GE Industrial Solutions Neutral Rogowski Current Transformer (CT) - Manual (Page 3)

2 Neutral Assemblies Manual DEH-41531 02/12
Related Publications
Publication Publication Number
Brochure DEA-532
Snapshot DEE-543
Installation Manual AKD8 DEH-41549
Installation Manual AKD6 DEH-41548
Installation Manual AKD5 DEH-41547
Accessory: Door Interlock (Door Interlock Kit) DEH-41529
Accessory Retrofill Doors Assembly DEH-41563
Accessory: Position Switch Plate & Position Switch
Assembly & Wiring (Position Switch Kit) DEH-41530
Accessory: Neutral Rogowski CT Disconnect
(Neutral Assemblies) DEH-41531
Accessory: Programmer Disconnects DEH-41532
Accessory: Finger Clusters (Cluster Assemblies) DEH-41533
Accessory: Secondary Disconnects DEH-41534
FAQ DEQ-171
Application Guide DET-753
Guideform Spec DET-754
Spare/Renewal Parts Guide DET-755
Estimated Time to Complete Tasks
It takes about 20 minutes to install or replace the assembly.
General Description
When a legacy AK breaker is replaced with a retrofitted EntelliGuard ACB, the incoming wires from the neutral
CT’s need to be routed to the cassette secondary disconnects directly.
AKD-5—Neutral Disconnect Assembly (Breaker—N/A)
When a legacy AK breaker is replaced with a retrofitted EntelliGuard ACB, the incoming wires from the neutral
CT’s need to be routed to the cassette secondary disconnects directly.
AKD-5—Replace Iron Core Neutral CT with a Rogowski (Compartment)
The AKD-5 EntelliGuard R Circuit Breaker uses an open-core Rogowski current sensor to measure current level
vs. an iron-core style ( Figure 1 ) 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.
The current transformer comes with the CT-mounted on copper bars matching the same hole-pattern as the existing
neutral bar. The existing wires can be reused. Note, if existing wires need to be replaced, then a continuous wire runs
from the CT to the neutral disconnect in the cubicle.