Winding Resistance Test Procedure of Current Transformer

To guide the responsible persons in conducting Current Transformer Winding Resistance Test.

SAFETY PRECAUTIONS – The following Safety precautions shall be taken in consideration prior, during and after conducting the test measurements.

• Safety tagging shall be implemented.
• Isolate the Area by Safety Warning Tape.
• Keep a Safe Distance from the device being tested.
• Wear Appropriate Personal Protective Equipment(PPE) Prior to starting any testing activity.
• Implementation of Proper Grounding.

Winding Resistance Test Procedure

TEST EQUIPMENTS: OMICRON CPC-100

1. Setup the CALIBRATED test instrument in a firm, reasonably level base and dry area.
2. Identify test parameters and terminals for proper connections.
3. Set-up and effectively ground the test instrument. Supply voltage, 110Vac or 230Vac. Conduct testing as per the
   following illustrated test Connections:

4. Power ON the Test Instrument and select RWinding Test Card
5. Properly fill-up test settings:
6. Press I/O (test start/stop) push-button to start the test.
7. Save test card for printing.
   7.1 For multi-tap core/s, create and save test card for each tap tested.
8. Note and record all necessary test parameters
9. Evaluate test result as per general standard ratings and accuracy classes for current transformers.