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).

Faceplate
Charging handle
Keylocking in O (OFF) position
Main contacts position indicator
Spring-charged and ready-to-close indicator
Padlocking in O (OFF) position
Manual/automatic operating mode selector
Closing (I) and opening (O) pushbuttons
Sealing accessory
Trip unit (circuit breaker only)

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

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

NOTE: The motor mechanism cannot be installed on a ComPacT NSX DC EP circuit breaker.

Main Contacts Position Indicator

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

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

Control Charge Indicator

Indicator	Description
	Stored energy control charged
	Stored energy control discharged

NOTE: Stored energy control only provides the necessary energy to close the circuit breaker. 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 DC circuit breakers in automatic and in manual operating modes.