Specifications
Cable/busbar earthing device
All ‘M-PACT’ circuit breakers can be fitted with an
earthing device. It has a short circuit fault capacity
equal to the I
cw
rating of the breaker. This permits
either the feeder cables or the busbar to be safety
held at earthed potential and locked during system
maintenance operations.
Carriage position switch
Available as an optional device for mounting within
the base of the cassette, this switch provides six
single pole changeover contacts for local or remote
electrical indication of the circuit breaker status:
Connected, Test and Disconnected
The Disconnected position is indicated only when
minimum isolating distances between contacts on
both the main and auxiliary circuits have been
achieved.
This option is in addition to the mechanical
indicators which are fitted as standard.
When installed, the carriage switch is IP2X
protected and includes wiring to a terminal block
located on the left-hand side of the cassette.
Note: The carriage position switch is an option
only suitable for withdrawable circuit breakers.
A.24
Technical overview
A
GE Power Controls
Cluster contacts
These are the main isolating contacts which are
fitted to the rear terminals on the moving portion of
the withdrawable unit.
As part of standard inspection and maintenance
procedures, cluster contacts have been designed to
be easily and quickly removed and replaced using
universal cluster pliers.
2/3 way cable / rod mechanical
interlocks
Cable interlocking version shown above
Available for fixed and withdrawable circuit breakers
these units enable the direct interlocking of
M-PACT circuit breakers, either mounted side-by-
side or stacked. The interlocking mechanisms are
connected by a specially designed cable or rod or
3 in a ‘1 from 3’ OR ‘2 from 3’ configuration, and
any mix of current ratings / pole configurations can
be accommodated.
Standard cable lengths available: 1.0, 1.6, 2.0, 2.5,
3.0, 3.5 and 4.0 metres.
(Please contact our technical customer service
department if longer length is required.)