Replacement Of The Relay Board In The Power Supply Module; Replacement Of The Extra Relay Board (P442 And P444 Only); Typical Relay Board - GE MiCOM P40 Agile Technical Manual

P44x/EN MT/Hb6
(MT) 10-14
Once the relay has been reassembled after repair, it should be recommissioned in
accordance with the instructions in sections 1 to 7 (inclusive) of this document.
1.3.2.5

Replacement of the relay board in the power supply module

Remove and replace the relay board in the power supply module as described in 8.3.2.4
above.
The relay board is the one with the board with holes cut in it to allow the transformer and two
large electrolytic capacitors to protrude through. To help identify that the correct board has
been removed, Figure 8 shows the layout of the relay board.
Figure 8 - Typical Relay Board
Ensure the setting of the link (located above IDC connector) on the replacement relay board
is the same as the one being replaced before replacing the module in the relay case.
Once the relay has been reassembled after repair, it should be recommissioned in
accordance with the instructions in sections 1 to 7 (inclusive) of this document.
1.3.2.6

Replacement of the extra relay board (P442 and P444 only)

The P442 distance relay has two additional boards compared to the P441 and the P444 four
additional boards compared to the P441. Some of these boards provides extra output relays
and optically-isolated inputs.
To remove a faulty PCB, gently pull it forward and out of the case.
If the relay board is being replaced, ensure the setting of the link (located above IDC
connector) on the replacement relay board is the same as the one being replaced. To help
identify that the correct board has been removed, Figure 8 and Figure 9 illustrate the layout
of the relay and Opto boards respectively.
The replacement PCB should be carefully fitted into the appropriate slot, ensuring that it is
pushed fully back on to the rear terminal blocks.
Refit the front panel using the reverse procedure to that given in section 1.3.2. After refitting
and closing the access covers on case sizes 60TE, press on the location of the hinge-
assistance T-pieces so that they click back into the front panel moulding.
Maintenance
MiCOM P40 Agile P442, P444