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I-T-E JD and LD-Frame

Neutral Sensing Transformer

General

A. Turn off power feeding this device before starting the

installation.

B. Also turn off any line power within the immediate vicinity to

prevent the incidental or accidental contact of tools by

the installer.

NOTE: This instruction sheet outlines the recommended

installation procedure for the following Neutral Sensing

Transformers:

Transformer

Cat. No.

Ampere Rating Color

NO2SJD

NO3SJD

NO4SJD

NO5SLD

NO6SLD

200 Amps

300 Amps

400 Amps

500 Amps

600 Amps

Green

Caution: Incorrect usage of the neutral sensor transformer

could cause nuisance tripping or improper operation of the

ground fault function. Use only the above series of neutral

sensors.

Introduction

This neutral sensing transformer is designed to be mounted

on one 3.00" x .50" bus bar or, two 500 MCM cables,

maximum.

Mounting Procedure

A. Position the neutral sensor within easy wiring range of the

associated circuit breaker and fabricate two .312 diam-

eter holes 2.25 inches apart in bus or panel, as shown in

Figure 1. Orient L-Mounting brackets as necessary for

the mounting configuration being used and secure to the

neutral sensor with the hardware provided.

B. Mount the neutral sensor to bus or panel with 1/4-20

hardware (not provided).

NOTE: The SJD and SLD series of electronic trip circuit

breakers equipped with ground fault protection may be

used in the residual or ground return modes. When used

in the residual mode the orientation of the neutral sensing

transformer is important for proper operation. See Fig-

ures 2 and 3 for proper orientation of the neutral sensor

for residual mode ground fault. Orientation of the neutral

sensor is not required when used in the ground return

mode of ground fault. See Figure 4 for installation of

neutral sensor.

Figure 1

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 55 56

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