Front Face Description

Front Face

The main controls, operation indicators, settings, and locking mechanisms are on the front of an electrically-operated circuit breaker (with motor mechanism).

A Faceplate

B Charging handle

C Keylocking in O (OFF) position (option available for ComPacT NSX400-630 only)

D Main contacts position indicator

E Spring-charged and ready-to-close indicator

F Padlocking in O (OFF) position

G Manual/automatic operating mode selector

H Sealing accessory

I Closing (I (ON)) and opening (O (OFF-T)) pushbuttons

J Trip unit

For more information about motor mechanism installation, consult the instruction sheets on the Schneider Electric website:

BQT6157604, Motor Mechanism for ComPacT NSX100-250
BQT6157605, Motor Mechanism for ComPacT NSX400-630

Main Contacts Position Indicator

Indicator	Description
	The circuit breaker is closed.
	The circuit breaker is open or tripped.

NOTE: Use the SD or SDE auxiliary contact to distinguish the Trip position from the O (OFF) position.

Spring-Charged and Ready-to-Close Indicator

Indicator	Description
	Closing spring charged
	Closing spring discharged

NOTE: The closing spring only provides the necessary energy for circuit breaker closing. The circuit breaker mechanism supplies the energy for tripping.

Manu/Auto Selector

The Manu/Auto button selects the operating mode:

In manual operating mode, all electrical commands are disabled.
In automatic operating mode, only electrical commands are executed.

NOTE: The opening (O (OFF-T)) pushbutton can be used to open the ComPacT NSX circuit breakers in automatic and in manual operating modes.