GE P642 User Manual

4.2 POWER SUPPLY CONNECTIONS
These should be wired with 1.5 mm PVC insulated multi-stranded copper wire terminated with M4 ring terminals.
The wir
e should have a minimum voltage rating of 300 V RMS.
Caution:
Pr
otect the auxiliary power supply wiring with a maximum 16 A high rupture capacity
(HRC) type NIT or TIA fuse.
4.3 EARTH CONNNECTION
Every device must be connected to the cubicle earthing bar using the M4 earth terminal.
Use a wir
e size of at least 2.5 mm
2
terminated with a ring terminal.
Due to the physical limitations of the ring terminal, the maximum wire size you can use is 6.0 mm
2
using ring
terminals that are not pre-insulated. If using pre insulated ring terminals, the maximum wire size is reduced to 2.63
mm
2
per ring terminal. If you need a greater cross-sectional area, use two wires in parallel, each terminated in a
separate ring terminal.
The wire should have a minimum voltage rating of 300 V RMS.
Note:
To prevent any possibility of electrolytic action between brass or copper ground conductors and the rear panel of the product,
precautions should be taken to isolate them from one another. This could be achieved in several ways, including placing a
nickel-plated or insulating washer between the conductor and the product case, or using tinned ring terminals.
4.4 CURRENT TRANSFORMERS
Current transformers would generally be wired with 2.5 mm
2
PVC insulated multi-stranded copper wire terminated
with M4 ring terminals.
Due to the physical limitations of the ring terminal, the maximum wire size you can use is 6.0 mm
2
using ring
terminals that are not pre-insulated. If using pre insulated ring terminals, the maximum wire size is reduced to 2.63
mm
2
per ring terminal. If you need a greater cross-sectional area, use two wires in parallel, each terminated in a
separate ring terminal.
The wire should have a minimum voltage rating of 300 V RMS.
Caution:
Curr
ent transformer circuits must never be fused.
Note:
If ther
e are CTs present, spring-loaded shorting contacts ensure that the terminals into which the CTs connect are shorted
before the CT contacts are broken.
Note:
For 5A C
T secondaries, we recommend using 2 x 2.5 mm
2
PVC insulated multi-stranded copper wire.
P64x Chapter 18 - Installation
P64x-TM-EN-1.3 399

GE P642 Specifications

General

Brand	GE
Model	P642
Category	Relays
Language	English