Testing of Gas Insulated Switchgear (GIS)

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Type Tests of Gas Insulated Switchgear

  1. Power Frequency Withstand Test
  2. Lightning Impulse Voltage Withstand Test
  3. Switching Impulse Voltage Withstand Test
  4. Making and Breaking Capability Tests
  5. Continuous Current Carrying and Temperature Rise Tests
  6. Resistance Measurement of Current Carrying Parts
  7. Mechanical Tests
  8. Partial Discharge Tests

Routine Tests on Gas Insulated Switchgear (GIS)

The below mentioned tests are performed on complete GIS assembly

  1. Power Frequency Voltage Withstand Tests on Main Circuit
  2. Partial Discharge Measurement
  3. Measurement of Resistance of Main Circuit
  4. Gas Tightness Test

Below mentioned tests are performed on the individual equivalent like

Circuit Breaker:

  1. Mechanical Operation Test of Circuit Breaker
  2. Dielectric Tests of Auxiliary and Control Circuit of Circuit Breaker
  3. Functional Tests of Auxiliary Circuits, Auxiliary Equipment and Interlocks of Circuit Breaker.

Current Transformer:

  1. Visual Verification of Rating Plates and Terminal Markings
  2. Polarity and Ratio Tests
  3. Measurement of CT Resistance, Excitation Current & Knee Point Voltage

Potential Transformer:

  1. Visual Verification of Rating Plates and Terminal Marking
  2. Measurement of Polarities and Ratio

Disconnectors/Isolators:

  1. Mechanical Operation Test
  2. Dielectric Tests on Auxiliary and Control Circuits
  3. Test on Auxiliary Circuit, Control Circuit & Auxiliary Equipment

Acceptance Tests of Gas Insulated Switchgear

The acceptance tests are the same as factory routine tests.