Commmissioning The P59X; Visual Inspection; Insulation; External Wiring - GE MiCOM P40 Technical Manual

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Chapter 24 - Commissioning Instructions

COMMMISSIONING THE P59X

If you are setting up a scheme, which involves a P59x device, you will need to commission the P59x too. The

following instructions describe the commissioning procedure for a P59x.

Check the rating information under the top access cover on the front of the IED.

Check that the IED being tested is correct for the line or circuit.

Record the circuit reference and system details.

Check the CT secondary current rating and record the CT tap which is in use.

Carefully examine the IED to see that no physical damage has occurred since installation.

Ensure that the case earthing connections (bottom left-hand corner at the rear of the IED case) are used to

connect the IED to a local earth bar using an adequate conductor.

Insulation resistance tests are only necessary during commissioning if explicitly requested.

Isolate all wiring from the earth and test the insulation with an electronic or brushless insulation tester at a DC

voltage not exceeding 500 V. Terminals of the same circuits should be temporarily connected together.

The insulation resistance should be greater than 100 MW at 500 V.

On completion of the insulation resistance tests, ensure all external wiring is correctly reconnected to the IED.

The V.35 circuits and the X.21 circuits of the P592 and P593 respectively are isolated from all other circuits but are electrically

connected to the outer case. The circuits must therefore not be insulation or impulse tested to the case.

Check that the external wiring is correct according to the relevant IED and scheme

diagrams. Ensure that phasing/phase rotation appears to be as expected.

P591 devices operate from a DC auxiliary supply within the range of 19 V to 65 V for a 24 - 48 V version and 87.5 V

to 300 V for a 110 - 250 V version.

P446SV-TM-EN-1