Specifications

COMPACT

NS circuit breaker

COMPACT

NSF250N circuit breaker

on a drawout chassis

Drawout mounting

The chassis is made up of two side plates installed on the base and two other plates

mounted on the circuit breaker.

Chassis functions

All functions of the plug-in base, plus:

■ Disconnected position: the power circuits are disconnected, the circuit breaker is

simply "withdrawn" and may still be operated (on, off, push-to-trip);

■ Circuit breaker may be locked using 1 to 3 padlocks (diameter 0.19

to 0.31

inch

(5 to 8 mm), to prevent connection;

■ The auxiliaries can be tested (with manual auxiliary connector).

Mounting

■ On a backplate, through a front panel or on rails;

■ Horizontally or vertically.

Accessories

■ Auxiliary switches for installation on the fixed part of the chassis, indicating the

"connected" and "disconnected" positions;

■ Toggle collar for circuit breakers with toggle through front panel, intended to

maintain the degree of protection whatever the position of the circuit breaker

(supplied with a toggle extension);

■ Keylock which, depending on the bolt fitted, can be used to:

❑ prevent insertion for connection;

❑ lock the circuit breaker in connected or disconnected position;

■ Telescopic shaft for extended rotary handles.

Connection of auxiliaries:

■ Control voltage is provided through automatic secondary disconnects in the

connected position only. See page 20 for more details.

■ Electrical accessories can be tested in the disconnected position with an external

wiring harness.

The drawout-mounted chassis is Listed under UL file E113555 and Certified under

CSA file LR 69561.

Connected

Removed

86025

E21282

Disconnected

Installation and connections

COMPACT

NS circuit breaker: functions and characteristics