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Manual de la UM-3 - Unitronics Electric

1. 6 EQUIPMENT MAINTENANCE ETPRB WINDING RESISTANCE SITE NAME C T CASTELLON DATE 22 11 99 TECHNICAL SITE MACHINE TYPE Transformador de Potencia SERIAL NUMBER 79812 MANUFACTURER GENERAL ELECTRICA ESPANOLA FUNCTION T 2A1 T AUXILIAR MADE BY J M DEL RIO TYPE TPAV12000 25 MANUFACTURING YEAR REFRIGERATION Three phase Single phase POWER MVA Autotransformer NOM Vee VOLTAGE KV CURRENT A CONNECTION GROUP TYPE Tap Changer Tap Changer Tap Changer Selector Selector Selector No tap changer No tap changer No tap changer REGULATION Load Load Load Switch Switch Switch Below cover Below cover Below cover HANDLING NUMBER SWITCH TYPE MANUFACTURER TAPS NUMBER NOMINAL TAP CENTRAL TAPS NUMBER STEP V Figure 5 51 First page of report _ 69 egres 6 EQUIPMENT MAINTENANCE MEASUREMENTS h mm ss TEST DATE 22 11 99 MEASURE TOTAL TIME 1 15 20 TRANSFORMER TEMP MEASURED WINDINGS REFERENCE TEMP 75 0 High Voltage Low Voltage E Tertiary A LV INDING MEASURE PHASE RESISTANCE h mm ss wea fue fore J 206 SOO Figure 5 52 Second page of report _70 6 EQUIPMENT MAINTENANCE Transf T oC Ref T C MEASURE TIME WIND 0 55 08 PHASE RESISTANCE a F ai si Z r A A oe Spa nga S 10 11 12 13 14 15 16 TAPS
2. ee mourn 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 There are software applications that can help very much to the responsible of equipment evaluation in the interpretation of results Trends Evolution and Expert Diagnostic System see appendix C but the final determination is in the hand of the responsible and overall will come given of the hand of the experience sez 2 DESCRIPTION OF MEASURING METHOD 2 DESCRIPTION OF MEASURING METHOD 2 1 Philosophy of measuring method The UM3B system is an automatic system especially designed to carry out low resistance measurements on transformer windings It is designed for use as a predictive maintenance system for which it meets the following requirements e 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 e Automatic org
3. 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 In any case contact the technical service _ 88 8 TECHNICAL SUPPORT CLIENT DATA COMPANY Client No Address City Zip code Province Contact person e mail Telephone Fax EQUIPMENT DATA UMS3B serial No Date of purchase Date of last adjustment calibration Date of last revision repair Cause for return O Equipment calibration Calibration certificate required O Equipment reparation fill in only in case of a problem Is the equipment under guarantee O Yes O No Date of occurrence of fault Equipment fault detected Power LED does not light up O Fuses blown repeatedly There s no communication between unit and PC Communications cable with the PC deteriorated Cable hose deteriorated Equipment broken down Others _ 89 8 TECHNICAL SUPPORT Description of fault Materials sent Table 8 1 Sheet for calibration repair of the equipment _ 90 hese 8 TECHNICAL SUPPORT 8 2 Requests for spares Contact the Sales Department 3 Observations The UM3B equipment has been developed and tested under the same conditions and in the same installations in which the equipment will encounter during operation Nevert
4. VAmax Comm ns osseo Power H 6 g Figure 3 10 Explanatory diagram of UM3B unit 1 Cable hose connector for performance of measurement of the equipment being tested Power on light This should light up when the connection 2 l l switch 3 is activated 18 3 UM3B EQUIPMENT Communications LED While this is lit there is 3 communication between the unit and the PC 4 Power on switch This is activated to connect the equipment to mains when the PC software indicates that this should be done 5 Mains input connections socket Includes a fuse holder and spare fuse 6 Fan cooling of unit 7 PC communications connector 8 Plate with characteristics of unit A hose that ends in three cables blue yellow and red complements the UM3B There are two clamps for each cable which are connected to the corresponding terminal of the equipment being tested one for current thicker which is responsible for injecting the current into the winding and the other for voltage thinner which is for measuring the voltage at the terminal Voltaje oo Current clamp clamp Figure 3 11 Detail of cable hose clamps 19 Hb optgpice 3 UM3B EQUIPMENT The old clamps of current have been replaced in new hoses by a much more appropriate for the work in bushings of all type of power transformes Now their fixation is safer trustworthy and less harmful In addition the new clamp to see
5. regulator adjuster position the compound resistance between each of the phases is shown along with the simple resistance of each phase and the time employed in measuring ETPRB RESULTS TABLE era i ee x FILE cASAGEN_WINSEnsayos T RPUNIRAZSO64 ADBTRPUNIRAZSOB 4 H HIGH hd REF TEMP S 167 0 F TRANSF TEMP 65 0 COMPOUND RESISTANCE SIMPLE RESISTANCE Ss cc a BACE CANCEL PRINT GRAFH Figure 5 45 Display of results on the measuring of a winding with regulator adjuster If the number of regulation positions is larger than that which the program can show on a screen the buttons RE PAG and AV PAG are enabled thus enabling the user to move through the different pages Ep Hb optgpice 6 EQUIPMENT MAINTENANCE Although the resistance values cannot be modified manually the simple references may be referenced at different environmental or transformer temperatures This is accomplished using the arrows that appear in the upper part of the screen If the at button is pressed these same data are plotted on a graph Figure 5 46 in which the resistance of the winding phases is shown in relation to the regulator positions It is possible to select the phase to be displayed which will be plotted in the same colour as each phase in the selection box and whether simple or compound resistance 1s desired TAF CHANGER RESISTANCES REPRESENTATION E Phase g 0070 ease 0 068 RES
6. 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 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
7. INPUT DATA lf you select NO data file will be deleted Figure 5 6 Warning to save data entered Afterwards the program will check that the UM3B unit is working correctly and that this is properly connected to the PC unit by means of the serial cable The program then checks for the existence of incomplete tests considering as such those for which the test has not been completed The program offers the possibility of continuing with an incomplete test eliminating all the incomplete tests or beginning a new test Figure 5 7 237 hepp 6 EQUIPMENT MAINTENANCE Existing incomplete tests If pou want to carry out a new test press the button CANCEL or lt Esc gt If pou want to delete all the temporary files press the button DELETE or lt F3 gt If pou want to continue with the test press the button SELECT FILE or lt F1 gt x 8l CANCEL DELETE SELECT FILE Figure 5 7 Notification that there are incomplete tests 5 3 1 Test identification When the operator decides to perform a test the first thing to be done is to identify the transformer to be tested which will serve to name the file that will contain all the test data Test identification This identification is performed according to the following data as shown in Figure 58 TEST IDENTIFICATION DATA MFR NUMBER 28064 MANUFACTURER UNIRAYIS od MACHINE TYPE Power Transformer TRP od FUNCTION Test SITE Un
8. TTR R SELECT WINDINGS aW u Gf 424 31 45 SELECT WINDINGS a u aooo ooro ooo High Voltage w Ree el Ad Low Voltage M doud Ee as pet ba bt ba Figure 5 14 Configuration screen for measurement of a winding with regulator adjuster In TEST DATA section will be introduced the following data TRANSF TEMPERATURE Real temperature of copper s coil of transformer Enter the nearest to the real one the indicative clock oil the probe PtlOO or the measurement of the calibrated thermometer Always use the same measure agreement so that they be comparable in the time REFERENCE TEMP The resistance of the windings changes with the temperature with a known deviation Measures in different dates are usually made with different temperatures of the winding To compare in the time the measures of temperature measurements it is normal to refer to a reference temperature that can be entered by the operator The results of the measurement will be related to this temperature The shown correction is always for copper coils for the case of aluminum the deviations are not very big and they would depend on the alloy In the event that no winding has been selected and the user attempts to go on to a subsequent phase the program displays a message indicating the anomaly Figure 5 15 The _ 43 ihep 6 EQUIPMENT MAINTENANCE same occurs if a winding with a regulator or adjuster has been selected and no position has
9. UNITRONICS Model UM3B at which this declaration refers with the disposals of the following directives and applicable standards e 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 e Low voltage directive DC 73 23 CEE Applicable armonized standards a UNE EN 61010 1 96 Authorised Signato Madrid April 20 of 2001 s UNITRONICS S A U e Piozo de Espafia 18 pl 9 tit 915 400 25 28008 MADRID Corporate seal _Q8 sear APPENDIX B SYSTEM REQUIREMENTS APPENDIX B SYSTEM REQUIREMENTS The control software specifies the following requirements to its correct operation v PC Based on processor Pentium or superior v 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 v A Minimum of 16 MB RAM 32 recommended v VGA Color Monitor v USB Port 99 hese APPENDIX C CONTROL SOFTWARE INSTALLATION APPENDIX C CONTROL SOFTWARE INSTALLATION The documentation referred to the control software installation manual UM3B can be found in file SETUP_RB_ING 100 cee APPENDIX
10. been selected for measurement Figure 5 16 ERROR MESSAGE Select windings to measure please ERROR MESSAGE Select taps to measure in the TAP CHANGER OF THE HIGH Figure 5 16 Notification that no position for winding with regulator adjuster has been selected The Measurement section explains the difference between the two manners to perform a test automatic or manual _44 Hh optgpice 6 EQUIPMENT MAINTENANCE 5 3 4 Connection This window checks for correct connection of the equipment to the transformer to be tested Before carrying out any action you must ensure that the equipment to be tested is free from voltage ETPRB CONNECTIONS ba Be sure the machine under test has no voltage Connect the serial cable from PC to UM 3 unit Switch on the UM 3 unit CONNECT THE CLIPS WITH First all Current Clips Cable RED to the phase U A See Cable tot ephase Cable BLUE to the phase W A The system supply must have ground connection Otherwise the unit could be damaged or the test will be not correct Figure 5 17 Equipment connections protocol The program checks that the UM3B has been turned on and that the cable between the equipment and the computer has been correctly connected A screen appears with the connection instructions to be followed Figure 5 17 If the unit is not turn on OK and NEXT buttons are disabled Any errors in this start up protocol are shown by m
11. chosen in the configuration measurement mode If automatic mode was chosen the software will always start with the highest scale going down if considered appropriate for accurate measurement If manual mode was chosen the user must select one scale _47 Hb optgpice 6 EQUIPMENT MAINTENANCE Above the scale is a graphics bar entitled Itest which shows the evolution of the current absorbed by the transformer appearing in red above the bar In the center the resistances to be measured appear set to zero These are separated into two rows in the first the compound resistances are displayed and in the second and lower the simple resistances corrected to the reference temperature value The compound resistances are those that are located between two phases and are known by the name of such phases Thus R UV would be the resistance between phases U and V The simple resistances on the other hand are those that are located between each phase column of transformer in the star configuration they coincide with the existent ones among phase and neutral while in delta they are the independent of each phase and are known as RB followed by the name of the phase Thus RB U would be the resistance between phase U and neutral All this may be seen more clearly in Figure 5 20 UO A R UV i Aww SS Wr S WJ S O V e lt HUJ RUW Rw NK W S gt Figure 5 20 Explanatory diagram on the difference between simple and
12. compound resistance If the measurement were single phase resistances R VW R UW RB V and RB W would appear disabled indicating that in this type of measurement no such resistances exist In the lower left hand corner a clock is displayed showing the time that the measurement process takes for each position or winding In this section and in the event that the winding has a regulator adjuster the NEXT and PREVIOUS buttons change their function Instead of moving forward backward to other processes they move forward backward to other regulator positions without the need to measure these positions When in the first or last position of the regulator adjuster the PREVIOUS and NEXT buttons respectively recover their previous function In order to begin the measurement button _ J MEASURE has to be pressed In principle we are going to detail the steps that follow one to another until completing the measurement of the 3 phases and we are going to begin with three phase way of measurement that is to say the user will select ALL in the menu drop down PHASE Later we will see single phase way of measurement _ 4g Hh uptgpice 6 EQUIPMENT MAINTENANCE e Measurement in three phase way al selected option ALL in the PHASE pull down menu and pressed the button MEASURE if the winding has a regulator adjuster a screen will appear rank the position in which the regulator should be placed to start measuri
13. each cable proceed as follows 1 Disconnect the measuring cable at both ends 2 Check for continuity between the pins of the connector and the corresponding clamps in accordance with the table shown below One of the test points of the polymeter should be placed in contact with the pin of the connector and the other test point in contact with the metallic body of the corresponding clamp The polymeter should indicate continuity _79 Hb optgpice 6 EQUIPMENT MAINTENANCE 3 Check for discontinuity of each pin of the connector with respect to the rest of the pins One of the test points of the polymeter should be placed in contact with one pin of the connector and the other test point in contact successively with the rest of the contacts For each pin checked the polymeter should indicate discontinuity towards the rest of the adjacent pins 4 The aforementioned checks may be performed by the user but a check should also be made of dielectric rigidity and the maximum current tested These last two verifications may be performed only by the technical service Connecting pin Type of clamp Fase de medida Cable clamp colour V three phase 8 Voltage ____ X2 single phase 2 Current U three phase 9 Voltage ____ XI single phase 3 Current W three phase 6 Voltage Neutro three phase pias pS Mesh Notconnected Checking of the extension cable is much simpler and consists of verifying the connec
14. easily performed tests that through the analysis of certain parameters provide enough 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 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 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 to obtain the values of different significant parameters and on the basis of these values make an interpretation
15. 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 66 hepp 6 EQUIPMENT MAINTENANCE 5 6 Remarks page The program also incorporates a utility 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 Ea button will be enabled whenever a test or analysis is being performed REMARKS Figure 5 49 Testing analysis incident log 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 267 Hh uptgpice 6 EQUIPMENT MAINTENANCE 5 7 Printing reports Test reports may be printed from the button located on the main menu While this process lasts the program displays a message requesting the operator to wait WAIT A MOMENT PLEASE PRINTING Figure 5 50 Notification indicating that a report is being printed A report does not have a set number of pages It depends to a large extent on whether the transformer has windings with regulators adjusters or not If none of the windings has a regulator adjuster the report will
16. of ventilation of the unit neither the perforated lateral panels 6 If is observed that the ventilator is broken or turn with difficulty don t make a new test because the equipment could be result damaged 203 ssx 4 PREPARATIONS BEFORE USE 4 2 Connection of equipment Due to the potential danger implied by this equipment IT IS NECESSARY TO FOLLOW THE SEQUENCE DESCRIBED 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 up 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 10 pe os A CURRENT CLAMPS s VOLTAGE CLAMPS Sa lt HIGH VOLTAGE WINDINGS TESTED EQUIPMENT Figure 4 1 Explanatory diagram of the interconnection of components for a test _94 hse 4 PREPARATIONS BEFORE USE Connection of PC to UM3B This is accomplished by means of the serial USB conversor cable provided with DB9 connectors 7 Cable must be shielded 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 the cable hose to the UM3B The cables should first be connected to the unit 1 and the clamps then left in the area near to the equipment being t
17. previous figure is able to include greater bushings The rest of the indicators warnings appear on the computer screen and will be described in detail in chapter 5 Software description 20 hese 4 PREPARATIONS BEFORE USE 4 PREPARATIONS BEFORE USE The UM3B equipment is a high performance automatic system specialized in measurement of winding and regulator set resistance if applicable To perform this measurement the system uses the four wire method injecting a current signal of up to 20 Amperes These currents may induce high voltages in the tested equipment if the connection with the unit is interrupted for any reason This may cause serious danger to the operator if the manipulation is carried out of specifications 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 UM3B system are OFF LINE Therefore 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
18. t finished yet are you sure to exit NOTICE ADVISE DO YOU WANT TO SAVE INPUT DATA Figure 5 56 Message to save the data entered during the test s Tas Hb optgpice 6 EQUIPMENT MAINTENANCE If on the other hand an analysis was being performed and during this data have been changed the program will display Figure 5 57 when exiting the application NOTICE ADVISE DO YOU WANT TO SAVE INPUT DATA lf you select NO data file will be deleted Figure 5 57 Message to save the data modified in the analysis At the end the program reminds the user to turn off the measuring unit Figure 5 58 NOTICE ADVISE SWITCH OFF THE MEASUREMENT UNIT PLEASE Figure 5 58 Notification for the measuring unit to be turned off 5 10 Other error messages The different error messages that the unit can present are commented in the section 7 Troubleshooting The following ones are also Resistance bigger than the maximum range 1kQ Figure 5 26 Fickle resistance Figure 5 28 Possible open circuit Figure 5 23 Lost communication between the PC and the unit Interrupted communication between the PC and the unit The application software has been interrupted or the serial connector has _74 Hh optgpice 6 EQUIPMENT MAINTENANCE come unfastened or broken In some case the unit won t be able to continue with the test and will request the initialization Figure 5 59 ERROR MESSA
19. take up two pages otherwise there will be one extra sheet for each winding with regulator adjuster In the 3 following sheets the appearance of a report is shown On the first page is shown the identification and technical data on the transformer that has been tested Qn the upper part of the second page are shown the observations made during the test or analysis and in the middle a brief summary of the measurements that were made This consists of an indication of the temperatures to which the test is standardized the time the test lasted and the windings tested Displayed in the lower part is the result of the test on the windings without a regulator adjuster showing first the compound resistance followed by the resistance measurement unit the simple resistances in each phase and the time taken to perform the test on the winding if all have a regulator adjuster this information is not included On the third page and further pages if relevant are the results obtained for the windings with regulator adjuster The structure of the page is similar to a spreadsheet and each row includes the simple and compound resistance values for each of the regulator adjuster positions analyzed and the time employed for each At the end of the page there is a diagram of the simple resistance for each phase with respect to the positions analyzed There will be one sheet of this type for each winding with regulator adjuster tested 68
20. 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 101 sce APPENDIX D OTHER UNITRONICS EQUIPMENT D 1 Applications available EDAITI analysis of motor and alternator insulations Figure D 1 Figure D 1 Photograph of EDAITI equipment ETP complete transformer testing UMI1B Transformer Turns Ratio Meter Figure D 2 Figure D 2 Photograph of UMIB equipment 102 see APPENDIX D OTHER UNITRONICS EQUIPMENT UM2B Recovery Voltage Meter Figure D 3 Figure D 3 Photograph of UM2B equipment UMS3B Transformer Winding Resistance Meter Figure D 4 Figure D 4 Photograph of UM3B equipment 103 APPENDIX D OTHER UNITRONICS EQUIPMENT UMSB Short Circuit Impedance Meter Figure D 5 Figure D 5 Photograph of UM5B equipment RAFVDM Power Socket Supply earth detecting Figure D 6 Figure D 6 Photograph of RAFVDM equipment 104 sce APPENDIX D OTHER UNITRONICS EQUIPMENT EDA_DIAGHELP Expert software of diagnosis for rotating machines Fig
21. transformer WARNING Disconnection after the measurement In order that the accumulated magnetic energy in the transformer unloads appropriately when finishing the measurement before clearing the connections software waits for the double of the time that needed to magnetize in the measured equipment for example if it needed in a transformer high power 6 minutes will be expected 12 minutes before retiring the wiring since the last measurement finished To disconnect in the first place all the clamps of tension and soon to retire all those of current In transforming of more than 20 MVA the unloading can last several minutes therefore it is good practice of security to use rubber gloves to manipulate the connection clamps 54 Hb optgpice 6 EQUIPMENT MAINTENANCE For a reason of security to protect the unit the system will ask you to retire all the voltage clamps first before those of current when changing among windings high to low or to tertiary figure 5 32 or after finished the measures figure 5 33 WHEN YOU DISCONNECT CLIPS OF THE WINDING FIRST REMOVE ALL VOLTAGE CLIPS a Figure 5 31 Warning of change of wires among phases SWITCH OFF THE MEASUREMENT UNIT PLEASE When you disconnect clips first remove all voltage clips Qe Figure 5 32 Warning of remove the wires after measurements However if the program detects that the compound resistances obtained are not similar
22. utility in 40 SEARCH TEST MANUFACTURER UNIRAYIS od MACHINE TFE Power Transformer od Search by fe Mir Number Hfr Number f Automatic List C Search by Figure 5 38 Test browser X SELECT FILE CANCEL C Manufacturer amp 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 If manufacturer and machine type carry out the search 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 59 hepp 6 EQUIP
23. 3 It exists a limited number of transformers with any peculiar characteristic high power gt l100MVA and also with a high transformation ratio or a winding with few turns in wich the magnetization could not be completed due to the limit of current of the unit 20A in this situations you are suggested to try in the manual mode also selecting monofasic in order to measure the phases separately and if possible use the neutral terminal The equipment complies with EU Directives applicable to electric and C electronic equipment destined to industrial environments with category of II installation _ 96 hese 9 SPECIFICATIONS Protections There is a protection circuit that discharges the energy stored in the equipment being tested once the test has finished or if there is a drop in mains voltage Other characteristics Power on indicator Relay control matrix for measurement with three phase equipment Parameters used Compound winding resistances Simple winding resistances _9Q7 Hp xenon APPENDIX A CONFORMITY DECLARATION APPENDIX A CE CONFORMITY DECLARATION CE CONFORMITY DECLARATION UNITRONICS S A U Plaza Espa a 18 9 fl off 9 28008 Madrid SPAIN F 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 Transformer Winding Resistance Tester Equipment UM3 Manufacturer
24. 6 EQUIPMENT MAINTENANCE 5 4 Test analysis The test analysis is composed of a series of screens that show the technical data on the transformer and a table with the results obtained for each winding with a graphic display if it has a regulator adjuster Analisys Select File Machine Data Measurement T able r a A gt 5 gt N Figure 5 35 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 36 NOTICE ADVISE oe x The test hasn t finished yet are you sure to go to analysis i Figure 5 36 Confirmation that an analysis is to be performed without having finalized the test in progress 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 37 will appear NOTICE ADVISE ea x DO YOU WANT TO SAVE INPUT DATA m Oo Figure 5 37 Confirmation to save changes made in the analysis _ 58 Hh uptgpice 6 EQUIPMENT MAINTENANCE 5 4 1 Test file selection Clicking this button and as long as there are test in the SAGEN_WIN Tests directory the test search
25. ENDS Expert software of trends for transformers Figure D 10 7 ETP TRENDS SYSTEM gt Turns Ratio Excitation Current Insulation Resist 1 20 F M Winding Resist HY v sc aai TTR Error Polarization Index Time Constant 1 Technical Data ae 07 04 97 28 10 97 15 04 98 07 10 98 21 04 99 08 11 99 05 05 00 16 10 00 25 04 01 M Phase M Phase W Test Dates DD MM YY M Smoothing 4 xj Tap Number Unitronics U i Figure D 10 Screen of the application Trends 106 hse APPENDIX E GLOSSARY APPENDIX E GLOSSARY Listed below are terms that are regularly used in relation to the equipment with a description in the context of this field of work Adjuster Device for change the transformation ratio of the transformer It is possible modifying his number of turns Different from a regulator in that it normally comes fixed in one position during manufacturing Alternator Set of combined equipment to transform kinetic energy into alternating current Assembly Functional unit constitute part of an item It made up with components motor turbine Autotransformer Device for change the magnitude between input and output similarly to a transformer However unlike the transformer 1t consists of a single winding with an intermediate tap providing a common part between the windings Availability Ability of an item to carry out its function at a particular time or over a certai
26. ESHOOTING SYMPTOM PROBLEM SOLUTION The power cable is not properly connected Connect it properly The feeding must fulfill the specifications Replace the fuse see The power switch 4 is on but the section 6 4 If the ower LED 2 does no light u p gnt up The fuse has blown fault continues send The feeding of network is not adapted the equipment to an authorized technical service Send the equipment to an authorized technical service The equipment is broken down The key file has not been copied onto the computer On starting program Test option or Test and Analysis options is disabled _ Plug the key into the The USB Dongle is not in USB port of the PC lace i P correctly oriented Reinstall Software The serial cable is Connect it proper incorrectly connected a The connection cable is connected Th a T ele ee to both the UM3B and the PC but e seria cable 1S ontact an authorize damaged technical service the connection screen Section 5 2 3 indicates the opposite The unit 1s switch off Turn it on 84 7 TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION The serial cable Connect it proper incorrectly connected a On screen appears this message The cable setjes To contact with an COMMUNICATION ERROR authorized technical Check RS 232 connection damaged Service The unit 1s switch off Turn it on To close other applications antivirus resident
27. ETP SYSTEM UM3B Transformer Winding Resistance Tester User Manual Read this manual before using the equipment Keep this manual with the equipment Avenida de la Fuente Nueva 5 28709 San Sebastian de los Reyes Madrid SPAIN Tel 34 91 540 01 25 Fax 34 91 653 98 10 www unitronics electric com INDEX INDEX PROLOGUE SS SYSTEM OF SYMBOLS 4 GUARANTEE 5 1 INTRODUCTION 6 2 DESCRIPTION OF MEASURING METHOD 8 2 1 Philosophy of measuring method 2 2 Test characteristics 9 3 UM3B EQUIPMENT 10 3 1 Product description 10 3 2 System components 12 3 3 Physical description of the equipment 18 4 PREPARATIONS BEFORE USE 21 4 1 Precautions in installation area 22 4 2 Connection of equipment 24 4 3 Equipment disconnection 28 5 SOFTWARE DESCRIPTION 29 5 1 Introduction 29 5 2 Hardware key Configuration menu 31 5 3 Test performance 33 5 3 1 Test identification 35 5 3 2 Transformer technical data 39 5 3 3 Measurement configuration 42 5 3 4 Connection 45 5 3 5 Measurement 47 5 4 Test analysis 58 5 4 1 Test file selection 59 5 4 2 Transformer technical data 61 5 4 3 Measurement tables 63 5 5 Test repetition assistant 66 5 6 Remarks page 67 hese 5 7 Printing reports 5 8 About 5 9 Exiting 5 10 Other error messages 6 EQUIPMENT MAINTENANCE 6 1 Cleaning of equipment 6 2 Care for cables 6 3 Check of high current cable
28. Figure 5 53 Third page of report ee Hy xenopics 6 EQUIPMENT MAINTENANCE 5 8 About When this button is pushed a window appears Figure 5 54 showing the following Licensing data Program version data WINDING oF RESISTANCE http www unitronics electric com Lew unitronics electric com Program developed by unitronics electric in collaboration with Iberdrola License Number r een n 6 3 Rete Sa March 13th 2008 Figure 5 54 Screen with data on the program license and release If you have Internet connection when pulsing on the web address of UNITRONICS the application will load the predetermined explorer with our web page This screen also appears when the program is executed To see 6 EQUIPMENT MAINTENANCE 5 9 Exiting This button a is used to quit The program will always check whether any data have been modified during the test or analysis In the event that the test has not been completed the program always asks if the user wishes to continue with his her decision Figure 5 55 and in the event of an affirmative response offers the possibility of saving the data that has been entered Figure 5 56 If these data are saved a file 1s created with them in the directory C SAGEN_WIN Tests refer to section 5 3 1 Otherwise the file will not be created and if it existed previously an incomplete test was chosen it will be deleted NOTICE ADVISE The test hasn
29. GE x A COMMUNICATION ERROR COMMUNICATION ERROR WITH DEVICE UM3 Check RS 232 connection AANnA A RRHOAA AO ORARAAH ERASE ROR RABA ROH RAEEE Figura 5 59 Communication Error Unit in security position A communication error or another external event has taken to the unit to the position of security Figure 5 60 ERROR MESSAGE ERROR MESSAGE E3 TIME ERROR SYSTEM IS SLOW RESET THE THE SYSTEM IS IN SECURITY POSITION RESET THE SYSTEM PLEASE SYSTEM PLEASE Figura 5 60 Position of Security Error Exceded maximum time of measure The unit has a temporary limitation of operation after the one will precise refrigeration If this time is exceeded the message appears and the test is canceled do leave the unit switched on with the operative fan without measuring for a prudential time Figure 5 61 ERROR MESSAGE EXCEEDED TIME OF MEASUREMENT TEST WILL BE CANCELLED Figure 5 61 Error of exceeded time of measurement f gt Hh uptgpice 6 EQUIPMENT MAINTENANCE 6 EQUIPMENT MAINTENANCE Given the special characteristics of the equipment IT SHOULD BE 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 personnel in charge of repair adjustment and calibration should be duly qualified and sui
30. ISTANCE T 0066 Single s 0 064 _ Compound 0 062 REF TEMP 0 061 2 3 4 5 6 amp 6 8 amp 8 9 1 11 Te Figure 5 46 Graph of winding resistance at different regulator adjuster positions This graph is moveable it may be moved around the entire screen To eliminate it press the KA button 64 ne 6 EQUIPMENT MAINTENANCE If it were not possible to regulate the winding only the simple and compound resistance values will be shown Figure 5 47 As may be seen the previous button for graphic display is not present ETPRE RESULTS TABLE FILE cASAGEN_WINSEnsayos TAPUNIRAZSO64 ADBTRPUNIRAZSOB4 1 MEAS TIME 0 00 56 R AB 149 0 mOhm WR A 161 1 omOhm Figure 5 47 Display of winding measurement results without regulator adjuster _ 65 hepp 6 EQUIPMENT MAINTENANCE 5 5 Test repetition assistant Given the number of files involved in a test and with a view to facilitating the storage task for the operator the program incorporates a utility allowing tests to be copied in a different location to that originally used by the program Thus there is a possibility that both the origin and the destination are fixed flexible or network units On pressing the Q button Figure 5 48 appears ae TSEC eee ares ASSISTANT eae From CASAGEM WIM Ensayos E To CASAGEN WIN Ensayos maaana Figure 5 48 Test copy assistant Source
31. MENT MAINTENANCE Once the machine to be analysed has been selected click the J button and the file selector Figure 5 39 will appear where the operator can select the test to be analysed Figure 5 39 Selection of file containing 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 UM3B file If this is the case it is loaded into memory otherwise it informs that the file is incorrect Figure 5 40 and offers the possibility of selecting another Figure 5 39 Figure 5 40 Notification that the file selected does not correspond to the UM3B 60 Hb optgpice 6 EQUIPMENT MAINTENANCE 5 4 2 Transformer technical data 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 39 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 3 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 whi
32. TING MAGNETIZATION Eee EIEEE TEEfERTUf IERE CFEUfENEEJELEE l l l l 0 5 10 15 20 25 30 35 40 45 50 55 60 seconds Full Scale A 1 k hm 100 Ohm 10 Ohm 1 Ohm 100 m hm 10 ml hrri lest 0 Seconds 45 Measure Time H Figure 5 22 Winding magnetization If some time has elapsed since the last attempt of magnetization and the transformer has still not become magnetized an error message will appear indicating possible errors Figure 5 23 MAGNETIZATION ERROR xX MEASUREMENT ERROR IT S POSSIBLE 1 Winding terminal connection is bad 2 Current Clip has been bad connected or is broken 3 Winding is open circuit 4 UM3B current source is working bad 9 Figure 5 23 Warning that it is impossible to magnetize a winding Resistance measurement begins once the transformer has been magnetized We have small differences according to the chosen measure mode _50 Hh optgpice 6 EQUIPMENT MAINTENANCE WARNING In resistance measurement the process since magnetization begins until a valid measurement is achieved will not last more than 15 minutes being necessary a minimal rest time of 1 minute for this process is carried out again WARNING If the equipment is used outside manufacturer s specifications the security could be altered In automatic mode Initially the upper scale will be used but if the program considers that this scale
33. UST BE MADE TO ENSURE THAT THE SYSTEM IS WITHOUT VOLTAGE Before starting the test the UM3B must already be connected to the PC by means of a flat cable but THE UNIT MUST NOT BE TURNED ON UNTIL REQUESTED BY THE SOFTWARE Consequently no operation should be performed on the unit before the program checks that everything is correct prior to testing To work with the UM3B software it should nt be other programs in execution the screensaver should be deactivated and the low power mode disabled To perform a test click the Test button on the main menu This may take a few seconds during which time the message in Figure 5 4 will be displayed UPDATING REGISTER Figure 5 4 Test initialization message 33 Hh optgpice 6 EQUIPMENT MAINTENANCE This button is used to start a new test regardless of the status of program execution If a test is already in progress the user is requested to confirm whether the new test is really required Figure 5 5 NOTICE ADVISE The test hasn t finished yet are you sure to start again Figure 5 5 Notification that a new test is to start without the previous having finished If an analysis is being performed on a previous test and it is interrupted nothing will happen unless any value that might affect the analysis is modified in which case a screen such as the one shown in Figure 5 6 will de displayed NOTICE ADVISE DO YOU WANT TO SAVE
34. V 50 Hz Date DD MM YYYY WMM DD YYYY Temperature Ss Centigrade C o Franch C Fahrenheit F ve pee 4 T Realian Figure 5 3 Configuration Screen Control RS 232 in the case of that the communication of the PC with the unit 1s performed by means of the serial port You will need to indicate which port will be used COM1 COM4 by means of the existent ring E Hb optgpice 6 EQUIPMENT MAINTENANCE Supply First of all you will need to select the mains voltage that will be 115 or 230 V The frequency of mains voltage will also need to be selected which will be 50 or 60 Hz by means of the corresponding ring Language Select one of the languages that are listed Once selected after finishing the program configuration all the text of the application will change to the selected language Date The format of the date will be elected be it day month year DD MM AAAA or month day year MM DD AAAA Temperature Select the units used in the temperature Fahrenheit F or centigrade C Topology Select the nomenclature of the connection be it A B C or U V W Once the system is configured press OK button to accept chosen configuration or CANCEL if you choose to refuse it 230 Hh uptgpice 6 EQUIPMENT MAINTENANCE 5 3 Test performance The measurements performed using the UM3B system are OFF LINE Consequently before beginning the test A CHECK M
35. a message Figure 5 33 will recommend that the operator repeat the measurement NOTICE ADVISE MEASUREMENT OVER THE MEASUREMENTS DIFFER TOO MUCH SUPERVISE CONNECTIONS AND REPEAT THE MEASUREMENT IN MANUAL MODE PLEASE Figura 5 33 Message that the measurements differ too much 55 Hh uptgpice 6 EQUIPMENT MAINTENANCE If the measurement is performed on a winding with a regulator adjuster the it button will be enabled and will graphically represent the resistances measured with respect to the regulator positions Figure 5 34 It is possible to select and display the desired phase which will be plotted in the colour of each phase in the selection box and selection of simple or compound resistances is also possible see Figure 5 20 TAP CHANGER RESISTANCES REPRESENTATION I Phase W Wi Phase RESISTANCE Single a Compound Figure 5 34 Diagram with the winding resistance in the different regulator adjuster positions This graph is moveable in other words it may be moved around the entire screen To eliminate it press the gt button e Measurement in single phase way Measuring in single phase way takes advantage in the case of a transformer with regulator of the magnetization of a phase in the first position to measure the rest of positions of this form is reduced the time of measurement more than half of three phase form The time saving will be greater whatever mo
36. aintenance Preventative maintenance based on knowledge of the status of an item due to periodic or continuous measurement of a significant parameter The maintenance intervention is conditioned by the early detection of the symptoms of the fault Preventive maintenance Maintenance consisting of carrying out certain repairs or changes in components or parts in accordance with specific time intervals or certain predetermined criteria to reduce the probability of the failure or loss of performance of an item It is always scheduled Rack Frame into which electronic equipment is located Regulator Device capable of modifying the number of turns in a transformer and consequently of changing its transformation ratio Report Documentation resulting from the performance of a test Resistance Opposition from the conductor to the flow of current 111 hse APPENDIX E GLOSSARY Rotor Rotating part of a machine Rotating machine Combined assembly of items of equipment designed to receive a certain form of energy and convert it into another more suitable form or produce a certain effect One of the forms is kinetic energy Thus there are AC and DC generators and motors and rotating converters RPM Acronym of Revolutions Per Minute Indicates the operating regime of the machine Scheduled maintenance Preventive maintenance performed on the basis of preset time intervals number of operations stroke etc Short circu
37. ance Department Avenida de la Fuente Nueva 5 28703 San Sebastian de los Reyes Madrid SPAIN Tel 34 91 540 01 25 Fax 34 91 653 98 10 URL http www unitronics electric com _ 94 zeges 9 SPECIFICATIONS 9 SPECIFICATIONS Power requirements Depending on version 230Vac 10 50 60 Hz 5 115Vac 10 50 60 Hz 5 Consumption 450 VA max Technical characteristics 40 with Width 13 5 mo Weight 0 OOT 7 Table 9 1 Technical characteristics SAT a 250 Vac 20x5 Rear Panel FUS 1 25AT PAUN 250 Vac 20x5 Fuses 630 mA T 250 Vac TR5 Main Board F2 630 mA T 250 Vac TR5 Fl 630 mA F 250 Vac TRS Microcontroller F2 630 mA F 250 Vac TR5 Table 9 2 Fuses required All fuses must be homologated for 250 Vac 905 Hb uptrpice 9 SPECIFICATIONS Technical specifications Output voltage current cables in open circuit upatcanen f Orson emee sane Operation humidity 10s o Sonem o fi Storage humidity do 590 Table 9 3 Unit specifications 1 In these ranges if the equipment meets subjected to driven RF interferences in the band of 8 to 15 MHz it may produce strong oscillations in the measurement 2 In resistance measurement the process since magnetization begins until a valid measurement is achieved will not last more than 15 minutes being necessary a minimal rest time of 1 minute for this process is carried out again
38. anised 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 implemented 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 sez 2 DESCRIPTION OF MEASURING METHOD 2 2 Test characteristics The objective of the test is as follows e It should be simple to perform and to the extent possible should allow for performance by duly trained facility personnel without the need for specialists to be present e It should not imply any risk for the equipment to be tested e It should not imply excessive unavailability none if possible e The data and results obtained should provide at least some information that 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 a 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 on 3 UM3B EQUIPMENT 3 UM3B EQUIPMENT 3 1 Product description The UM3B Low Resistance Ohmmete
39. arnings indicating your work 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 e The equipment is intended for functioning with a thermal limit with relation to the disipation of the supply energy during the tests so do keep in mind the next warnings 22 4 PREPARATIONS BEFORE USE ROOM TEMPERATURE The equipment only will be used within limits specified of operation 5 C 35 REFRIGERATION For the resistance measurement the process since the magnetization begins until a resistance valid value is obtained it cannot last more than 15 minutes in the scales of current of 20 amperes being necessary a time of rest of 1 minute so that this process is made again for example hoping between positions of regulator to measure the 3 phases again Once finished all the tests unit must recover the suitable temperature with his system of refrigeration during 3 minutes before switching off WARNING In the resistance measurement the process from the start of magnetization until obtain a correct value this time can t be bigger than 15 minutes being necessary a minimum time of rest of minute for new process to start For example waiting between steps of regulator for a new measurement of the three phases Don t obstruct the entrance
40. ase W In the case of single phase transformers the correspond will be Red phase X1 and Yellow phase X2 The black terminal correspond with the neutral and is not used for the unit in the measurement only there is for compatibility with others units Furthermore at the accessible terminal of the transformer the voltage terminals must ALWAYS be below the current terminals see Figure 3 1 Figure 4 2 and Figure 4 3 in order to avoid any influence by the contact resistances on the measurement Fastening will be both secure and safe in order to minimize contact resistance between the clamps and the connection terminals on the equipment being tested Likewise the areas where the current and voltage clamps are connected contact areas should be free from dust oxides etc such areas having been sanded if necessary An special attention in the hoses connection in that contact doesn t exist between the current and voltage clamps to avoid possible erroneous measures WARNING If the equipment is used outside manufacturer s specifications the security could be altered WARNING When the program indicates it connect first all the current clips and next all the voltage clips in correspond of your colours to the phases indicated DURING THE MEASUREMENT Never remove the cables during the measurement nor change the position of transformer s regulator because this could open the circuit The supply connection of the equipmet should be r
41. ction Along with other units with their respective applications se Appendix C the UM3B forms a system for the testing and analysis of electrical machinery Therefore all these applications are triggered from a common application named Electrical Machinery Testing and Analysis System Figure 5 1 which is found in the folder of the same name in Start lt Programs mo TEST AND ANALYSIS SYSTEM OF ELECTRIC MACHINES _Main Menu St enE EERE EERE ERE EE OE ERO E Ee Notative M i Measure I Wires Huge Wires General Config About Exit SS v tas wea TRANSFORMER TURNS _DIAGNOSTIC RECOVERY INSULATION VOLTAGE RESISTANCE ETP DIAGHELP l ETP TRENDS Figure 5 1 TEST AND ANALYSIS SYSTEM OF ELECTRIC MACHINES menu screen This screen shows all the tests which may be performed on the different machines and or components If any of the options is shown as being disabled it is because the client does not posses the corresponding application which may be acquired at any time see chapter 8 and appendix C _29 eges 6 EQUIPMENT MAINTENANCE In this case the tab POWER TRAFO or MEASUREMENT TRAFO or the corresponding icon in the upper section should be selected Then the user presses the icon that corresponds to the UM3B triggering the said program Figure 5 2 This basically offers two optional ways of functioning Test performance Test Results anal
42. e equipment especially if in storage may cause rapid temperature variations leading to the appearance of humidity due to condensation 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 clean 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 No exposure to high degrees of humidity No exposure to active gases No exposure to extreme temperatures The recommended storage conditions are as follows Temperature 10 to 75 C 50 F to 167 F gt Humidity oe 5 to 90 In areas of high humidity it might be advisable to use bags of desiccant material _ 82 Hb uptpice 6 EQUIPMENT MAINTENANCE 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 223 hse 7 TROUBLESHOOTING 7 TROUBL
43. e ert so eee oh Cae yet tha hh k P P E E Clk ag nh ae PEF dar she Pepe LP 5 i iS Hie oi Lo Eo iat Petite Or Paa v Figure 3 6 Photograph of cable transportation bag SOFUM3BXXWXXX USB Pen Drive containing the equipment control software UM3BMUXX The current user manual UM3P120M 12 meter extension cable for the connection cable hose _15 on 3 UM3B EQUIPMENT Figure 3 7 Photograph of cable hose extension Mains strip with four power sockets protected against transient voltages differential currents and overcurrent conditions It RAFVDM00 S ovens incorporates a voltmeter for the direct verification of the power voltage and terminals for ground connections _16 3 UM3B EQUIPMENT Figure 3 8 Photograph of connection strip Rigid transport case with reinforced external protection and interior cushioned with high density foam rubber MMOo1 Figure 3 9 Photograph of transportation case ie Hb optpice 3 UM3B EQUIPMENT 3 3 Physical description of the equipment Figure 3 10 includes a drawing of the UM3B 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 Transformer Winding Resistance Tester Ba 2 Measurement port Power Comm LT ein ca L UM3B UNITRONICS MODE O SERAL NP Min
44. eans of light signals if the LED on the left hand side of the text flashes the necessary requirements have not been met Likewise the equipment should be connected to a grounded supply since 1f this is not the case the equipment might become damaged or the measurements made might be incorrect In order to protect the unit from possible residual energy in the transformer all the current clips will be connected first to their corresponding phases according to the list of colors After will be connected all the voltage clips 45 hese 6 EQUIPMENT MAINTENANCE If you presses the button an explanatory screen will appear in which is shown how the connections should be carried out correctly 1t Figures 5 18 ETPRB CONNECTIONS DETAILS Cani coe phase to connect Current Clip Connect voltage clip and its associate current clip for each phase Voltage Clip must be between Current Clip and winding terminal Be sure clips both don t touch between them Figura 5 18 Connection details that all the conditions indicated in WARNING It is very important for the correct operation of the equipment this window are met Once all the conditions are met the OK and NEXT buttons will be enabled This screen will appear each time a winding is measured and through it the software will indicate how to connect the measuring cables identified using different colors to each one of the transfor
45. ee BACK MEASURE Figure 5 25 Resistance measure screen in manual mode with out of range message Whenever a change is made to the scale a new process of magnetization begins since the current injected is not the same for all the scales An error may appear at this point if the machine being tested has a greater resistance than that which can be measured by the equipment 1 KQ the error displayed being as in Figure 5 26 MEASUREMENT ERROR x RESISTANCE GREATER THAN 1 Kohm D D Figure 5 26 Warning that the resistance to be measured is greater than 1 kQ If none of this occurs the resistance is measured The program checks that the resistance readings are very similar they are within a certain accuracy range 52 Hh optgpice 6 EQUIPMENT MAINTENANCE 0 30 Resistance Ohms Figure 5 27 Diagram showing a measurement taken to be correct constant measuring If the result see Figure 5 27 is judged to be valid in automatic mode the value obtained will be displayed in the corresponding box but if the measurement shows oscillations a warning message will be displayed Figure 5 28 Furthermore the average value of the last resistance readings will appear in red in the corresponding box This does not mean that the measurement is wrong but that it was not stable NOTICE ADVISE RESISTANCE VARIABLE Figure 5 28 Warning that the resistance measured is inconsistent T
46. eliable because an interruption during the test could damage the equipment 26 4 PREPARATIONS BEFORE USE Figure 4 3 Photograph of cable hose to winding connection WARNING DURING THE TEST THE CLAMPS MUST NOT BE TOUCHED OR DISCONNECTED SINCE THE VERY HIGH CURRENT CIRCULATING MIGHT CAUSE A STRONG PEAK AND DAMAGE TO THE OPERATOR AND EQUIPMENT 2T hse 4 PREPARATIONS BEFORE USE 4 3 Equipment disconnection WARNING The cables must be handled with maximum care as they carry large currents and high inductances which may produce high voltage transients Thus the normal safety measures for high voltage installations should be taken into account After testing each winding the equipment will then demagnetise it Therefore the UM3B unit will turn it off when the control software specifies that the measuring has finished In transformers of more than 20MVA discharging may take several minutes Thus it is good safety practice to use rubber gloves for handling the connection clamps Once requested by the program the UM3B unit will be disconnected according to the following steps Turn off the UM3B Remove all the voltage clamps before the current clamps from the equipment being tested Remove the UM3B hose ALWAYS REMOVE ALL VOLTAJE CLAMPS BEFORE THE CURRENT CLAMPS WHEN REMOVE THE CABLES _ 28 heppi 6 EQUIPMENT MAINTENANCE 5 SOFTWARE DESCRIPTION 5 1 Introdu
47. ers these will be automatically replaced when creating PC files but not what the operator sees for the following characters Alt Gr 6 B Alt 225 u Alt 230 b Alt 231 3 6 EQUIPMENT MAINTENANCE Alt 221 q Alt 244 i Alt 21 NNN Manufacturing number up to 242 characters Transformer identifier For example tests performed on the voltage transformer 123456 of the factory Uniravis will be saved in the subdirectory in the following way C SAGEN_WIN Tests TRVUNIRA123456 and the tests on the power transformer 654321 of the ARK factory will be saved in the subdirectory C SAGEN_WIN Tests TRPARK___654321 There will be as many subdirectories in C SAGEN_WIN Tests as there are machines that have been tested In each subdirectory a series of files will be generated with a similar nomenclature structure to the subdirectories These files will have a 3 digit numerical extension 0 to 999 each of which will contain a test on the same machine The files to be generated are as follows RDBTTTFFFFFNNNN nnn In this file are recorded all the data of complete test in Excel format in text mode with tabulators medRDBTTTFFFFFNNNN nnn This file is used exclusively by the program and contains all the test data It is not editable by the operator TTTFFFFFNNNN cab This file contains all the technical data on the transformer The operato
48. ested to be connected later according to the sequence indicated by the software V maxim 24 V I maxim 20 A Installation CATH Connecting UM3B equipment to the mains This connection is accomplished by plugging the power cable input 5 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 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 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 UM3B unit will be turned on 4 THE UNIT SHOULD NOT BE TURNED ON UNTIL THE CONTROL SOFTWARE INDICATES THIS 25 hse 4 PREPARATIONS BEFORE USE As the program so requests the hoses leading to the equipment being tested will be handled in the required way Special care must be taken when connecting each of the hoses according to their different colours to the phases indicated by the program The colours assignment to use for distinguish the phases in three phase transformers correspond with Red phase U Yellow phase V and Blue ph
49. given in this chapter the repairs may be excluded from the guarantee 21 hse 4 PREPARATIONS BEFORE USE 4 1 Precautions in 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 that the environment is appropriate without rain or dust storms and within the temperature humidity ranges specified for operation see chapter 9 Specifications 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 A 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 Set adequate w
50. he measurement process may be cancelled at any moment by pressing the button If this happens the program demagnetises the winding and then displays a message confirming the cancellation of the measurement Figure 5 29 NOTICE ADVISE CANCELED MEASUREMENT Figure 5 29 Notification that measuring has been cancelled a4 Hh optgpice 6 EQUIPMENT MAINTENANCE Once the measurements have been performed on this regulator adjuster position and if everything has gone well the program requests a change to another regulator adjuster position Figure 5 21 or Figure 5 120 is displayed if a measurement is to be performed on another winding Finished the measurement and depending on its duration and the evaluated transformer the application will proceed to present in screen a message Figure 5 30 of elimination of residual charge energy stored in the L not allowing the advance until the same one has lowered to asafe value ETPRB RESISTANCE MEASUREMENT ba itest CONNECTION GROUP WINDING Max 20 0 Amp oo 100 754 502 WINDING COMPOUND RESISTANCE MEASUREMENT Ruw Ryw m i Full Scale R 1 KOhm 100 Ohm Re DISCHARGING RESIDUAL CHARGE IN 1 Ohm 100 mOhm TRANSFORMER 10 mOhm EE Ssi C C t C C C Measure Tio 0 00 500 1000 1500 2000 2500 3000 35 00 40 00 4500 50 00 Sec LEEM Figure 5 30 Discharging residual charge in
51. heless it is always good to gain insight into the degree of satisfaction of the customer 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 _Q 8 TECHNICAL SUPPORT COMPANY Client No Address City Zip code Province Contact person e mail Telephone Fax UMS3B series No Date of purchase Degree of satisfaction J Very satisfied J Satisfied _ Dissatisfied __ Fairly satisfied U Not very satisfied __ Very dissatisfied What safety elements would you incorporate What new calculations should it support _Q2 8 TECHNICAL SUPPORT What standard optional elements would you add What elements would you remove What defects does the system have Table 8 2 Survey _ 93 hese 8 TECHNICAL SUPPORT 8 4 Authorized technical representatives and services UNITRONICS S A U Sales department UNITRONICS S A U Sales Department Avenida de la Fuente Nueva 5 28703 San Sebastian de los Reyes Madrid SPAIN Tel 34 91 540 01 25 Fax 34 91 540 10 68 URL http www unitronics electric com Technical Service UNITRONICS S A U Mainten
52. is too large for the measurement it will automatically change to the lower scale In manual mode The informative screen of the Figure 5 24 will appear and accepting it you can pass to a similar screen like Figure 5 25 In this screen the user can select the bottom scale resistance according to his approach This way is advisable for advanced users and if they known the working scale and the approximate values of the protocol ahead of time this way accelerates the measurement process because the software doesn t have to calculate the most appropriate scale You can make the scale change in any moment of the measurement resistance If the scale that is selected is too low will appear the message outside of range Figure 5 25 and a superior scale will be chosen When the user considers that the measure is correct he can press the button ACCEPT then the program takes the necessary samples and the measure process passes to the following stage MANUAL MODE CHOOSE THE SCALE AND SELECT MEASURE WAIT THE MAGNETIZATION AND WHEN RESISTANCE BECOME STABLE THEN SELECT OK REPIT THE SAME FOR EACH PHASE Figure 5 24 Information screen in the manual mode 51 hhe 6 EQUIPMENT MAINTENANCE ETPRB RESISTANCE MEASUREMENT itest CONNECTION GROUP WINDING TAP 1 Fe oao s v O a Ryw DEL jo Full Scale R 1 KOhm ai 100 Ohm 10 Ohm 1 Ohm 100 mOhm 10 mOhm Measure Time 4 i NE 103 e sl R
53. it Joining together of two points subjected to different voltages via a very low resistance bridge The current reaches its maximum value Short circuit voltage The voltage that must be applied in the high voltage winding in order for the nominal current to circulate through the low voltage winding when the latter is short circuited Simple resistance In a three phase transformer it is the winded real resistance in each one of the phases of the transformer For star connection it is the one that exists between each phase and their neutral has external terminal or not and for triangle the independent winding of each phase Spare Part component assembly item of equipment or machine belonging to an item of a higher order which is susceptible to being replaced due to breakage wear or consumption Spiral Turn of a conducting wire around a core Star shaped connection Y connection Windings connection in which the end of each phase winding of a three phase transformer or of each winding with the same voltage assigned for single phase transformers making up a three phase bank is connected to a common point neutral The other end of the terminal is connected to the terminal of the corresponding line 112 hse APPENDIX E GLOSSARY Stator Fixed part of a rotating electrical machine within which the rotor turns Test Check performed on an item to evaluate one of its characteristics Terminal Conductive element for c
54. itronics od TECHNICAL SITE Laboratory od Antonio od INSTRUMENT UM 3 00150 MMDDYY 04 25 00 X PA gt CANCEL ok NEXT Figure 5 8 Screen with test identification data MFR NUMBER Serial number of transformer tested 35 Hb optgpice 6 EQUIPMENT MAINTENANCE 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 9 Whenever the option other exists a similar window will be displayed Figure 5 9 Box for entering name of manufacturer of machine being tested MACHINE TYPE The machine type is selected from a list which cannot be modified by the operator FUNCTION Transformer function within the installation SITE NAME The name of the installation e g Pisuerga thermal power plant 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 within 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 USER 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 UM 3 Serial number of the UM3B u
55. low voltage or tertiary winding TERTIARY GROUP Specifies whether in addition to the high and low voltage windings the transformer has a third winding ETPRB TECHNICAL DATA 1 p z FILE CASAGEN_WINSEnsayosi TAPUNIRAZ80E4ADETAPUNIRAZEDE4 4 TECHNICAL SITE Laboratory SITE Unitronics GONE By Antonio DATE 04 25 00 UM SERIAL N omo MACHINE Power Transformer MANUFACTURER UNIRAMIS FUNCTION Test SERIAL M 28064 TYPE 50 24 20 No Tertiary High Voltage Low Voltage Tertiary Tertia Transformer Single phase COMPOUND VOLTAGE Ev 20 000 INTENSITY 1 440 Autotranstormer Three phase l STR i LER epi AAN oO NAA AS BAT ADJUSTER v HIGH YOL REFRIGERATION ACEITE hd HANDLING Ne Z REGULACION MANUFACTURE YEAR 1999 TYPE Charge POWER MA 0 050 Switcher m MANUFACTURER Below cover NOMINAL Vee 2 3950 CONNECTIONGROUP SDyni1 TAPSNUMBER 6 JUMP ved o NOMINAL POSTION S18 CENTBALTAPS NUMBER S 1 Figure 5 11 Screen with the technical data on transformer being tested 40 Hb optpice 6 EQUIPMENT MAINTENANCE On the right it is possible to select the other parameters for each winding such as COMPOUND VOLTAGE kV Nominal voltage between two winding phases In the case of a delta connection it coincides with the simple or phase voltage For greater clarity see Figure 5 12 Wo N Figure 5 12 Explanation and diagram of
56. med 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 ee mourn 1 INTRODUCTION Gaining insight into the status of transformers is a complex problem Different techniques have been developed for this purpose allowing in depth studies to be made of the different parts into which a transformer may be divided One of the methods used consists of measuring the resistance of the transformer windings through which problems may be detected such as e loosening of connections e defects in the regulators e short circuiting between turns e hot points in winding Nearly all these methods show a peculiarity the absolute values of the measured parameters tend not to be sufficiently indicative for the results to be evaluated their evolution providing better information on winding status Therefore it is interesting to store the results and incorporate them into databases allowing them to be correlated This leads to the definition of a predictive maintenance policy consisting of scheduling with a suitable frequency the performance of a series of routine and
57. mer windings The order to be followed is firstly measurement of the tertiary followed by the low voltage winding and finally the high voltage winding That is of course if all of these have been selected _ 46 Hh optpice 6 EQUIPMENT MAINTENANCE 5 3 5 Measurement In this section the resistance is measured We will see a screen as in Figure 5 19 Resistance measurement F ETPRE RESISTANCE MEASUREMENT x test CONNECTION GROUP WINDING Max Amp Ddo OO W oa 100 WINDING COMPOUND RESISTANCE MEASUREMENT Ruw Pow ffs a CLAE mOhm EI mOhm AUE ET Full Scale R i a WINDING SINGLE R REFERED TO THE TEMP OF 75 00 C a 10 Ohm oleae WRu WRv WR o OOOI mon AOOO mon CCH mom Heasure Time Figure 5 19 Resistance measurement screen The upper side of the measurement screen displays information on the transformer connection group and the winding being measured It also indicates the position measured if the winding has a regulator adjuster Also it appears a pull down menu PHASE in which the phase is selected that 1s going away to measure all the phases of once measured three phase or selecting 2 phases and measuring of single phase way can be measured On the left there are two indicators the indicator located in the lower part shows the background of the resistance scale and has 6 possibilities The resistance measurement will be automatic or manual as it has been
58. n time period under defined conditions and at a defined level of performance Breakage Fault causing the unavailability of an item Bridge Resistance of low value used to create short circuits Capacity Physical property allowing electrical charge to be stored between two insulated conductors separated by a dielectric subjected to a potential difference Cleaning Elimination or reduction of dirt slag waste material rust or incrustation such that an item may operate under optimum operating conditions 107 hese APPENDIX E GLOSSARY Coil Assembly with a conducting cross section responsible for performing inductive magnetic coupling Component Unit belonging to an assembly which is generally not functional in itself and is formed by parts turbine rotor bearing motor cylinder Compound resistance In a three phase transformer it is existent real and measured resistance value between external terminals of the transformer excluded the neutral one Conductor Material allowing for the continuous flow of an electrical current when subjected to a difference in potential Corrective maintenance Maintenance performed on an item when a fault has already occurred restoring it to 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 as a result of a reaction with a medium Current Movement of electr
59. ng Figure 5 21 TAP CHANGER ie ar xj HGH WA CONNECT THE TAP CHANGER IN THE TAP Figure 5 21 Notification for regulator adjuster to be put into position shown Once the action is carried out the ACCEPT button should be pressed and the injection of current into the transformer will be triggered At this point the screen changes showing a message indicating that the transformer is being magnetized At the same time a diagram appears showing the evolution of the absorption of this current by the transformer Figure 5 22 This measurement is also indicated in terms of percentage of test current using the graphics bar on the upper left hand side WARNING Taken care of during the measurement To retire cables during the measurement nor never to move the regulator of the transformer since it could get to open the circuit and like consequence to damage the equipment The feeding of network of the equipment must be trustworthy since its interruption during the test could get to damage the equipment When measuring in transforming with high inductancias and low resistance great power the current elevated one can cause a transitory tip of tension and produce damages to the operator and the measuring equipment _ 49 Hb optpice 6 EQUIPMENT MAINTENANCE i ETPRB RESISTANCE MEASUREMENT test CONNECTION GROUP WINDING PHASE Dao ae om OTe WAI
60. ng box If any of the data influencing the calculation of the resistances are modified the program will provide a notification if the user moves on to another screen reminding of the fact that data have been modified and that this may have repercussions on some measurements Figure 5 43 NOTICE ADVISE Important Data has been modified It can produce the lost of the measurement configuration and its results Do you want to continue Figure 5 43 Confirmation of continuation of analysis after having modified key data Normally the user will not want to continue consequently when NO is pressed a screen will appear informing the user that if the change is not to take effect the CANCEL button must be pressed Figure 5 44 Figure 5 44 Recommendation for changes not to take effect 62 heppi 6 EQUIPMENT MAINTENANCE 5 4 3 Measurement tables In this table the result of the measurements is shown The screen may be of two different kinds depending on whether the selected winding has a regulator adjuster or not However both have an upper part that shows the file being analyzed and below the user may select the winding for which the resistances and the environmental and transformer temperatures are to be calculated for reference purposes In the first case winding with regulator adjuster a screen will appear as shown in Figure 5 45 As may be seen it has the appearance of a spreadsheet and for each
61. nt of zero potential Not to be confused with mass History file Record of the incidents faults repairs and general actuations regarding a particular item Installation Integrated system of items forming a functional production or services unit Insulation resistance Resistance from an insulating material against the flow of current measured in the direction in which insulation is to be ensured Insulator Substance with low electrical conductivity The flow of current through it may be taken to be negligible Item System sub system installation plant machine equipment structure building assembly component or part that may be considered individually and separately reviewed or tested 109 hse APPENDIX E GLOSSARY LED Acronym of Light Emitting Diode A diode which when polarized emits light of a particular wavelength Machine Complex unit of a higher order made up of assemblies components and parts grouped together to form a functional system It is synonymous to term equipment Magnetic package All the elements that make up the electromagnetic coupler which transforms electrical energy into magnetic energy for this in turn to be transformed into mechanical energy rotating machines or back into electrical energy transformers Maintenance Set of technical and administrative activities whose aim 1s to conserve or restore an Item in to the conditions allowing it to perform its function Maintenance
62. onnecting a winding to external conductors Transformation ratio Ratio between the number of spirals in a secondary winding and that of the primary In practice it represents the ratio between the voltage in the high voltage winding and that of the low voltage tertiary winding Transformer Device able to modify to its output the alternating voltage input level It also provides galvanic isolation between input and output Voltage Difference in potential between two points Measured in Volts V Winding Set of spirals forming an electrical circuit associated with one of the voltages for which the transformer has been defined Zigzag connection Z connection Windings connection made such that one end of each phase winding of a three phase transformer is connected to a common point neutral and where each phase winding consists of two parts in which out of phase voltages are induced 113
63. ons between two points of a conductor due to the difference in potential between both Defect An alteration in the conditions of an item of sufficient magnitude to cause its normal or reasonably foreseeable operation to be unsatisfactory Delta connection D connection In series connection of the phase windings of a three phase transformer or of the windings with the same assigned voltage as single phase transformers making up a three phase bank accomplished such that a closed circuit is created Diagnosis Deduction of the nature of a fault based on the symptoms detected Emergency maintenance Corrective maintenance which must be performed immediately to avoid serious consequences 108 hse APPENDIX E GLOSSARY Equipment Complex unit of a higher order consisting of assemblies components and parts grouped together in order to form a functional system It is synonymous to term machine Failure Loss of the capacity of an item to perform its specific function It is synonymous to term fault Fault Loss of the capacity of an item to perform its specific function It is synonymous to term failure Field winding Part that conducts the current in a machine Frame Set of components that physically support a system or equipment Fuse Device which protects equipment against overloads and short circuits It contains a small cross section conductor which melts in the event of the current being too Strong Ground Poi
64. ormer is in bad condition The connections have not Check the connections been correctly performed and repeat measuring Check cables see 6 3 The hose is in bad section Contact an condition authorized technical Service The transformer is in bad condition The USB Dongle is not in Connect the key in the USB port USB port The option Test does not appear saat Install the program Not has installed the file of inserting the USB key the diskette key when concluding the installation again The message Measurement Error Variable resistance appears on screen Table 7 1 Most common problems and solutions The number in brackets refers to Figure 3 1 section 3 3 To contact an authorized technical service or send them equipment refer to section 8 8h hese 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 the operator in charge of equipment and person responsible therefore _ 87 hese 8 TECHNICAL SUPPORT 8 1 Return for calibration repair If after reviewing chapter 7 Troubleshooting it 1s concluded that the equipment should be returned for calibration repair the following instructions should be adhered to l Copy and fill in the sheets shown on the following pages and attach to equipment
65. ouring J Hb optgpice 6 EQUIPMENT MAINTENANCE 6 2 Care for cables The UM3B equipment is capable of providing very high currents so THE CABLES MUST BE IN PERFECT CONDITION TO AVOID THE DANGER OF ELECTRIC SHOCK OR ERRORS OR INACCURACIES IN MEASURING 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 malfunctioning 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 Special care should be taken with the serial cable for connection with the PC this is responsible for controlling the unit _78 Hb enor 6 EQUIPMENT MAINTENANCE 6 3 Check of high current cables la Figure 6 1 Diagram of connector pins Figure 6 2 Test cable hose clamps To check the test cables they should be disconnected so of the unit like of the equipment under test THE CABLES SHOULD BE IN PERFECT STATE TO AVOID ELECTRIC SHOCKS OR 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 The only device required is a polymeter indicating electrical continuity or discontinuity To correctly check
66. ous screen All are shown against a yellow background this indicating that they are informative data and cannot be modified TYPE Type of transformer used Appears on its nameplate Transformer Auto transformer Specifies whether the transformer is really a transformer or an autotransformer Non tertiary Tertiary Indicates whether the transformer has a tertiary winding or not Single phase Three phase Specifies whether it is a single phase or a three phase transformer YEAR OF MANUFACTURE Year of manufacturing of transformer COOLING Type of transformer cooling system It may be oil based or dry _ 39 Hh eptgpice 6 EQUIPMENT MAINTENANCE POWER MVA Maximum power of transformer in millions of volt amperes RATED DC VOLTAGE Rated short circuit voltage in percentage terms This is the percentage of the rated voltage that needs to be applied to the high voltage winding for the rated current to circulate through the low voltage winding when the latter is short circuited The voltage appears on the nameplate CONNECTION GROUP This is the connection group of the windings for three phase transformers On pressing the indicator a list opens with the available possibilities When an N n appears in the groups it shows that one of the windings has an accessible neutral if it is an N e g YNy0O it is the high voltage winding that has the accessible neutral and if is an n e g Dyn5 it is the
67. people if the appropriate precautions are not taken 1809001 UNITRONICS S A U is an ISO9001 certified company C C The equipment meets the requirements of the EU Directives UM3B Transformer Winding Resistance Tester User Manual January 2013 Eighth Edition UM3B_User_Manual_V8_0CE doc Copyright 2013 UNITRONICS S A U All rights reserved No part of this manual may be reproduced without authorization The contents of this manual may change without prior notice T GUARANTEE GUARANTEE All the equipment produced by UNITRONICS is covered by a standard guarantee of 12 months as from de date of delivery to the chent The guarantee is against material and workmanship defects UNITRONICS obligation covers the repair or replacement of faulty products throughout the guarantee period The guarantee covers the equipment but it is not applicable to accessories cables etc In order to benefit from the guarantee the purchaser should notify UNITRONICS or its nearest representative of any defects prior to expiry see section 8 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 perfor
68. policy Strategy governing the decisions taken by the management of a maintenance organization Mass Reference point in an electrical circuit Metric ratio Technique of resistance measurement consisting of making the same current circulate through the resistance whose value is to be determined and a reference resistance of known value Modification Partial change to the design of an item Non destructive test Test performed on a machine applying a lower voltage than the recommended maximum Neutral Point in a symmetrical system of voltages that is normally at zero potential Part Constituent parts of a component gaskets screws 110 see APPENDIX E GLOSSARY Permissible condition Permissible status of an item for a specific use It will never be below that required by the official and technical regulations for such use It is synonymous to term permissible status Permissible status Permissible condition of an item for a specific use It will never be inferior to that required by the official and technical regulations regarding such usage It is synonym to term Permissible Condition Phase Each of the single phase currents that make up a multi phase system Normally included in this term are conductors windings etc Phase winding Set of spirals that form a multi phase winding Power Product of the voltage applied to a circuit by the current circulating through it Measured in Watts W Predictive m
69. protective software of screen and way of low consumption Check that there are no The connections have not open circuits in the The message Magnetization Error been correctly performed winding and repeat the It is possible that the circuit is open measurement in the winding appears on the Check cables see 6 3 program screen The Another software application interferes with the communication hose is in bad section Contact an condition authorized technical service The message Measurement Error The winding resistance is Resistance greater than 1 kOhm outside the unit appears on screen measurement range Check connections and repeat measurement The connections have not If the problem persists been correctly performed perform the measurement in single phase Check cables see 6 3 The hose is in bad section Contact an condition authorized technical The message Measurement Error Resistance out of range appears on screen service _ 85 7 TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION Send the equipment to an authorized technical service Repeat the measurement If message appears again try in other transformer If message persist the The message Measurement error equipment perhaps is System will restart appears on faulty Send the The equipment maybe is faulty The equipment maybe is faulty screen equipment to an authorized technical service The transf
70. r voltage current etc NO OF CENTRAL POSITIONS Number of positions for the nominal position maximum 6 Normally there is only one If there were more their nomenclature would be the number of the central position plus a letter For example 12a 12b 5 3 3 Measurement configuration This screen Figure 5 14 is used to select the transformer windings to be tested It is also used to select the measure mode the difference between ways is detailed in the section 5 3 5 the transformer temperature and the temperatures to which the measurement results are to be referenced If any of the windings has a regulator or adjuster it will be possible to select the positions to be measured The nominal position appears in blue and on selecting it the central positions to be tested may be chosen if there are several such positions There is a _42 Hh optpice 6 EQUIPMENT MAINTENANCE verification box with the name All that may be used to select all the possible positions at the same time ETPRB MEASUREMENT CONFIGURATION Ree x FILE CASAGEN_WiINSEnsayos T RPUNIRAZS064 RDBTRPUNIRAZSOB4 0 TECHNICAL SITE Laboratory SITE Unitronics DONE BY Antonia DATE 04 25 00 UMSERIALN 00150 MACHINE Power Transformer MANUFACTURER UNIRAYIS FUNCTION Test SERIAL 28064 D TEST DATA High Voltage Low Voltage Tertiary SELEEDL LSPS oie MEASLIAE HIGH OL All TRANSF TEMPERATURE REFERENCE TEMP TEF FTT
71. r is especially designed for the measurement of the resistance of transformer windings and single and or three phase autotransformer of any variety However this equipment is also suitable to pure ohmic resistance and windings resistance of rotating machine measurements It is in the measurement of three phase transformer windings however where the full power of the equipment is shown since in a single test it provides the simple and compound resistance value for each winding both high and low voltage and tertiary Furthermore to calculate the results the system takes into account the transformer connection group and the temperature at which the test is carried out as such results are provided at the reference temperature specified by the operator Transfo Measurement Port Figure 3 1 Photograph of UM3B equipment 10 Hb optpice 3 UM3B EQUIPMENT The equipment is based on the measurement of simple parameters using a data acquisition system and a computer application for calculation performance The measurement technique used is the metric ratio resistance method measured on four wires as this technique presents a series of advantages such as e immunity against the variations in the values of the measuring circuit components e immunity against temperature changes e immunity against variations in test current Once the data is obtained there is enough information to make diagnoses about the current status of the tran
72. r may not edit this Temporary files will also be generated automatically in C SAGEN_WIN Tests Whenever a process is _ terminated This file which is named medRDBTTTFFFFFNNNN tnn serves as a backup in the event of any anomaly in the system such that the program may continue as from the last process performed This file remains in effect only until the test is successfully performed at which moment the aforementioned definitive file is generated and the temporary file is deleted 35 Hh uptgpice 6 EQUIPMENT MAINTENANCE The UM3B 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 vi 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 5 3 2 Transformer technical data This screen Figure 5 11 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 previ
73. re positions has the regulator Let us see an example Let us suppose a regulator with 10 positions the sequence of the measurement will be the following one 1 To measure of position 1 to the 10 phase UV 2 To measure of position 10 to 1 to the inverse one phase UW 3 To measure of position 1 to the 10 phase VW For the sequence n 1 first we selected UV in PHASE pull down menu if we aren t located in posici n 1 of the regulator we looked for it by means of the buttons 56 Hb optgpice 6 EQUIPMENT MAINTENANCE PREVIOUS or FOLLOWING Next we press MEASURE and when the measurement has finished we will have the resistance composed of phase UV In order to continue with the measurement we pressed FOLLOWING to go next MEASURE So on until arriving at the position of the regulator and later we press last position Once completed all the positions we select UW to it in menu drop down PHASE and made the same process but to the inverse one This time we use button PREVIOUS to be backing down positions until we arrive at first position Once we arrive at first position we select VW in PHASE menu repeating the process from posici n 1 until all the positions are completes When finishing the 3 phases software automatically calculates in each position the simple resistance makes the compensation in temperature and shows the results in screen 57 Hb optgpice
74. s 6 4 Fuse replacement 6 5 Storage and transport 7 TROUBLESHOOTING 8 TECHNICAL SUPPORT 8 1 Return for calibration repair 8 2 Requests for spares 8 3 Observations 8 4 Authorized technical representatives and services 9 SPECIFICATIONS APPENDIX A CE CONFORMITY DECLARATION APPENDIX B SYSTEM REQUIREMENTS APPENDIX D CONTROL SOFTWARE INSTALLATION APPENDIX D OTHER UNITRONICS EQUIPMENT D 1 Applications available APPENDIX E GLOSSARY INDEX 68 72 73 74 76 77 78 79 81 82 84 87 88 91 91 94 95 98 99 100 101 102 107 see PROLOGUE PROLOGUE The user manual contains all the information required to start up and maintenance of the UM3B measurement system Its objective is to provide everything needed for successful operation IMPORTANT Read the instruction manual fully before starting up the UMS3B unit The information contained in this manual is intended to be as exact as possible Nevertheless UNITRONICS shall accept no responsibility for direct or indirect damage caused by incorrect interpretation inaccuracies or omissions in the manual Miepie SYSTEM OF SYMBOLS SYSTEM OF SYMBOLS DANGER This symbol indicates a highly hazardous procedure which might cause serious damage to equpment or people possibly even death 1f not performed properly WARNING This symbol indicates a hazardous procedure that might cause serious damage to equipment or
75. sed to perform the test DATE DD MM YYYY Test date The program checks that the date is correct 236 Hb optgpice 6 EQUIPMENT MAINTENANCE 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 10 All these data are obligatory In other words for the program to allow work to continue all the data must be included correctly Figure 5 10 Message to confirm deletion of a manufacturer name The fields MANUFACTURING NO MANUFACTURER and MACHINE TYPE form part of a test browser That is if any test has previously been performed on the machine and any of these fields 1s filled in the program will automatically fill in the rest in the case of the MANUFACTURING NO or will limit the number of possible cases see section 5 4 1 With the data entered into the template the program will generate a directory with the following structure C SAGEN_WIN Ensayos TTTFFFFFNNNN where TTT Type of machine 3 letters Power transformer TRP Distribution transformer TRD Current transformer TRI Voltage transformer TRV FFFFF Manufacturer s code 5 characters First 5 letters of the manufacturer s name If this name has less than 5 letters it will automatically fill with underscores to complete the 5 characters If the name inserted contains certain charact
76. sformer and evaluate the trend curves The advantages that characterize the UM3B method can be summarized as follows e minimum risk for the machine e reduced unavailability periods e simple performance e high degree of test automation ll on 3 UM3B EQUIPMENT 3 2 System components The following elements and accessories might be available with the equipment NOTE The XX nomenclature indicates different versions depending on the characteristics of the equipment Please consult with your sales person UM3BXX00 UM3B measuring equipment with serial number zesistance Tester Figure 3 2 Photograph of unit BEL00 Transportation bag for the measuring equipment ea eae Hb epinopics 3 UM3B EQUIPMENT Figure 3 3 Photograph of transportation bag CR00 Mains supply cable with earth 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 13 hese UM3M80M BCLOO 3 UM3B EQUIPMENT 8 metre cable hose with end clamps Each cable in the hose has a different colour blue yellow or red The biggest clamp of the strong fastening kind is for current and the smallest of a clip type is for voltage Figure 3 5 Photograph of connection cable hose Cable transportation bag _14 i 3 UM3B EQUIPMENT Bile TON Ean eG ae Ee Onin ale no gt pian A Da
77. tably 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 ELECTRIC SHOCKS The maintenance of the equipment is very simple and consists only of keeping 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 76 Hh optgpice 6 EQUIPMENT MAINTENANCE 6 1 Cleaning of equipment ATTENTION Always switch off the power switch 4 and disconnect the supply cable before cleaning the equipment Use the following to clean the equipment e A soft dry cloth if the equipment is not particularly soiled e A cloth 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 1t may cause damage or decol
78. te 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 ETPRE TECHNICAL DATA a 2m 4 By x FILE CASAGEN _WINSEnsayos TAPUNIRAZE064ADETAPUNIRAZEDE4 4 TECHNICAL SITE Laboratory SITE Unitronics DONE B r Antonio DATE 04 25 00 UM SERIAL H o015o MACHINE Power Transformer MANUFACTURER UNIFAMIS FUNCTION Test SERIAL H 28064 TYPE 50 24 20 Ho Tertiary High oltage Low Voltage Tertiary Tertiary Transformer Single phase COMPOUND WOLTAGE K 20 000 INTENSITY 1 440 Autotranstormer Three phase i PSST ein SAE N E A A T S EA ADJUSTER hd HIGH YOL REFRIGERATION ACEITE MANUFACTURE YEAR 1999 POWER MA ooo NOMINAL Vee 3950 CONNECTION GROUP Dyni Saat Saat at HANDLING NE 0 REGULACION TYPE Charge Switcher MANUFACTURER Below cover TAPS NUMBER 25 JUMP yed 500 Pina a AAA ENNA CENTRAL TAPS NUMBER i Seen ceeeeeee cess sense Pesce mene see eeeen eee Figure 5 41 Screen with technical data on analyzed transformer On all the screens that include the button there is the possibility of printing the current screen or a complete test report Figure 5 42 For more information on report printing refer to section 5 7 6 heppi 6 EQUIPMENT MAINTENANCE PRINTING C Print Report Figure 5 42 Screen or report printi
79. the difference between simple and compound voltage CURRENT A Nominal winding s current There is also a list type selection box in which the user specifies whether the winding has a regulator an adjuster or neither If the winding has a regulator adjuster there will be another series of parameters TYPE Regulator adjuster model This is defined on the corresponding nameplate MANUFACTURER Name of regulator adjuster manufacturer NO OF MANEOUVRES Number of times that the position of the transformer regulator has been changed during operation changes made during test performance are not counted REGULATION Regulator type It might be load switched or under cover _4 Hb optgpice 6 EQUIPMENT MAINTENANCE NO OF POSITIONS Number of regulation positions of the regulator adjuster JUMP Increase in magnitude between one position and the next It may be defined in volts or as a percentage of nominal voltage If defined in percentage terms the increase cannot be greater than 100 which would give rise to the appearance of an error message Figure 5 13 If necessary the jump can be programmed negative ERROR MESSAGE The field Jump of the TAP CHANGER OF THE HIGH is out of range maximum 100 Figure 5 13 Notification that the jump between regulator positions cannot exceed 100 NOMINAL POSITION Regulator adjuster tap refer to nominal magnitudes of the transforme
80. tions between the two ends of the connector testing for continuity between both extreme pins and for discontinuity between adjacent pins 80 Mesos 6 EQUIPMENT MAINTENANCE 6 4 Fuse replacement WARNING Before changing the fuse ALWAYS 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 that might damage the UM3B unit this unit incorporates a fuse stored in the lower part of the connector to the mains 5 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 The position of the fuse holder makes it necessary to disconnect the power cable Nevertheless maximum care should be taken over safety and the test cables should be disconnected from the equipment being tested Furthermore the UM3B unit should be 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 Oo RA U N Close the fuse holder 81 ase 6 EQUIPMENT MAINTENANCE 6 5 Storage and transport Any changes in the location of th
81. ure D 7 f EDA DiagHelp E a 18 x s F _WIN Ensayos USA MOMGENER100a1 1a MedEDAMOMGENER100a118 0 DIE g Hel p eee ka EDA Test Version 2 72 Manufacturer GENERAL ELECTRIC Done By ALBERTO Instrument EDAS Transverse Al Unitronics A U i Figure D 7 Screen of the application Diag_Help EDA_TRENDS Expert software of trends for rotating machines Figure D 8 EDA TRENDS x r Unitronics S A U a Figure D 8 Screen of the application Trends 105 electric APPENDIX D OTHER UNITRONICS EQUIPMENT ETP_DIAGHELP Expert software of diagnosis for transformers Figure D 9 ETP DIAGHELP edT DRTRPLAYBO5822 3 MedRDBTRDCOTRA2OB64 18 MedIDDTRDCOTRA20864 198 DIT g Hel p etp IDENTIFICATION SYSTEM Site Name UNITRONICS Manufacturer COTRADIS Technical Site Laboratorio Function test Machine Type Transformador de Distribucion Done by Victor MFR Number 20864 Date 05 06 03 TEST DIAGNOSTIC lt E Circuit Overall Indicator Electric Circuit Magnetic Circuit Geometric Circuit Dielectric Circuit Indications Dielectric Degradation CH Abnormal Aging No homogeneous aging traces al Abnormal Insulation Resistance No trace Insulation State Very weak state traces Danger Partial Discharges _Traces Presence in solid insulation Uniones SAN ai Figure D 9 Screen of the application Diag_Help ETP_TR
82. ysis Analysis E T P WINDING RESISTANCE UM 3 Select an option _ gt iH ANARA x 5 Pee Ae Se 2 H H eH nf i bee s gt era Ped Figure 5 2 Main UM3B program menu For test performance a series of machine ID data is needed which the operator must provide Later It will be possible to perform an analysis of the results based on the voltages measured and on a series of calculations Also provided is a series of utilities such us a file copying assistant or a log for the noting down of test or analysis events If the PC lacks the corresponding security key connected the possibility of performing tests will be disabled It will be possible to run analyses only on previous tests _ 30 heppi 6 EQUIPMENT MAINTENANCE 5 2 Hardware key Configuration menu The first step to carry out before executing the application is to place the USB Dongle supplied in a USB port of the PC In the case of not connecting it the software will only allow you to carry out analysis of test already performed When you connect it you will be able to carry out test For system configuration click on Config button Sucessively the following menu will appear Figure 5 3 in which one will choose the after parameters of the system amp ETPRB CONFIGURATION UM3 Control Power supply C AT MIO 16L 9 n RS 232 COM1 230

Manual de la UM-3 - Unitronics Electric

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