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Testing of breakdown voltage of transformer oil - Test data dispersion
Testing of breakdown voltage of transformer oil - Test data dispersionIEC 156 transformer oil testerThe scatter of individual breakdown voltages has been found to be very dependent on the value of the result. The graphical representation of figure 3 indicates the values of standard deviation/mean ratio ...
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Testing of breakdown voltage of transformer oil - Report
Testing of breakdown voltage of transformer oil - ReportIEC 156 automatic oil testerReport the mean value, in kilovolts, of the six breakdowns as the test result.The report shall also include: the sample identification, the value of each individual breakdown, the type of electrodes used, the frequency ...
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Testing of breakdown voltage of transformer oil - Test procedure
Testing of breakdown voltage of transformer oil - Test procedureIEC 156 oil tester9.1 Sample preparationImmediately before filling the test cell, the sample container is gently agitated and turned over several times in such a way as to ensure as far as possible a homogeneous distribution of the impurities ...
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Testing of breakdown voltage of transformer oil - Sample condition
Testing of breakdown voltage of transformer oil - Sample conditionIEC 156 oil dielectric testerThe test is carried out, unless otherwise specified, on the sample as received without drying or degassing. At the time of test, the temperatures of the test liquid and ambient air shall not differ by more ...
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Testing of breakdown voltage of transformer oil - Sampling
Testing of breakdown voltage of transformer oil - SamplingIEC 156 oil dielectric test set7.1 Sample containersSample size should be approximately three times the capacity of the test cell. Appropriate sample containers shall comply with IEC 475. An amber glass bottle is the preferred container. Clear ...
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Testing of breakdown voltage of transformer oil - test assembly preparation
Testing of breakdown voltage of transformer oil - test assembly preparationIEC 156 automatic BDV test kitIt is recommended that a separate test cell assembly be reserved for each insulating liquid type. Test assemblies shall be stored in a dry place, covered and filled with dry insulating liquid of the ...
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Testing of breakdown voltage of transformer oil - electrode preparation
Testing of breakdown voltage of transformer oil - electrode preparationIEC 156 BDV test kitNew electrodes, pitted electrodes, electrodes which have not been properly stored for a considerable time shall be cleaned by the following procedure:(1) Clean all surfaces with a suitable volatile solvent and ...
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Test assembly of testing of breakdown voltage of insulating oils
Test assembly of testing of breakdown voltage of insulating oilsIEC 156 semi-automatic oil test set4.1 Test cellThe volume of the cell shall be between 350ml and 600ml. The cell shall be made of material that is electrically insulating, transparent and chemically inert, resistant to the insulating liquid ...
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Electrical apparatus of testing of breakdown voltage of insulating oils
Electrical apparatus of testing of breakdown voltage of insulating oilsIEC 156 automatic oil test setThe electrical apparatus consists of the following units:(a) Voltage regulator(b) Step-up transformer(c) Switching system(d) Energy limiting devicesTwo or more of these units may be integrated in any ...
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Normative references of testing of breakdown voltage of insulating oils
Normative references of testing of breakdown voltage of insulating oilsIEC 156 oil test setNormative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated ...
