3-7.1 Connection Diagrams - Eaton MDN-408 Instructions For Installation, Operation And Maintenance

Magnum ds series; magnum dsx series; magnum dsl series low voltage power circuit breakers

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Table Of Contents

Table of Contents

Instruction Book

Page 24

Effective: May 2006

Drawout type circuit breakers: Compatible secondary

plug-in connectors are mounted on the top front portion

of the drawout cassette (Figure 3-24). These connec-

tors match and plug into the circuit breaker mounted

connectors. Contact points are wired from the cas-

sette's plug-in connectors to cassette mounted terminal

blocks. The terminal blocks are also mounted on the

top front portion of the cassette. The secondary termi-

nals have finger-proof hinged covers with small holes for

probe testing.

Fixed type circuit breakers: There are two secondary

connection options:

(1) Without Terminal Block

(2) With Terminal Block

1. Without Terminal Block - If a terminal block for

customer use is not required, the circuit breaker is

supplied with both plug-in connectors (male and

female) just described in the two previous para-

graphs. The plug-in connectors are joined and

attached to the top portion of the circuit breaker.

The customer can plug secondary wiring with crimp-

on connectors into back of the plug-in connectors;

subsequently the connections to the circuit breaker

can be quickly joined or separated as required.

2. With Terminal Block - For those customers pre-

ferring to wire to a terminal block, terminal blocks

with finger-proof hinged covers are added to the

secondary configuration just described for a fixed

circuit breaker "without a terminal block." The termi-

nal blocks are wired to the plug-in connectors and

also permanently attached to the upper rear portion

of the circuit breaker (Figures 3-2 and 3-4).

A standard tool is available from the plug-in connector

manufacturer (AMP) to facilitate the removal of sec-

ondary wiring from a plug-in connector, or contact

Cutler-Hammer for assistance (Figure 3-25). The con-

nector halves must be separated to use this tool.