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4.- PREPARATIONS BEFORE TO USE

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4.1.- Precautions in the area of installation

When  this  instrument  is  used  to  test  high  voltage  machines,  all  the
habitual  safety  procedures  and  standards  applicable  to  this  type  of
machines  should  be  adhered  to.  Ensure  in  all  cases  that  the
equipment  being  tested  is  completely  discharged  and  grounded
before touching it.

For the safety of the equipment operators or any other worker in the area, as well as

for the integrity of the system itself and to ensure that the measurement results are valid, a
series of precautions should be taken at the test location. These may be summarized as
follows:



Check that the surrounding area is appropriate (without rain or dust storms) and that
it is within the temperature / humidity margins specified for the operation (see
chapter 9: Specifications).

Check that the system supply voltage is within the specific operating
limits (see chapter 9: Specifications) and that it is grounded. This ground
should match with that of the equipment being tested. In case of doubt,
the best thing is to run a thick plaited grounding cable from the system
supply to the equipment tested.



Check that the equipment to be tested is free from its operating voltage or any
remnant voltage (it is most advisable for the machine to have been in a previous short
circuit state before the test).



Position the measuring unit and the control computer close to the equipment being
tested, as shown in Figure 4-1.



Isolate the test area by means of the necessary mechanical elements, as homologated
by the safety department of each company, such as cones, fencing, safety tapes of
different colors located at waist height, etc.

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Содержание UM2B

Страница 1: ...Read this manual before using the equipment Keep this manual with the equipment UM2B Recovery voltage Meter User manual ...

Страница 2: ......

Страница 3: ...____ 22 4 2 Equipment connection__________________________________________________ 23 4 3 Disconnection of equipment _____________________________________________ 26 5 SOFTWARE DESCRIPTION____________________________________________ 27 5 1 Introduction __________________________________________________________ 27 5 2 Hardware dongle Configuration menu____________________________________ 29 5 3 Tes...

Страница 4: ...___________________________________ 83 8 1 Return for calibration repair_____________________________________________ 83 8 2 Ordering spares _______________________________________________________ 86 8 3 Observations__________________________________________________________ 86 8 4 Authorized representatives and technical services ___________________________ 89 9 SPECIFICATIONS ____________________...

Страница 5: ...e information required for a correct operation IMPORTANT Read the entire instructions manual before starting up the UM2B unit The information contained in this manual is considered to be as accurate as possible In any case UNITRONICS will accept no responsibility for direct or indirect damage arising as a result of misinterpretation inaccuracies or omissions therein ...

Страница 6: ...or to persons if the appropriate precautions are not taken UNITRONICS S A U is an ISO9001 certified company The equipment meets the requirements of the EU Directives UM2B Recovery Voltage Meter User Manual June 2008 Fifth Edition UM2B User Manual V3_0CE doc Copyright 2008 UNITRONICS URL http www unitronics electric com All rights reserved The reproduction of any part of this manual is prohibited w...

Страница 7: ...iod This warranty does not cover any defect fault or damage caused by misuse or inadequate maintenance by the purchaser nor non authorized modifications or use outside the specifications Neither does it cover faults caused by natural disasters including fire flood earthquake etc Any opening of the equipment modification repair or attempt to repair performed without authorization shall invalidate t...

Страница 8: ...sually sufficiently indicative for the results to be evaluated Rather it is their evolution that provides the best information on the status of the winding as a result of which it is particularly useful for the results to be memorized and incorporated into databases for correlation This leads to the definition of a predictive maintenance policy consisting of the scheduling at a suitable frequency ...

Страница 9: ...asis of these to undertake interpretation Consequently start up goes hand in hand with the definition and performance of tests and the interpretation of their results For the first it is necessary to have in depth knowledge of the equipment and techniques involved while for the second there is a need for specialist technical personnel As a complement to the UM2B unit and it s associated software o...

Страница 10: ...ystem warranties that the readings obtained over time have been acquired in the same way and under the same degree of accuracy and tolerance This will allow the evolution of the readings to be studied Automatic and organized storage of results This allows the information obtained to be handled in a very simple manner Updateable system The system has been developed such that whatever new software d...

Страница 11: ...ly excessive unavailability and if possible none The data and results obtained should offer at least some information allowing the operator performing the test to make an immediate interpretation The set of data obtained should allow for storage on data processing media such that they be simple to transmit for in depth study by specialists who will obtain the maximum information from the data acqu...

Страница 12: ...ent circuit there will be a multitude of such elements in order to reflect the distributed nature of this behavior The test to be performed aims to determine the equivalent time constants Rp Cp the measure and evolution of which are determining factors as regards the current and future status of the dielectric The test consists of inserting over a time T a previously established voltage of up to 2...

Страница 13: ...sulation this is Ra The insulation resistance varies directly with the thickness of the insulation and inversely with the area tested 2 Short circuiting of the sample At this moment the current is initiated with a high value in inverse direction to the period before corresponding to the rapid discharge of Cg while Ra does not actuate due to the short circuit having a lower resistance There will be...

Страница 14: ... out each 10ºC of thermal increment for the same increment to the same dielectric his resistance is halved Test voltage Insulation measurements will be performed at test voltage values agree with the working voltage of the machines to be tested in order not to cause degradation to their insulations Previous charge effect A factor that affects insulation and dielectric absorption measurements is th...

Страница 15: ...rm a discharge period previous to the test that will make consecutive test easy to exactly compare Anyway in some case it could be appreciated slight differences between the insulation measurement performed with the Recovery Voltage software and the one performed with the Insulation Resistance software ETPRA This is due to that the Recovery Voltage measurement software uses one of the charging cyc...

Страница 16: ...eans of a data acquisition system and a computer application for the performance of calculations Figure 3 1 Appearance of the measurement system Once the data have been obtained enough information is available for diagnosis of the current status of the transformer and for assessment of the trend curves The advantages that characterize the UM2B method may be summarized as follows minimum risk for t...

Страница 17: ...sories NOTE The XX nomenclature indicates different versions depending on the characteristics of the equipment Please consult with your sales person REF No DESCRIPTION UM2BXX UM2B measuring equipment with serial number Figure 3 2 Measuring unit BEL00 Measuring equipment transport bag Figure 3 3 Transport bag ...

Страница 18: ...t The cable must be shielded Figure 3 4 Serial cable M8AT0L 8 metre long high voltage shielded measuring cables with wide opening clip pincers at one end and high voltage connectors at the other The polarity is indicated by the color of the clips and connectors red for positive and black for negative These must be shielded Figure 3 5 High voltage cables with power clips ...

Страница 19: ...ol software UM2BMUXX The present user manual RAFVDM00 Four power sockets protected against voltage surges differential currents and overcurrent This incorporates a voltmeter for direct verification of the supply voltage indicator of ground connection and terminals for ground connection Figure 3 7 Power Socket ...

Страница 20: ...3 UM2B EQUIPMENT 18 MM00 Rigid transport case with reinforced external protection and internal padded lining of high density foam rubber Figure 3 8 Transport Case ...

Страница 21: ...on of equipment Figure 3 9 shows a drawing of the UM2B unit the upper part corresponding to the front panel and the lower to the rear panel The function of each element of the unit is described below Figure 3 9 Front and rear panel of the unit ...

Страница 22: ...ications with the PC 4 Equipment connection switch This is operated to connect the equipment to the electrical mains when the PC software so indicates 5 Mains input connection This includes a fuse holder and a spare fuse 6 Unit nameplate 7 PC communications connector 8 Connectors for high voltage cables running to equipment being tested The rest of the indicators warnings appear on the computer sc...

Страница 23: ...NING THE EQUIPMENT RECEIVE TECHNICAL TRAINING Likewise all persons performing or witnessing a test should take the necessary safety precautions in order to avoid any contact with the parts to be analyzed or forming part of the measurement system remaining at some distance from them unless these parts are free from voltage and grounded Measurements performed using the UM2B system are carried out OF...

Страница 24: ... the temperature humidity margins specified for the operation see chapter 9 Specifications Check that the system supply voltage is within the specific operating limits see chapter 9 Specifications and that it is grounded This ground should match with that of the equipment being tested In case of doubt the best thing is to run a thick plaited grounding cable from the system supply to the equipment ...

Страница 25: ...puter should be located close to the equipment to be analyzed as shown in Figure 4 1 To start up the equipment carry out the following instructions in the order presented the different elements of the panels in Figure 3 9 are referred to in brackets Figure 4 1 Disposition of the test elements Connection of PC to UM2B This connection is accomplished with the series cable connected to the serial com...

Страница 26: ...ill be put on short circuit The phases may be interconnected by means of bare copper wire if the distances are short and there is no risk of short circuiting to ground otherwise a proper insulating cable should be used Finally connect positive negative terminal according to software indications Never remove high voltage connectors during test Figure 4 2 Configuration of the test V max 2000 V dc I ...

Страница 27: ...ING SHOULD BE INTERCONNECTED Connection of UM2B equipment to electrical mains This connection is accomplished by running the power cable from 5 to a mains socket The supply voltage should be checked to ensure that it is within the operating limits see chapter 9 Specifications and a check should made to ensure that the socket has an operative ground Once the different parts of the equipment have be...

Страница 28: ...l discharge the machine analyzed Meanwhile the computer will show a message indicating that this operation is being carried out Consequently the UM2B unit should be turned off when so indicated by the control software following the measurements In some transformers discharging may take several minutes Consequently it is good safety practice to use rubber gloves when handling the connecting clips W...

Страница 29: ...Analysis System Figure 5 1 which is located in the folder of the same name under Start Programs Figure 5 1 Test menu for power transformers This screen shows all the tests that may be performed on the different machines and or components If any of the options is shown disabled it will be because the customer does not have the corresponding application which he may acquire at any time see chapter 8...

Страница 30: ...scribed together because of their similarity detailing when appear the differences or particularities that offer the Insulating Resistance software ETPRA The main menu of the application offers basically two operating options Test performance Test Analysis of results Analysis Figure 5 2 Main menu of the UM2B test recovery voltage For performance of the test a series of data identifying the machine...

Страница 31: ...tem Figure 5 3 Configuration Screen Control the communication with the unit is performed by means of the serial port RS 232 You will need to indicate which port will be used COM1 COM4 by means of the existent ring 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...

Страница 32: ...AA or month day year MM DD AAAA Temperature Select the units used in the temperature Fahrenheit ºF or centigrade ºC 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 ...

Страница 33: ...ad maintained all it s phases ground connected the longest possible time before the test The minimun recommended length is of an hour or four times the length of the longest cycle of voltage insertion of a previous test This way the initial conditions are always the same and absorption capacitors see figure 2 1 could be considered discharged Also if tests with another measuring equipment are going...

Страница 34: ...system will ask for confirmation of the intention to begin a new test Figure 5 5 Figure 5 5 Warning of new test If the analysis of a previous test were being performed and this were interrupted nothing will happen unless any value that might affect the analysis had been modified in which case a screen such as the one shown in Figure 5 6 will appear Figure 5 6 Warning to save changes ...

Страница 35: ...liminating all incomplete tests or beginning a new test Figure 5 7 Figure 5 7 Warning of incomplete tests 5 3 1 Test identification When the operator decides to perform a test the first thing he should do is identify the transformer on which it is to be carried out which will serve to give a name to the file containing the test data Test identification This identification is carried out on the bas...

Страница 36: ...rer is selected from a list If the manufacturer in question does not appear select other to input the name of the new manufacturer Figure 5 9 A similar window appears in all cases when the other option is available Figure 5 9 Enter manufacturer s name MACHINE TYPE The type of machine is selected from a list that cannot be modified by the operator ...

Страница 37: ...M2B with which the test is performed DATE DD MM YY Date of the test The program checks that this date is correct In all those fields in which new items may be added to a list it is also possible to delete them by locating the mouse cursor over the item in question and clicking with the right hand button Figure 5 10 The introduction of all these data is obligatory in other words all the data should...

Страница 38: ...hyphens until the five characters are completed _ If the name input contains any of the characters in brackets these will be replaced automatically by the characters shown below this occurring only when files are created in the PC and not as regards what the operator sees Alt Gr 6 ß Alt 225 µ Alt 230 þ Alt 231 Alt 221 Alt 244 Alt 21 NNN Manufacturing No Identifier of transformer For example the te...

Страница 39: ... in C SAGEN_WIN Ensayos whenever a process is completed This file which is called medTDRTTTFFFFFNNNN tnn serves as a back up in the event of anomalous failure of the system such that the program may continue at the last process performed The file remains in effect only until the test is successfully performed as from which moment the definitive file seen above is generated and this one is deleted ...

Страница 40: ...nsformer has or does not have a tertiary winding Single Phase Three phase This indicates whether the transformer is single phase or three phase Y OF MANUFACTURING Year in which the transformer was manufactured COOLING Type of transformer cooling This may be by oil or dry POWER MVA Maximum power of the transformer in millions of volt amperes NOMINAL Vdc Nominal short circuit voltage in percentage t...

Страница 41: ...er has a third winding in addition to the high and low voltage windings Figure 5 11 Enter the technical data of the transformer Other parameters for each of the windings may be selected on the right such as the following COMPOUND VOLTAGE KV Nominal voltage between two phases of the winding In the case of delta connections this matches with the simple or phase voltage For more information refer to ...

Страница 42: ...or adjuster manufacturer N OF OPERATIONS Number of times that the position of the transformer regulator has been modified in operation modifications undergone during test performance do not count REGULATION Type of regulator May be under load a switching regulator or under cover No OF POSITIONS Number of regulations positions of the regulator adjuster STEP Increase in magnitude between one positio...

Страница 43: ...al magnitudes of the transformer voltage current etc refer No OF CENTRAL POSITIONS Number of positions for the nominal position maximum of 6 Normally there will be one only If there is more than one the nomenclature will consist of the central position plus a letter indicating the number of the central position For example 12a 12b ...

Страница 44: ...the transformer connection mode if the measurement is performed between high and low voltage or between high and tertiary and the temperature of the transformer Depending on the time base selected there will be a larger or smaller number of measurement cycles the longer the time the smaller the number of cycles Also indicates in function of cycles number and time base minimum test duration and max...

Страница 45: ...stance Software ETPRA In this screen Figure 5 14 b are selected the voltage for the test the time that is going to last the connection mode of the transformer and his temperature Figure 5 14 b Menu for test configuration Insulation Resistance ...

Страница 46: ...urned on and that the serial cable between the computer and the UM2B is correctly connected A screen appears with instructions on how to proceed as regards connection of the unit Figure 5 15 Any errors in this connection protocol are indicated by means of luminous signals if the LED located to the left of the text flashes it means that the condition is not met Likewise the equipment should be conn...

Страница 47: ...ram will indicate that it is attempting to connect to the UM2B unit Figure 5 16 Figure 5 16 Message indicating the PC is attempting to establish communications with the unit ATTENTION For correct operation of the equipment it is very important that all the conditions listed in this window are met Once all the conditions are met the OK and NEXT buttons will be enabled ...

Страница 48: ...the measurement and indicators showing the number of cycles remaining to be performed the time that has elapsed since initiation of the test and the time remaining for completion of the current cycle Figure 5 17 Screen for test evolution Recovery Voltage The number of cycles that the test will last depends on the time base selected in configuration of the measurement if this is large the number of...

Страница 49: ...5 SOFTWARE DESCRIPTION 47 Figure 5 18 Warning message Figure 5 19 a Measurement Screen Recovery Voltage ...

Страница 50: ...he screen shows information on the insulation resistance at two moments in time minutes 1 and 10 as well as the polarization index and test voltage To the right are two indicators one indicates the complete elapsed time including the machine s discharge time and the other the time it will take to measure the insulation resistance This last one will pause at the moment in which the unit is performi...

Страница 51: ...ertake calibration of the UM2B showing the message that appears in Figure 5 21 throughout the process The indicator bar shows the time last in seconds Figure 5 21 Calibration message In case the machine is not completely discharged the unit will detect it and it will warn the user with the following message giving option to discharge it Figure 5 22 If this discharge is not performed the graph of r...

Страница 52: ...rmative message in which indicates that the connections should be revised Figure 5 23 Once revised it will be necessary to repeat the test Figure 5 23 Short circuit message In the case of not existing short circuit voltage will be applied to the transformer for the period established Figure 2 2 phase 1 in the time base on the previous screen the machine will then be short circuited and the recover...

Страница 53: ...5 26 will be displayed Figure 5 26 Final discharge of the transformer If there is no problem the program will show Figure 5 27 on completion of measurement for all the cycles indicating that the test has been completed The unit will indicate the end of the test to the user by means of a series of acoustic sounds to claim his attention This is specially useful if the user is far from the unit perfo...

Страница 54: ... Voltage and Peak Time Figure 5 28 Process of analysis of the test results To perform an analysis click on the Analysis button on the main menu This button is used to begin a new analysis regardless of the degree of execution of the program If a test was being performed previously the system will ask for confirmation of the step Figure 5 29 Figure 5 29 Confirmation of change to analysis If the ana...

Страница 55: ...d on showing the serial numbers of the machines tested and the rest of the fields will be filled in automatically If the search is performed manually the serial number has to be input If any test on this transformer is found the rest of the fields will be filled in otherwise they will be left blank indicating that there is no test on this machine If the search is performed by manufacturer and mach...

Страница 56: ... the button and the file selector will appear Figure 5 32 this may be used to select the test to be analyzed for this machine Figure 5 32 Selector of files to analyze Following the selection of the test this is loaded into the memory by clicking twice on the test itself or on the Load button Prior to doing this the program checks that it is actually a UM2B test file if this is the case it is loade...

Страница 57: ...m with the exception of the data identifying the test This is indicated by the background of the indicators if the background is yellow the field cannot be modified if it is white the data may be changed This is valid for the entire analysis The name of the file subject to analysis is shown all the time in the upper part of the screen Figure 5 34 Analysis screen technical data On all screens in wh...

Страница 58: ...warning reminding the operator that data have been modified and that this may affect certain measurements Figure 5 36 Figure 5 36 Warning of data changes The normal thing will be not to continue as a result of which when the NO button is pressed a screen will appear stating that the CANCEL button should be pressed if the change is not to take effect Figure 5 37 Figure 5 37 Warning screen ...

Страница 59: ...ge at which the test is performed along with other data such as the time constant and polarization index Below these informative data there is a graphic showing the evolution of the recovery voltage throughout the test see Figure 5 38 To the right of this graphic there are two columns showing the times at which each recovery voltage sample has been taken and the corresponding value The operator ma...

Страница 60: ...e display modes may be chosen Linear curve Figure 5 38 on which each point sampled is connected to the adjacent points by a straight line Interpolated curve Figure 5 39 where the points are connected by curves and Both Figure 5 40 with the linear and interpolated curves displayed on the same graphic Figure 5 39 Recovery graph Interpolated plot Figure 5 40 Recovery graph both plot ...

Страница 61: ...age it is shown the time a dot it takes to the dielectric to arrive to each cycle s maximum recovery voltage sample In this case the operator cannot move around the graphic but as in the previous case the rise time to the recovery maximum at different cycles of the test is shown to the right Figure 5 41 Analysis Recovery peak time ...

Страница 62: ... transformer is different the program will carry out a conversion to offer it at 20ºC The measurement of insulation resistance is independent from the rest of the measurements the selected time base is not taken into account and is performed in a cycle of more than 10 min or at the end of the test with a sample taken every minute Figure 5 42 a Analysis Graph of insulation resistance Recovery Volta...

Страница 63: ...ntering the temperature of the test or did not know that moment the test temperature So entering the temperature all the measurements would appear compensated to that value Take to the screen the real measurement taken by the unit If the user wishes the measurement without any compensation just have to enter the value 20 20ºC This way will get the actual uncompensated temperature Insulation Resist...

Страница 64: ...at allows tests to be copied to a location different from that originally used by the program with the possibility for both the point of origin and the destination to be fixed flexible or network units When the is pressed Figure 5 43 will appear Figure 5 43 Assistant for test duplication In Origin the name of the test file to be recorded is selected and in Destination the directory in which the te...

Страница 65: ...n will be activated whenever a test or analysis is being performed Figure 5 44 Remark editing page The information is stored in 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 a previous test or analysis has already written an observation this observation will appear when the Remarks button is presse...

Страница 66: ... 46 a The 2nd page includes the observations made during the test or analysis in its upper part and in the middle a brief summary of the measures performed In the lower part are shown the measurements taken at different moments during the test each sample time is twice the previous one as from the time base established Figure 5 47 a The 3rd page shows the recovery voltage rise time and insulation ...

Страница 67: ...5 SOFTWARE DESCRIPTION 65 Figure 5 46 a First page of the report Recovery Voltage ...

Страница 68: ...5 SOFTWARE DESCRIPTION 66 Figure 5 47 a Second page of report Recovery Voltage ...

Страница 69: ...5 SOFTWARE DESCRIPTION 67 Figure 5 48 Third page of report Recovery Voltage ...

Страница 70: ...5 SOFTWARE DESCRIPTION 68 Figure 5 46 b First page of the report Insulation Resistance ...

Страница 71: ...5 SOFTWARE DESCRIPTION 69 Figure 5 47 b Second page of the report Insulation Resistance ...

Страница 72: ...the following Data on the license Data on the version of the program Figure 5 49 Cover screen If an internet connection is available when clicking the UNITRONICS web page the software will load the predetermined windows explorer with our web page This cover screen also appears when the program is executed ...

Страница 73: ...o ahead Figure 5 50 and if this is the case offers the possibility of saving the data entered Figure 5 51 In affirmative case a file will be created in the directory C SAGEN_WIN Ensayos with those data see section 5 3 1 but otherwise the file will not be created Figure 5 50 Warning for program exiting Figure 5 51 Warning of data loss If an analysis was being performed and any data have been modifi...

Страница 74: ...5 SOFTWARE DESCRIPTION 72 Finally the program issues a reminder to switch off the measuring unit Figure 5 52 Figure 5 52 Warning to switch off the unit ...

Страница 75: ...ternally and making sure the cables supplied are also in good condition If the fuse blows it should be replaced with one of identical characteristics as described in section 6 4 Replacement of fuses If a fuse should blow continuously the equipment should be sent for repair see section 8 1 Return for calibration repair In order to maintain its values of accuracy the equipment should be calibrated a...

Страница 76: ...ean the equipment and cables a soft dry cloth if the equipment is not particularly dirty a cloth soaked in a diluted neutral cleaning product if the equipment is very dirty or has been in store for some time After checking that the shell is completely dry use a soft dry cloth to clean ATENTION Never use alcohol or any other abrasive product to clean the shell since this may cause damage or decolou...

Страница 77: ...f the cables are damaged they should be sent for repair to an authorized technical service or new cables should be acquired see chapter 8 This is applicable also to the cable and unit connectors Special care should be taken with the serial cable for connection of the PC since it is in charge of controlling the unit It is very important not to tread on or move the cables during testing since this m...

Страница 78: ...rrect state you can do this simple test We only need a multimeter that indicates us the electric continuity or discontinuity To check each cable we will come in the following way 1 Disconnect the high voltage cable in their both ends 2 Check the discontinuity between active and body We take the high voltage s connector that goes into the UM2B unit We place one multimeter test tip in contact with t...

Страница 79: ... s interior tip active and the other multimeter test tips in contact with the clamp that is in the other cable end The multimeter should say continuity Figure 6 2 Continuity check between cable ends 4 Previous checks could be performed by the user but it should also be checked dielectric rigidity and insulation resistance of the cable should they be damaged This two last verifications only could b...

Страница 80: ... and in an adjacent compartment outer a spare The very arrangement of the fuse holder makes it necessary to disconnect the power cable Nevertheless great care should be taken to ensure safety and the cables should be disconnected from the equipment being tested Also the UM2B should be moved away from this equipment After having carried out the aforementioned safety processes replace the fuse as fo...

Страница 81: ...e exposed to high levels of dust Not be exposed to high levels of humidity Not be exposed to active gases Not be exposed to extreme temperatures The recommended conditions for storage are describe in the system specifications See chapter 9 3 Specification In areas of very high levels of humidity desiccant bags should be used If the equipment has been in storage for a very long period of time it is...

Страница 82: ... of the test voltage indicating LED s 1 lights up One of the indicators has blown Send the equipment to an authorized technical service The equipment is faulty Send the equipment to an authorized technical service One external equipment sets his voltage on the cables Review the measurement s conditions and that the machine is fully discharged The equipment generates voltage but this is not present...

Страница 83: ...thorized technical service The message UM2B does not respond appears on the screen The unit is not turned on Turn on the unit The serial cable is not properly connected Connect properly or review in configuration if the COMX port is the correct one Short circuit is detected during the test Measurement cables are damaged Check measurement cables Equipment under test is damaged If proper repeat the ...

Страница 84: ...ates on measurement cables is very high delayed measurement bigger than 3mA and it is possible that a short circuit exists in the machine to measure measure connections or cables of high Machine to test Damaged machine Insulation Resistance is very low Measure connections Check that test clamps are not in short circuit or that the connections between bushing and chassis are properly insulated High...

Страница 85: ...n repair If after having revised chapter 7 Troubleshooting the equipment is concluded to need repair calibration it is essential that the following instructions are adhered to 1 Copy and fill in the sheets that appear on the following pages and attach them to the equipment 2 Pack the equipment or accessories using an appropriate transport container When returning the equipment for repair the most ...

Страница 86: ...ning Calibration Calibration certificate required Repair Fill in only in case of problems Is the equipment under warranty Yes No Date on which fault occurred Fault detected in equipment Power LED does not light up One of the test voltage indicator LED s does not light up Fuse has blown repeatedly No connection established between PC and equipment PC communications cable deteriorated High voltage c...

Страница 87: ...8 TECHNICAL SUPPORT 85 Description of fault Materials returned on of of the year Table 8 1 ...

Страница 88: ... good to gain insight into the degree of satisfaction of the customer and to know what new performance characteristics he would like to see or which he would eliminate with a view to developing future system hardware software improvements If you have any observation suggestion to make as regards the software hardware cabling operation characteristics etc please photocopy the following 2 sheets fil...

Страница 89: ...ince Contact person e mail Telephone Fax UM2B serial No Date of acquisition Degree of satisfaction Very satisfied Satisfied Dissatisfied Fairly satisfied Not very satisfied Very dissatisfied What safety elements would you add What new calculations should it perform ...

Страница 90: ...8 TECHNICAL SUPPORT 88 What standard optional elements would you add What elements would you remove What defects does the system have on of of the year Table 8 2 ...

Страница 91: ...enida Fuente Nueva 5 28709 San Sebastián 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 Technical Service Avenida Fuente Nueva 5 28709 San Sebastián de los Reyes Madrid SPAIN Tel 34 91 540 01 25 Fax 34 91 653 98 10 URL http www unitronics electric com ...

Страница 92: ...ply Value and kind Replaceable by operator Rear Panel FUS 1 115 V 630 mA T 250 Vac 20x5 230 V 315 mA T 250 Vac 20x5 Non Replaceable by operator Microcontroller F1 630 mA T 250 Vac TR5 F2 Main Board F1 115 V 500 mA T 250Vac TR5 230 V 250 mA T 250Vac TR5 F2 115 V 250 mA T 250Vac TR5 230 V 160 mA T 250Vac TR5 F3 160 mA F 250 Vac TR5 F4 160 mA F 250 Vac TR5 F5 200 mA T 250Vac TR5 F6 F7 315 mA T 250Vac...

Страница 93: ...rement 0 1000 V 3 3 digits 1V Isolation measurement 2000 V 1M 100 G 3 3 digits 2000 V 100 G 200 G 5 3 digits 2000 V 200 G 2 T 20 3 digits Operation temperature 5 35ºC 41 95 ºF Operation humidity 10 80 Storage temperature 5 75ºC 41 167 ºF Storage humidity 5 80 Table 9 3 Unit specifications In determined conditions of presence of transitory phenomenon with respect to earth it may appear variations i...

Страница 94: ... RAM 32 MB RAM VGA colour monitor Floppy disk drive CD ROM drive 9 5 Additional specifications Other characteristics Power on indicator Luminous test voltage indicator 4 values Luminous indicator of active communication with PC Control of output voltage by use of programmable voltage source controlled from PC Parameters used Recovery voltage Insulation resistance Polarization index Time constant ...

Страница 95: ...APPENDIX B CONTROL SOFTWARE 93 APPENDIX A CE CONFORMITY DECLARATION ...

Страница 96: ...APPENDIX B CONTROL SOFTWARE 94 APPENDIX B CONTROL SOFTWARE INSTALLATION The documentation referred to the control software installation manual UM2B can be found in file SETUP_TR_ING ...

Страница 97: ...n a common database such that recovering the tests performed on any machine is a simple matter All the hardware and applications have been developed by the UNITRONICS Design Department thus providing a guaranteed maintenance service In developing all these systems actual tests have been carried out at the same installations in which the equipment is later to operate thus ensuring suitable operatio...

Страница 98: ...lable applications EDAIII analysis of motor and alternator insulations Figure C 1 Figure C 1 Photograph of EDAIII equipment ETP evaluation of power transformers UM1B measurement of transformation ratio Figure C 2 Figure C 2 Photograph of UM1B equipment ...

Страница 99: ... UNITRONICS EQUIPMENTS 97 UM2B measurement of recovery voltage and insulation Figure C 3 Figure C 3 Photograph of UM2B equipment UM3B measurement of winding resistance Figure C 4 Figure C 4 Photograph of UM3B equipment ...

Страница 100: ... C OTHER UNITRONICS EQUIPMENTS 98 UM5B Short circuit impedance Figure C 5 Figure C 5 Photograph of UM5B equipment RAFVDM Power Socket Supply earth detecting Figure C 6 Figure C 6 Photograph of RAFVDM equipment ...

Страница 101: ... 99 EDA_DIAGHELP Expert software of diagnosis for rotating machines Figure C 7 Figure C 7 Screen of the application Diag_Help EDA_TRENDS Expert software of trends for rotating machines Figure C 8 Figure C 8 Screen of the application Trends ...

Страница 102: ...ENTS 100 ETP_DIAGHELP Expert software of diagnosis for transformers Figure C 9 Figure C 9 Screen of the application DiagHelp ETP_TRENDS Expert software of trends for transformers Figure C 10 Figure C 10 Screen of the application Trends ...

Страница 103: ...nt Substance that allows to fix a dielectric in a surface Alternator Set of apparatus combined to transform kinetic energy into alternating current Assembly Functional unit forming part of an item and made up in turn of components motor turbine Autotransformer Device capable of changing the level of magnitude between input and output similar to a transformer but with the difference that it consist...

Страница 104: ...Material that allows an electrical current to pass continuously when subjected to a difference in potential Corrosion Destruction of a material usually a metal or of its properties as a result of reaction with a medium Corrective Maintenance Maintenance carried out on an item once a breakdown has occurred returning it to its Admissible Condition for use Corrective maintenance may or may not be sch...

Страница 105: ...t of the resistance of a dielectric to dielectric rupture under the influence of strong electrical fields normally expressed in volts per centimeter Equipment Complex unit of higher order made up of assemblies components and parts grouped to form a functional system Equivalent to the term machine Emergency Maintenance Corrective maintenance required to avoid serious consequences Failure Loss of th...

Страница 106: ...rtain wavelength when polarized Machine Complex unit of higher order made up of assemblies components and parts grouped to form a functional system Equivalent to the term equipment Magnetic package All the elements that make up the electromagnetic coupler that transforms electrical energy into magnetic energy for this in turn to be transformed into mechanical energy rotating machines or once again...

Страница 107: ... applied to a circuit by the current circulating in it This is measured in watts W Predictive Maintenance Preventive maintenance based on knowledge of the status of an item through the periodic or continuous measurement of a significant parameter The intervention of Maintenance is conditioned to the prompt detection of symptoms of failure Preventive Maintenance Maintenance consisting of performing...

Страница 108: ...onverters Rotor Rotating part of a machine Rupture Breakdown causing the unavailability of an item Scheduled Maintenance Preventive maintenance performed at previously determined intervals of time number of operations stroke etc Short circuit The joining of two points subjected to different voltages across a very small resistance bridge The current reaches its maximum value Short circuit voltage T...

Страница 109: ...lts V Winding Set of spirals forming an electrical circuit associated with one of the voltages for which the transformer has been designed Current conducting part of a machine Wye connection Y connection Connection of windings in which the end of each phase winding of a three phase transformer or of each winding of the same voltage assigned to single phase transformers constituting a three phase b...

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