INSULATION RESISTANCE TEST....

                    Insulation resistance test is to identify the healthiness of pole to ground and pole to pole insulation when breaker is in closed condition( R-N,Y-N,B-N,R-Y,Y-B,B-R), It is necessary to check the insulation when in open condition also (R-R',Y-Y',B-B').

PROCEDURE...
                              Insulation resistance  1/ Temperature.

1. Remove all external connections.
2. Apply DC voltage by using Megger.
3. Note down the readings given by Megger.
4. Discharge the voltage after completion of test.
5. Note down the temperature at the time of testing.