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  Testing of current transformer   Current Transformer (C.T) and Theory and operation of current transformer

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SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generators

Testing of current transformer

The following testing are done at the current transformer .Which is given below:-

i)Type Testes:-
  1. Verification of terminal marking and polarity.
  2. High voltage power frequency test on primary windings.
  3. Over voltage inter-turn test.
  4. Determination of error according to requirements of appropriate accuracy class.
  5. Short time current test.
  6. Temperature rise test.
  7. Impulse voltage test for current transformer for service in electrically exposed installations.

Special type testing may be done on current transformer .

  1. High voltage power frequency wet withstand voltage test on outdoor current transformer.
  2. Partial discharge test.
(ii) Routine Tests:-
  1. Verification of terminal markings and polarity.
  2. High voltage power frequency test on primary windings.
  3. High voltage power frequency test on secondary windings.
  4. Over voltage inter turn test.
  5. Determination of error according to the requirements of appropriate accuracy class.
  6. Accuracy test.

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