GE Industrial Solutions EntelliGuard R AKD-6 - Manual (Page 35)

34 EntelliGuard R Circuit Breaker Retrofill AKD-6 Installation Manual DEH-41548 02/12
Install Neutral Disconnect Assembly (Bus Compartment)
• It must be ensured that the supply power to
the compartment is turned off/ compartment is
de-energized for all the incoming and outgoing
circuits of the LVS prior to any work being
conducted on it.
•
During the installation and related work on the
equipment, it must be ensured that the operator
is using the prescribed PPE for the specified tasks.
• Ensure only qualified personnel install, operate, service, and maintain all electrical equipment.
The AKD-6 EntelliGuard R Circuit Breaker uses an air-core Rogowski Current sensor to measure current level
vs. an iron core CTs used in the legacy AK, AKR breakers. For the Retrofill to calculate the current levels on a
4-wire circuit, the Neutral Iron Core CT in the cable compartment needs to be replaced with a Rogowski style
CT
(Figure 28 ). Consult the table for the appropriate Rogowski assembly for the switchgear ( Table 7 ).
The Rogowski CT comes mounted on copper bars matching the same hole-pattern as the existing neutral bar. The
external neutral Rogowski mounting kit comes with three mounting brackets, two fixing screws, two cable ties, one
2m (78.75 inches) long twisted pair extension lead and one neutral Rogowski coil.
Table 7. AKD-8—Rogowski Assemblies (Neutral Bus
Part Numbers)
Figure 28. Neutral Bus Rogowski ASM 10108266
Breaker/Switchgear
Rogowski Assembly or
Neutral Bus Bar
Part Numbers
AKD6 400A 10108266G1
AKD6 600A 10108266G2
AKD6 800A 10108266G3
AKD6 1000A 10108266G4
AKD6 1200A 10108266G5
AKD6 1600A 10108266G6
1. Be sure that the LVS has been de-energized and the breaker in the compartment being retrofit are switched off
and removed from the LVS.
2. Open the door on the rear of the compartment to gain access the cable/bus compartment of the LVS.