Grounding Strips And Their Installation; Guidelines For Wiring - NR Electric PCS-9611 Instruction Manual

11 Installation

11.7.4 Grounding Strips and their Installation

High frequency currents are produced by interference in the ground connections and because of
skin effect at these frequencies, only the surface region of the grounding strips is of consequence.
The grounding strips must therefore be of (preferably tinned) braided copper and not round copper
conductors, as the cross-section of round copper would have to be too large.
Proper terminations must be fitted to both ends (press/pinch fit and tinned) with a hole for bo lting
them firmly to the items to be connected.
The surfaces to which the grounding strips are bolted must be electrically conducting and
non-corroding.
The following figure shows the ground strip and termination.

11.7.5 Guidelines for Wiring

There are several types of cables that are used in the connection of this relay: braided copper
cable, serial communication cable etc. Recommendation of each cable:

Grounding: braided copper cable, 2.5mm

Power supply, binary inputs & outputs: brained copper cable, 1.5mm

AC voltage inputs: brained copper cable, 1.5mm

AC current inputs: brained copper cable, 2.5mm

Serial communication: 4-core shielded braided cable
11-6
Figure 11.7-2 Ground terminal of this relay
Braided
copper strip
Figure 11.7-3 Ground strip and termination
2
~ 6.0mm
Date: 2014-04-08
Press/pinch fit
cable terminal
Terminal bolt
Contact surface
2
2
2 2
~ 2.5mm
2 2
~ 6.0mm
2
~ 2.5mm
PCS-9611 Feeder Relay