Install Akd-5, Neutral Sensing For 4 Wire Ground Fault; Akd-5, Neutral Disconnect Assembly; Akd-5, Neutral Disconnect Assembly, Bus Compartment; Akd-5, Neutral Ct Adapter Upto 5000A - ABB Emax 2 Installation And Maintenance Manual

Install AKD-5, Neutral Sensing for 4 Wire Ground Fault

Danger
 Ensure only qualified personnel install, operate, service and maintain all electrical
equipment.

25 - AKD-5, Neutral Disconnect Assembly

Refer 2TSA451018P0000 Installation Manual for Neutral Disconnect Assembly

26 - AKD-5, Neutral Disconnect Assembly, Bus Compartment

AKD-5 Emax 2 Retrofill 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.
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-5 grey terminal
blocks must be run as a "twisted pair".

27 - AKD-5, 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
ENCTA0250
ENCTA0800
ENCTA1200
ENCTA1000
ENCTA3200
ENCTA4000
ENCTA5000
2TSA451011P0000 Rev-B

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
equipment according to OSHA standards and
appropriate to the severity of potential burns.
Supported Neutral CT ratings
250A
400A, 800A
600A, 1200A
1000A
1600A, 3200A
2000A, 4000A
2500A, 5000A
wear personal protection
Supported T.U
Ekip
Ekip
Ekip
Ekip
Ekip
Ekip
Ekip
© 2020 Emax 2 Retrofill Circuit Breakers 600A-4000A | 49