Install Neutral Current Transformer Adapter (Nct Adapter) 150A-5000A; Install Door Interlock System (Cassette Side) - ABB AKD-5 Installation Manual

Entelliguard retrofill circuit breakers

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Install Neutral Current Transformer Adapter (NCT Adapter) 150A-5000A

This is a miniature Rogowski coil. It mounts between the incoming 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. It allows a single breaker in an existing M-T-M arrangement to be replaced and

operated with an existing 4-wire Multi-Source GF scheme. See

The Neutral CT Adapter supports iron core Neutral sensors compatible with MicroVersa Trip, MVT RMS-9,

MVT Plus & PM, Power Plus, Pro Trip and EntelliGuard TU rated from 150 to 5000 Amps as used in switchboards and

switchgear from 1979-2015. It is available in five variations (shown in Table below).

Catalog Number

RNCTA1200 (R)

RNCTA2000 (R)

RNCTA3000 (R)

RNCTA4000 (R)

RNCTA5000 (R)

Note: The RNCTA1200 is unique because the Rogowski sensors on the breaker are actually 630A & 1250A rated.

shows the components that make up the AKD-5 retrofill door interlocking assembly:

Figure 27

Figure 27. AKD-5, AKD-6—Door Interlocking Components

31 EntelliGuard R Circuit Breaker Retrofill AKD-5/6 Installation Manual

Table 8

Figures13A-F.

Supported Neutral CT ratings (A)

600, 1200

150, 200, 400, 800, 1000, 1600, 2000

3000

2500, 3200, 4000

5000

DEH0005240 R01

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Akd-6