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Install AKD-10—Neutral Rogowski Current Transformer (CT)
• Ensure only qualified personnel install, operate, service, and maintain all electrical
equipment.
AKD-10—Neutral CT Assembly, Bus Compartment
The AKD-10 EntelliGuard R Circuit Breaker uses an air-core Rogowski Current sensor to measure current
level. Legacy AK and AKR breakers used iron core CTs . For the Retrofill breaker 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 or have iron core CT output modified by a neutral CT adapter See Neutral CT Adapter.
The Rogowski CT comes mounted on copper bars matching the same hole-pattern as the existing neutral
bar. Neutral CT wires from the Rogowski coil to the AKD-10 gray terminal blocks must be run as a "twisted
pair". Existing wires from the gray block to the 36 pt. secondary disconnect may remain as they are. Table 10
shows the Rogowski assembly part numbers for AKD-10 Switchgear.
AKD-10—Rogowski Assembly Part Numbers
Table 10. AKD-10—Rogowski Assemblies (Neutral Bus Part Numbers)
Switchgear/Breaker
AKD-10 400A
AKD-10 800A
AKD-10 1600A
AKD-10 2000A
EntelliGuard R Circuit Breaker Retrofill AKD-10 Installation Manual
45
Rogowski Assembly or
Neutral Bus Bar
Part Number
10108266G1
10108266G3
10108266G6
10108266G7
• Turn off all power to switchgear. Tagout
and lockout main source, up-stream or
main breaker.
• Failure to comply with these instructions
will result in death or serious injury from
severe burns caused by arc flashing that
has exceedingly high temperatures.
•
Always wear personal protection
equipment according to OSHA standards
and appropriate to the severity of
potential burns.
Figure References for Assembly Drawings
Figure 25. Neutral Bus Rogowski ASM 10108266
Figure 25. Neutral Bus Rogowski ASM 10108266
Figure 25. Neutral Bus Rogowski ASM 10108266
Figure 25. Neutral Bus Rogowski ASM 10108266
DEH41550 R06
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