Chassis for Withdrawable ComPacT NS630b-1600 Device

The chassis is identical for withdrawable ComPacT NS630b-1600 devices with:

Chassis

Carrying grip
Arc chute cover
Terminal blocks for accessories
Terminal block identification plate
Chassis locking by padlocks
Moving part position indicator (connected, test, or disconnected)
Racking handle socket
Position release button
Racking handle storage
Racking handle
Withdraw grip
Extension rail
Top safety shutters
Bottom safety shutters

Chassis Accessories

Door interlock
Mismatch protection
Withdrawable device position contacts
Terminal blocks for optional accessories
Chassis locking by keylocks
Open-door racking interlock
Auxiliary terminal shield

Chassis Terminal Block

The following example shows a withdrawable device with toggle handle. The terminal blocks are identical for devices with direct rotary handle and extended rotary handle.

Assignment of Chassis Terminal Blocks

The following table describes the assignment of the terminal blocks for withdrawable circuit breakers and switch-disconnectors:

Optional terminal blocks are delivered on the chassis only if the associated optional accessories are installed in the device.
N/A indicates that the terminal blocks and the associated optional accessories are not compatible with the device.

Block	Marking	Description	Circuit breaker	Switch-disconnector
A	CD1-CD2	2 CD disconnected position contacts	Optional	Optional
B	Com	Terminal block for the BCM ULP communication module	Optional	N/A
	UC1	Zone selective interlocking (ZSI), rectangular sensor for earth-leakage protection, or MDGF module input	Standard with MicroLogic A/E/P trip units N/A with MicroLogic trip units without measurements	N/A
	UC2	Neutral external sensor, rectangular sensor for earth-leakage protection, or MDGF module input		N/A
	UC3	External 24 Vdc power supply and external voltage		N/A
	CAF1-CAF2	Early-make contact (rotary handle)	Optional	Optional
	SDE	SDE fault-trip indication contact	Optional	N/A
	MN/MX	MN undervoltage release or MX opening voltage release	Optional	Optional
	MT1	Electrical closing order	N/A	N/A
	MT2	Electrical opening order	N/A	N/A
	SD	Trip indication contact	Optional	Optional
	CAO1–CAO2	Early-break contact (rotary handle)	Optional	Optional
	OF1-OF3	3 OF indication contacts	Optional	Optional
C	CE1–CE3	3 CE connected position contacts	Optional	Optional
C	CT1	1 CT test position contact	Optional	Optional