External Wiring; Insulation; Location Of Securing Screws For Terminal Blocks; Current Transformer Shorting Contact Locations - GE MiCOM P40 Agile Technical Manual

P44x/EN CM/Hb6
(CM) 9-10
Heavy duty terminal block
Figure 1:

Location of Securing Screws for Terminal Blocks

Current Input
IA
IB
IC
IM
Table 1 - Current Transformer Shorting Contact Locations
4.1.3

External Wiring

Check the external wiring is correct to the relevant relay diagram or scheme diagram. The
relay diagram number appears on the rating label under the top access cover on the front of
the relay. The corresponding connection diagram will have been supplied with the Alstom
Grid order acknowledgement for the relay.
If a test block is provided, the connections should be checked against the scheme (wiring)
diagram. It is recommended that the supply connections are to the live side of the test block
(coloured orange with the odd numbered terminals (1, 3, 5, 7 etc.)). The auxiliary supply is
normally routed via terminals 13 (supply positive) and 15 (supply negative), with terminals 14
and 16 connected to the relay's positive and negative auxiliary supply terminals respectively.
However, check the wiring against the schematic diagram for the installation to ensure
compliance with the customer's normal practice.
4.1.4

Insulation

Insulation resistance tests are only necessary during commissioning if it is required for them
to be done and they have not been performed during installation.
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.
MiCOM P40 Agile P442, P444
Medium duty terminal block
Shorting contact between terminals
1A CT's 5A CT's
C3-C2 C1-C2
C6-C5 C4-C5
C9-C8 C7-C8
C12-C11 C10-C11
Commissioning
P3004ENa