING THE MACHINE TEST VOLTAGES Figure 5 33 Warning that test voltage is higher than recommended If any measurement is incorrect or has been cancelled the incorrect or unmeasured data will be shown in a red frame indicating that there is an anomaly in this parameter When all the data are finally completed these are shown on screen and the OK and NEXT buttons are enabled Figure 5 34 53 5 SOFTWARE DESCRIPTION Figure 5 34 Screen for measurement of machine capacitance ambient temperature and humidity 54 lis 5 SOFTWARE DESCRIPTION In this screen 5 differentiated parts can be observed 1 In th
73. rforms automatically Furthermore this screen is used to insert the test voltages for the two tests Before initiating the measurement of the machine capacitances the cables are calibrated by placing them in an open circuit configuration as requested by the program Figure 5 20 This calibration is performed in order not to include the capacitance of the cables in the machine capacitance since a high degree of accuracy is required The cables should be laid as close as possible to the configuration they will have during measuring since the capacitance is not the same for them to be stretched out or rolled 5 CALIBRATION Ea OPEN CIRCUIT THE TEST CABLES Figure 5 20 Message for putting the measuring cables in open circuit If after clicking OK the program detects that the cables are not in open circuit it communicates this error Figure 5 21 which might be due to e the cables are not in open circuit there may be a short circuit or they may be in contact with the ground e malfunction of the unit ERROR A N Be sure the test leads are opened f the test leads are opened the equipment could be damaged X El ICANCEL OK Figure 5 21 Error message indicating cables are not in open circuit 49 liz 5 SOFTWARE DESCRIPTION After checking that the cables are in open circuit the program begins calibration showing the message in Figure 5 22 while
74. s the possibility of selecting another Figure 5 50 Figure 5 51 Warning that the selected file does not correspond to EDAIII 65 liz 5 SOFTWARE DESCRIPTION 5 3 2 Technical data of motor alternator Once a test has been loaded the program will present a screen with two tabs in its upper left hand part Technical Data and Measures Under the Technical Data tab there is a screen Figure 5 52 showing data identifying the test in the upper part and technical data of the machine in the lower For more information on the meaning of these data refer to section 5 2 2 Although these data are purely for information purposes the operator may change them with the exception of the data identifying the test This condition is indicated by the background colour of the indicators if the background is yellow the field may not be modified if white the data may be changed This is the case for the entire analysis The name of the file being analyzed is shown in the lower part of the screen at all times 5 DATA INSULATION TEST e Figure 5 52 Screen with the technical data of the machine being analysed 66 liz 5 SOFTWARE DESCRIPTION By clicking the Measures tab the program will show the measurements made during test ambient and winding temperatures relative humidity and machine capacitance as well as the test voltages and the currents measured at different times Figure 5 53 With respect
75. ses of previous tests The first time the program is started a configuration utility will appear Figure 5 3 This may be used to select both the voltage and frequency of the mains as well as the date format the unit of temperature the unit of length and the language Control Date C AT MIO 16L 9 fe DD MM YYYY f RS 232 COM1 y C MM DD YYYY Language Temperature fe Centigrade C Fahrenheit F Length French Meter m f Inch in Power Supply German 230 y v 50 v Hz Spanish 4 English Italian Figure 5 3 Program configuration screen 233 lis 5 SOFTWARE DESCRIPTION 5 2 Performing a test The measurements performed using the EDAIII system are OFF LINE Consequently before beginning the test A CHECK MUST BE MADE TO ENSURE THAT THE SYSTEM IS WITHOUT VOLTAGE IMPORTANT On executing the program and prior to performing any operation it is checked that there is no voltage applied and that the front button is released So the EDAIII should be connected to the PC via the serial cable but THE UNIT SHOULD NOT BE TURNED ON UNTIL THIS IS REQUESTED BY THE SOFTWARE No operation should be performed on the unit until the program checks that everything is in order To work with the EDAIII software the PC screensaver should be deactivated and the low consumption mode disabled Neither it should be executed another application and the antivirus shoul
76. sing during transitory machine regimes electrodynamic stresses resulting from direct asynchronous start ups in reversible groups etc These negative agents that affect windings may have a double consideration certain of them are reversible in nature for example external contamination while others cause permanent degradation of the dielectric It should be pointed out that a reversible situation might become irreversible if prompt action is not taken liz 2 DESCRIPTION OF THE MEASUREMENT METHOD 2 DESCRIPTION OF THE MEASUREMENT METHOD 2 1 Philosophy of the method The EDAIII is an automatic system designed for the performance of detailed analyses of dielectric status in rotating machines It is designed for use as a predictive maintenance system for which it meets the following requirements Automatic measuring system For the prevention of errors due to acquisition handling and correction times resulting from the environmental and machine conditions at the time of measuring e Repeatability of measurements This guarantees that the readings performed over a period of time have been obtained in the same way and with the same degree of accuracy and tolerances This allows the study of the evolution of such measurements Automatic organised storage of results This greatly simplifies the handling of the large amount of information obtained e Updateable system Developed such that new software developments may be implemen
77. t cut the load process nevertheless if the slope is 5 96 it would cut because the difference in between 104 nA and 100 nA is 4 Let us suppose that software decides to cut the process of LOAD in minute 23 of test then it would expect until minute 25 multiple of 5 and in that point software would go to the REABSORPTION process Second example In the example of the figure we can 4195 observe how the current curve has been evolving until arriving at minute 16 and then it 3999 pe E iz EM Window 5 min from is verified that the curve within last the 5 3000 minutes window 11 16 it becomes flat currying out that the current between minute 16 1000 nA and minute 11 1026 nA is smaller of 3 and therefore software will cut the process of LOAD in minute 20 to go to the 1000 O REABSORCION process 2500 gt 2000 1900 A 12 46 Current nA Time minutes Figure 5 36 Test example SHORT EDA 56 liz 5 SOFTWARE DESCRIPTION 5 2 5 Testing with 1 voltage In this section the test is performed at the 1 voltage The first thing the program does is to check for the correct configuration of the system and then shows the voltage at which the test will be performed this voltage may be modified in this window Figure 5 37 TEST VOLTAGE Figure 5 37 Warning that test is to be performed with previously introduced voltage If the test butto
78. t of a machine RPM Revolutions Per Minute This indicates the working regime of the machine Scheduled Maintenance Preventive maintenance carried out at previously determined intervals of time number of operations distance etc Short circuit The joining of two points subjected to different voltages via a very small resistance bridge The current reaches its maximum value Spare Part component assembly equipment or machine belonging to an Item of higher order and susceptible to replacement due to breakage wear or consumption Stator Fixed part of a rotating electrical machine inside which rotates the rotor Test Check performed on an item to assess one of its characteristics Transformer Device able to modify to its output the alternating voltage input level It also provides galvanic isolation between input and output Vibration Oscillating movement with respect to a reference position of the particles of a solid body Voltage Difference in potential between two points This is measured in volts V Winding Current conducting part of a machine 128
79. t the environment is appropriate without rain or dust storms and within the temperature humidity ranges specified for operation see chapter 9 Specifications A Check that the power voltage is within the specified operating limits see chapter 9 Specifications and that it has grounded connection this ground should match with the one of the equipment being tested If not sure the best thing is to connect a thick twisted mesh grounding cable from the system power source to the equipment being tested e Check that no voltage is connected to the equipment to be tested e Place the measuring unit and the control computer near the equipment to be tested as shown in Figure 4 1 e Place the Warning lamp close to the connection with the equipment being tested in order to ensure an indication of danger in the working area during measurement e Isolate the area where the equipment is being tested by means of the mechanical safety elements homologated by the safety departments of each company such as cones enclosures safety bands with coloured safety warnings at waist height etc 2 24 lis 4 PREPARATIONS BEFORE USE 4 2 Connection of equipment In view of the danger that this equipment might pose THE SEQUENCE INDICATED BELOW SHOULD BE ADHERED TO IN ALL CASES For the performance of tests the measuring unit and the control computer should be located close to the equipment to be analysed as indicated in Figure 4 1 To start u
80. ted as they arise using the same items of hardware e Acquisition of key parameters This automatically calculates a list of parameters and graphics for diagnosis of machine status e Non destructive testing If handled properly there is no risk of damage to the insulation during testing 10 liz 2 DESCRIPTION OF THE MEASUREMENT METHOD 2 2 Winding response to a voltage step When in an alternator winding one or several phases are kept isolated and the others are short circuited and grounded the equivalent circuit is a capacitor with a high value resistor in pararell The capacitor is defined this way one of the plates is the set of short circuited and ground isolated the other one is formed by the magnetic package and the dielectric is the winding insulation If under these conditions a direct current voltage step is applied between the isolated phases and ground a current step is established which evolves as follows e Initially a high current is established that decreases exponentially disappearing within approximately a thousandth of a second This current is the charging current of the aforementioned capacitor and its value and evolution over a period of time is of no outstanding significance e Subsequently the circulating current may decompose to give a constant driving current I4 and an absorption current I which decreases over a period of time 1876 Driving and absortion 1500 current 1000 ET er
81. the test this output will be activated and a load of up to 100W may be controlled Ambient temperature and humidity sensors box Female DB9 connector for serial communications with PC Connectors for high voltage cables There are various luminous indicators on the front panel of the EDAIII measurement and control unit these being detailed below 20 lis 3 EDAIII EQUIPMENT 1 Luminous test voltage indicator 1 This is a logarithmic graphic bar with 10 LED diodes which gives the operator an idea of the approximate voltage being applied It has a three colour code dividing the voltage margin from 100V to 6000V as shown in Table 3 1 It should be remembered that EVEN WITH THE INDICATOR TOTALLY OFF THERE MAY BE A VOLTAGE LOWER THAN 268V which is the lighting voltage for the first LED of the bar Colour of LED Output LED Voltage 10 6000 Red 9 4247 8 3007 7 2129 6 1507 Yellow 5 1067 4 755 3 535 Green 2 379 1 268 Table 3 1 Voltage corresponding to each level of the LED bar 2 Power on light 2 High luminosity red LED indicating that the EDAIII measurement switching unit is connected to the power supply and turned on In the event of high external luminosity look at the indicator head on to check lighting status DN li 3 EDAIII EQUIPMENT 3 Communication light 3 High luminosity green LED indicating that the EDAIII measurement switching unit is
82. tified the fields are left blank indicating that there is no test on this machine If the search is carried out by manufacturer and machine type this area is highlighted in a grey box and if these fields are clicked a menu will appear showing the machine manufacturers or types If when selecting one of these the manufacturing number is not filled in automatically it means that no test of this type has been performed on a machine having the characteristics selected If it is filled in there may be various machines with the selected characteristics and the one desired might be selected from among those displayed by clicking the manufacturing number tag 64 lis 5 SOFTWARE DESCRIPTION Once the machine to be analysed has been selected click the E button and the file selector Figure 5 50 will appear where the operator can select the test to be analyzed EDA Fr Directory CAT History DAEDANDataALHUNIRA68544 gt Buscaren C3 ALHUNIRA68544 E Nombre de archive JEDAALHUNIRA68544 0 Archivos de tipo fa Files 7 Cancelar Figure 5 50 Selector of file containing the test to be analysed Once the test has been selected it is loaded into memory by clicking twice the file name or by clicking the Load button Before doing this the program checks that it is actually an EDAIII file If this is the case it is loaded into memory otherwise it informs that the file is incorrect Figure 5 51 and offer
83. time a second identical test may be performed This second test differs from the first only as regards the voltage applied which should be equal to or greater than that used in the first test 35 liz 3 EDAIII EQUIPMENT 3 EDAIII EQUIPMENT 3 1 Description of product The EDAIII Electronic Dielectric Analyzer development is an integrated electronic unit designed specifically for the performance of complete insulation tests on the stator and rotor windings of low voltage LV medium voltage MV and high voltage HV equipment It is based on the measurement of simple parameters by means of a microprocessor and a computer application for calculations On completion of data acquisition the information available is sufficient for the diagnosis of the current status of the machine being tested as well as for evaluation of the trend curves The advantages characterising the EDAIII method may be summarised as follows e minimum risk for the machine e reduced unavailability times e simple performance high degree of test automation Figure 3 1 Photograph of EDAIII equipment 14 liz 3 EDAIII EQUIPMENT 3 2 Elements of the system The equipment can be supplied with the following elements and accessories NOTE XX nomenclature indicates different version according to equipment s features Please refer to sales department EDA3XX EDAIII measuring switching equipment with its serial number Figure 3 2 Ph
84. to obtain the values of different significant parameters and on the basis of these values make an interpretation Consequently their start up is linked to the definition and performance of tests and to the interpretation of their results For the first of these tasks it is essential for there to be in depth knowledge of the equipment and the techniques involved and for the second that specialist technical personnel be available liz 1 INTRODUCTION 1 1 Causes of winding ageing In shutdown situations the winding may absorb humidity During the next start up this humidity may be converted into bubbles of steam due to the heat generated this producing tearing of the layers of insulating material on certain occasions With the machine in service the stresses experienced by the winding are of four types e Electrical The stresses arising as a result of electrical gradients when the internal characteristics of the dielectric are unfavourable will cause partial discharges The demands made by external overvoltage conditions may in the most unfavourable cases cause direct perforation Thermal Overheating due to excessive loads insufficient cooling or the presence of hot spots in the magnetic package are factors that have a negative effect on insulations e Vibrations Demands potentially or actually causing displacement between insulation layers e Miscellaneous Contamination due to oil leaks overvoltage conditions ari
85. tray currents It is necessary to make a differentiation between the concepts of absorption current and driving current The absorption current reflects the current internal status of the dielectric a status that cannot be improved The driving current is usually most the result of external factors such as dirt humidity etc and is therefore open to modification Reabsorption current If DC voltage is held for a sufficient period of time the absorption current practically disappears The ionic impurities in the material remain fixed to the discontinuities of the insulation as a result of the effect of the electrical field Under these conditions if the direct current power is eliminated and the plates of the capacitor made up of the isolated phase s the insulation and ground are short circuited a current will appear in the opposite direction This is known as the reabsorption current and its evolution and value are identical to the absorption current This current originates from the recombination of the impurities displaced as a result of the action of the electrical field arising from the voltage initially applied This reabsorption current is easier to measure since it is not masked by the driving current which under these conditions is zero 12 liz 2 DESCRIPTION OF THE MEASUREMENT METHOD 2 3 Test characteristics The objective of the test is as follows e It should be simple to perform and to the extent possible shoul
86. trol software EDA3MUENXX The present user manual Cable for interconnection of the grounds of the power source and the en element being tested BEL00 Transportation bag for the measuring equipment Figure 3 8 Photograph of transportation bag CR00 Grounded power cable 18 lis 3 EDAIII EQUIPMENT 3 3 Physical description of the equipment Figure 3 includes a drawing of the EDAIII unit the upper part being the front panel and the lower the rear panel The function of each of the unit elements is described below Figure 3 9 Explanatory drawing of EDAIII unit Test voltage indicator This acts as a voltmeter indicating the 1 level of the test voltage by means of 10 LED diodes from 3 green through 4 yellow to 3 red Power on light This should light up when the connection switch 5 is activated 9 TA x 3 EDAIII EQUIPMENT 10 11 12 13 Communications LED While this is lit there is communication between the unit and the PC Test push button This activates the test to be performed An internal blinking light will indicate when this push button is pressed down Power on switch This is activated to connect the equipment to mains when the PC software indicates that this should be done Unit nameplate Mains input socket Unit power fuse 7 Fuse of the 10 Power for warning lamp showing test being performed siren When the operator presses the test push button 4 during
87. ty Capability of an Item to perform its function at a given time or over a given period of time under defined conditions and at a defined level of performance Binding material Substance used for attachment purposes In this case it is used to bond the insulation Breakage Breakdown that causes the unavailability of an Item Breakdown Loss of the capability of an item to perform its specific function Equivalent to the term failure Bridge Resistance of low value used to produce short circuits short Capacitance Physical property allowing electrical charges to be stored between two isolated conductors separated by a dielectric and subjected to a difference in potential Chassis Assembly of elements providing physical support for a system or item of equipment 123 eee ed APPENDIX E GLOSSARY Cleaning Elimination or reduction of dirt slag waste material rust or encrustations such that an Item operates under the best conditions of use Coil Assembly of conductive cross section in charge of performing inductive magnetic coupling Component Unit belonging to an assembly which is not generally operative by itself and is made up of parts turbine rotor bearing cylinder of an engine Conductor Material allowing an electrical current to flow continuously when subjected to a potential difference Corrective Maintenance Maintenance carried out on an Item once a breakdown has already occurred restoring it to
88. uA 5 mA 5 uA 50 uA 50 nA 5 pA lt 50 nA 50 lt V lt 500 5 1 d gito V gt 500 hasta 100 GQ 3 1 d gito 5 gt 100 GQ l nF 1 uF 50 5 3 d gito 1 uF 10 uF 0 50 C 10 90 5 30 C 10 75 5 55 C 5 80 Tabla 9 4 Unit specifications Outside this range the current measurement error doubles 107 5 1 d gito 2 1 C 10 liz 9 SPECIFICATIONS Other characteristics Control by microcontroller Power on indicator Indicator of communications between PC and unit Luminous test voltage indicator with 10 steps and 3 colours Warning light beacon of up to 100 W Relay control matrix for redirecting test voltages and selecting capacitance measurements Safety push button for high voltage injection Parameters used For each voltage Insulation resistance at 20 C Insulation resistance at 40 C Polarization index Time constant Leakage current Absorption ratio Absorption index Standardised leakage current at 20 C Standardised leakage current at 40 C Reabsorption current Reabsorption leakage current ratio Standardised reabsorption current at thickness Ratios Ratio of d c and 1 kHz capacitance Ratio of leakage currents Ratio of voltages Other calculations Ambient temperature Ambient relative humidity 108 bin CE CONFORMITY DECLARATION UNITRONICS S A U Plaza
89. ult continues contact an authorized technical service Send the equipment to an authorized technical service On starting program Test option or Test and Analysis options is disabled The hardware key is not in place Plug the key into the parallel port of the PC correctly oriented 94 7 TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION Install the program if s i buda p Not has installed the file of inserting the diskette key y p the diskette key when concluding the disabled installation again The serial cable is connected between EDAIII and PC but the Connection screen Section 5 2 3 indicates the contrary Serial cable is improperly connected Connect it properly Serial cable is damaged Contact an authorized technical service Serial port is not well configured Configure it well About gt Configure The equipment is broken down Send the equipment to an authorized technical service When switch on the unit it sounds an intermittent hoot Unit has be switched on with the pressed test button Take off the test button Fast peaks up down appear on current curves High voltages cables are in poor condition Check cables see section 6 3 If the fault continues contact an authorized technical service High voltage leaks to ground through the measure wire or through the connection between measure terminals Check
90. urs whenever unexpected voltage drops are detected during the test due to possible accidental short circuit conditions in the machine or to drops in the insulation resistance dielectric breakdown When this occurs the program will show the message in figure 5 40 In such cases with the test being interrupted during current measurement it is said that there has been an erroneous test and the data will be saved as though this were an incomplete test To continue the operator should click FOLLOWING on the test menu and select an error type file VOLTAGE DROP CHECK CONNECTION OF THE MACHINE AND DEVICES Ea DK Figure 5 40 Error message indicating voltage drop short circuit condition These emergency stops immediately interrupt the application of voltage to the output of the unit and the program informs the operator that he should release the TEST button if 58 lis 5 SOFTWARE DESCRIPTION this has not already been done Figure 5 38 At this moment the unit begins the discharging process explained above see section 5 2 3 Once voltage has been applied for 30 minutes the reabsorption cycle begins the source ceases to apply voltage and the machine being tested is short circuited On completion of the Qi p cycle machine discharge begins see section 5 2 3 At this moment ine ER and Fa button changes to and the test sequence may begin again In addition the data are saved to a temporary file
91. ustomer and what new levels of performance he would incorporate or remove thinking of future system hardware software improvements If you have any observation suggestion to make regarding the system software or hardware wiring operating procedures characteristics etc please photocopy and fill in the following two sheets sending them to the corresponding Sales Department 101 COMPANY Address City Contact person Telephone EDAIII serial No Date of purchase Degree of satisfaction O Very satisfied Fairly satisfied 8 TECHNICAL SUPPORT Client No Zip code Fax Satisfied Not very satisfied What safety elements would you incorporate What new calculations should it support Province e mail Dissatisfied Very dissatisfied 102 Wi D 8 TECHNICAL SUPPORT What standard optional elements would you add What elements would you remove What defects does the system have on of of Table 8 2 Survey form 103 lis 8 TECHNICAL SUPPORT 8 4 Commercial department and technical support UNITRONICS S A U Sales department UNITRONICS S A U Sales Department Avenida de la Fuente Nueva 5 28709 San Sebasti n de los Reyes Madrid SPAIN Tel 34 91 540 01 27 Fax 34 91 539 81 00 URL http www unitronics electric com Technical Service UNITRONICS S A U Maintenance Department Avenida de
92. volt amperes VA Predictive Maintenance Preventive maintenance based on knowledge of the status of an Item acquired through the periodic or continuous measuring of a significant parameter The maintenance intervention is conditioned by the prompt detection of the symptoms of the breakdown Preventive Maintenance Maintenance consisting of certain repairs or changes to components or parts on the basis of time intervals or certain criteria established to reduce the probability of a breakdown or loss of performance of an Item This is always scheduled Rack Box housing electronic equipment Reabsorption Current Current produced when short circuiting a charged machine Its evolution is similar to that of the Absorption Current but in the opposite direction It originates from the recombination of impurities displaced under the action of the electrical field created by the voltage initially applied Report Documentation resulting from the performance of a test Resistance Opposition of a conductor to the current flow This is due to the resistance offered by the atoms to the circulation of free electrons Rotating machine Set of apparatus combined to receive a certain type of energy and restore it to another more adequate form or to produce a given effect One of these forms will be kinetic energy There are therefore AC and DC generators and motors and rotating converters 127 ee pe APPENDIX E GLOSSARY Rotor Rotating par
93. w voltage directive DC 73 23 CEE Applicable armonized standards UNE EN 61010 1 96 Authorised Signat Madrid May 17 of 2000 UNITRONICS S A U Plaza de Espa a 19 pl 99 1M 915 40 01 25 28008 MADRID Jairtie Carreras de la Fuente Manager Corporate seal Y CD ROM drive 115 liz APPENDIX C SOFTWARE INSTALLATION APPENDIX C SOFTWARE INSTALLATION The documentation referred to the control software installation manual EDAIII can be found in file SETUP EDA ING 116 liz APPENDIX D OTHER UNITRONICS EQUIPMENT APPENDIX D OTHER UNITRONICS EQUIPMENT UNITRONICS provides a set of tools geared towards the predictive maintenance of electrical installations using common hardware and specific software applications for the performance of different measurement functions All the software applications that make up this set of tools have been developed by UNITRONICS with the idea of facilitating maintenance tasks Thus the different programs guide the operator throughout without the need to have in depth knowledge of computers Subsequently in the results and trends analysis phase it is the software itself that occasionally provides a direct initial basic evaluation of the tests performed At the same time and given the importance of correctly managing the data all the measurements made with this tools remains incorporated in a common database such that it is very simple to recover the tests performed on

EDA3 (Evaluación de Aislamiento)

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EDA3 (Evaluaci&oacute;n de Aislamiento)

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EDA3 (Evaluación de Aislamiento)