Magnum
1812.900A
29
How many connectors are mounted depends upon a
number of considerations, such as whether the circuit
breaker is electrically or manually operated and how
many features are required. When the front cover of the
circuit breaker is removed, the top of each plug-in
connector is exposed. A label on each connector
identifies the wiring points (Figure 3-21).
Drawout type circuit breakers: Compatible secondary
plug-in connectors are mounted on the top front portion
of the drawout cassette (Figure 3-23). These connectors
match and plug into the circuit breaker mounted
connectors. Contact points are wired from the
cassette’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
terminals 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 paragraphs. 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
preferring 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 terminal blocks
are wired to the plug-in connectors and also permanently
attached to the upper rear portion of the circuit breaker.
A standard tool is available from the plug-in connector
manufacturer (AMP) to facilitate the removal of
secondary wiring from a plug-in connector, or contact
Eaton for assistance (Figure 3-24). The connector halves
must be separated to use this tool.
Figure 3-23: Cassette Mounted Secondary Wiring
1. Closed Hinged Covers with Testing Holes
2. Terminal Blocks
3. Plug-in Connectors
Figure 3-24: AMP Secondary Wiring Removal Tool
3.7.1
Connection diagrams
The connection diagrams for all Magnum circuit
breakers using Digitrip RMStrip units are shown in
Figure 3-25 through Figure 3-30.
1
3
2
