GE Industrial Solutions Neutral Rogowski Current Transformer (CT) - Manual (Page 5)

4 Neutral Assemblies Manual DEH-41531 02/12
5. Disconnect the wires that are attached to the existing CT assemblies and place them in a way that they do not
interfere with the replacement of the CT assemblies.
6. Replace the neutral disconnect wiring with a new wire. This should be routed directly to the secondary discon-
nects of the cassette assembly.
7. Unfasten and remove the bolts that hold the neutral disconnects assemblies to the horizontal bus bars. Keep the
hardware in a handy location for reassembling.
8. Care should be taken while handling the CT assemblies such that they do not get damaged or damage other
components within the LVS.
9. Replace the old CT assembly with the new Rogowski assembly ( Figure 2 or Figure 3 , depending if it’s AK25 or
AK50 switchgear) on the horizontal bus bars and fasten it using the hardware previously removed. The position of
the new CT assembly should match that of legacy, noted during Step 4.
10. Connect the wires back to the Rogowski CT assembly leads. Maintain the same polarity as that of the legacy CT
connections, noted during Step 4.
11. Check for continuity from the CT leads to the secondary disconnects on the retrofit EntelliGuard ACB.
12. Always verify that the new Rogowski assembly is properly installed before activating it.
Figure 2. AKD-5—AK25 Neutral Bus Rogowski ASM 10108212