GE Industrial Solutions Arc Vault Protection System - Manual (Page 30)

Arc Vault™ Protection System DEH-41483 Rev. 3
Equipment Installation
22 © 2011 General Electric All Rights Reserved
Where the cables enter the section, they can be lashed to
optional cable supports at the rear of the cable
compartment as required.
Mechanical cable terminals are normally included with the
switchgear (compression terminals are supplied when
ordered) and are mounted at the ends of the breaker
runbacks in the cable compartment. Carefully follow the
cable manufacturer's recommendations for installation of
cable.
Install the cables in the proper path to the terminals, using
temporary lashing if required. Cut the cables to the proper
length. Strip the insulation to the desired dimension, being
careful not to damage any strands.
For copper cables, coat the wires with GE lubricating grease
D6A15A2, insert the cables into the terminals, and tighten
per torque values in Table A-2 in Appendix A.
For aluminum cables, wire brush the wire strands
thoroughly. Immediately after wire brushing, coat the cable
strands with a quality oxide inhibiting compound such as
Penetrox A. Insert exposed wires into the terminals and
tighten the set screws in accordance with values shown in
the torque Table A-2 in Appendix A.
CAUTION
The torque values shown in the table are for dry
threads only. Do not grease or otherwise lubricate the
threads on the cable terminals as this will permit
over-tightening of the screw and possible damage to
the terminal or cable.
This should result in the oozing of compound material from
between individual strands. Wipe off any excess compound.
Bolt the cable terminal connectors to the ends of the bars in
the cable compartment. A non-oxidizing grease, such as GE
lubricating grease D6A15A2 furnished with each
equipment, should be used at these connection surfaces.
The bolts should be tightened in accordance with values
shown in the torque Table A-2 in Appendix A.
Lash the cables securely to the cable support, if present, to
take their weight off the runbacks and to brace them
against short circuit forces in the event of a fault.
WARNING
Risk of shock. The equipment must be completely de-
energized before installing or removing the arc fault
device. Failure to do so may result in death or serious
injury.
Figure 4-8 Typical cable lashing
The cable supports in Figure 4-8 can be optionally ordered
from the factory. The following instructions for cable
lashing should be used as a guide. Run and bend the main
cable in a most convenient orientation, making sure the
main cable has been located directly up against any cable
braces (if present) before it connects to the main cable
terminals.
Using a 3/8 inch diameter continuous nylon rope or
equivalent (minimum 2000 pounds tensile strength) at 6
inches from the main cable terminals, make five revolutions
around the "A" and "B" phase main cables, making sure the
rope does not overlap. Make five revolutions around the "B"
and "C" phase main cables. With the remaining rope, wrap
around the main cable lashing between the "B" and "C"
phase and the cable brace (if present) with a minimum of 5
revolutions getting as much revolutions as possible
between the phases. Continue wrapping between the "A"
and "B" phase around the main cable lashing and the cable
brace (if present) with a minimum of 5 revolutions getting as
much revolutions as possible between the phases. Securely
tie off the remaining rope. Repeat this lashing at every 6-
inch interval.
Relays and Control Devices
Remove all blocking on relays and devices as shown in the
instructions accompanying the devices.
Nylon rope – 3/8
inch (9.5 mm)
diameter.
Minimum of 5
wraps
6 inches
(152 mm)