ABB EntelliGuard AKD-5 Installation Manual page 44

3. Make a note of the neutral disconnect assembly orientation and the wire connections polarity.
This needs to be done to ensure that the assembly is maintained when the new CT assembly
is installed.
4. Disconnect the wires attached to the existing CT assemblies and place them in a way that they do
not interfere with the replacement of the CT assemblies.
5. Replace the neutral disconnect wiring with the new pared-wire which should be routed directly to
the secondary disconnects of the cassette assembly.
6. Unfasten and remove the bolts that hold the neutral disconnects assemblies to the horizontal bus
bars. Keep the hardware in a secure location for reassembly.
7. Care should be taken while handling the CT assemblies such that they do not fall down or damage
other components within the LVS.
8. Replace the old CT assembly with the Rogowski assembly
and Figure 57) on the horizontal bus bars; and fasten the Rogowski using the hardware previously
removed. Orientation of the new CT assembly should match that of the legacy which was
referenced in Step 3.
9. Connect the wires back to the Rogowski CT assembly leads. Maintain the same polarity as
that of the legacy CT connections which were noted during Step 3.
10. Check for continuity from the CT leads to the secondary disconnects on the retrofit
EntelliGuard ACB.
11. The new Rogowski assemblies are installed and ready for use.
Tools required: Wrenches, Wire stripper, wire cutter, continuity tester
Figure 54. AKD-5—AK25 Neutral Bus Rogowski ASM 10108212
42 EntelliGuard R Circuit Breaker Retrofill AKD-5 Installation Manual
(Figure 54 and Figure 55
Figure 55. Neutral Bus Rogowski
ASM 10108212 Photo
or Figure 56
DEH-41547