Specifications

18
COMPACT
®
NS circuit breaker
COMPACT
®
NS circuit breaker: functions and characteristics
Installation and connections
Fixed mounting
The plug-in configuration makes it possible to:
■ Extract and/or rapidly replace the circuit breaker without having to touch
connections;
■ Allow for addition of future circuits at a later date.
When the circuit breaker is in the connected position, the primary voltage is fed
through the circuit breaker by means of multiple finger disconnects. Control voltage
of internal accessories is provided through secondary disconnects.
Parts of a plug-in configuration
■ COMPACT
®
circuit breaker (fixed mounted);
■ Set of power and secondary disconnects that are added to the circuit breaker;
■ Plug-in base for mounting through a front panel or on rails;
■ Safety trip, to be installed on the circuit breaker, that causes automatic tripping if
the circuit breaker is ON before engaging or withdrawing it. The safety trip does not
prevent circuit breaker operation, even when the circuit breaker is disconnected;
■ Mandatory short terminal shields.
The plug-in mounting is Listed under UL file E113555 and Certified under CSA file
LR 69561.
Rear connection
Connections
See pages 20 and 21 for details. COMPACT
®
NSF and NSJ circuit breakers are
suitable for reverse feeding.
push
to
trip
push
to
trip
Front connection
Plug-in-mounting
COMPACT
®
NSF250N circuit
breaker on a plug-in mounting
Mounting through
a front panel
Mounting on rails
E28025 E28026
E21018
E28027
86030
Mounting on rails
Mounting on backplate
push
to
trip
E28023
E28024
Flush mounting
E36968
push
to
trip
Refer to circuit breaker installation instructions before
installing circuit breaker, accessories or wiring.
push
to
trip