36- Akd-8, Neutral Ct Adapter Upto 5000A - ABB AKR30S-800A Installation And Maintenance Manual

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 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-8 gray terminal
blocks must be run as a "twisted pair".
36- AKD-8, Neutral CT Adapter upto 5000A
This is a miniature Rogowski coil. It mounts on the breaker between the breaker's Neutral
Disconnect and the breaker trip unit. It converts the signal from an iron Core Neutral sensor
to a Rogowski voltage output which is wired to the Breaker's Trip Unit Neutral input
connections.
The Neutral CT Adapter supports iron core Neutral sensors compatible with MicroVersa Trip,
MVT RMS-9, MVT Plus & PM, Power Plus, Pro Trip & Emax 2 TU rated from 250 to 5000 Amps
as used in GE switchboards and switchgear from 1979-2015. It is available in seven variations
(shown in table below).
Kit Number Supported Neutral CT ratings Supported T.U
ENCTA0250 250A Ekip
ENCTAQ800 400A ,800A Ekip
ENCTA1200 600A ,1200A Ekip
ENCTA1000 1000A Ekip
ENCTA3200 1600A ,3200A Ekip
ENCTA4000 2000A ,4000A Ekip
ENCTA5000 2500A ,5000A Ekip
Figure 82 Wiring Diagram
ABC
RON 3 icon ownite)| Rea wnie\Ne-t ee WARNING
' CORE | Neutral CT Adapter a Breaker | IMPROPER INSTALLATION
' Neutral CT | tap (tack) | give fick [Ne + Secondary { | Fire er roanecsos wil tend te
: rs | 1 GISCOMNMECT { | Ground Fault nuisance tips.
For Detail instructions on NCT Adaptor refer installation manual No 2TSA451018P0000
37- Procedures
Notice NEUTRAL CT ORIENTATION
NOTICE
e Write down the orientation of the existing Iron
core CT and the polarity of the connections. The
orientation and polarity needs to be matched
when the air core Rogowski is assembled in the
cable compartment.
72| © 2020 Emax 2 Retrofill Circuit Breakers 800-5000A 2TSA451009P0000 Rev-B