Fixed Circuit Breaker

@experts: Topic shared between DOCA0284 and DOCA0285, with profiling; indicate if comments do not apply to both guides

Fixed Circuit Breaker Description

The following image shows the standard version of the fixed circuit breaker (no optional accessories).

A Mounting side plate

B Carrying grip

C Arc chute

D Blue fault-trip reset button

E Product identification label, with manufacturing date

F Opening pushbutton

G Closing pushbutton

H Spring charging handle

I Terminal blocks for standard accessories

J Front cover

K VBP pushbutton locking cover (optional)

L Rating plate

M Spring charged and ready-to-close indicator

N Main-contact position indicator

O Window to read the (optional) CDM mechanical operation counter

P Control unit

Q Control unit transparent cover

Fixed Circuit Breaker Accessories Description

The following image shows the accessories available for the fixed circuit breaker.

A Additional support brackets for mounting on a backplate

B ULP port module

CTerminal blocks for optional accessories

D Terminal blocks for optional accessories

E Four OF indication contacts (optional)

F Four OF indication contacts (delivered as standard)

G KMT grounding kit

H MCH gear motor

I CDM mechanical operation counter

Z1, Z2 See following images

The following images zoom in on the accessories for the fixed circuit breaker:

J Standard SDE1 fault-trip indication contact

K Optional SDE2 fault-trip indication contact or RES electrical remote reset

L Microswitch

M BCIM module

N MN undervoltage release or MX2 opening voltage release

O MX1 opening voltage release

P PF ready-to-close contact

Q XF closing voltage release

R VCPO OFF-position locking by padlocks

S VSPO OFF-position locking by keylocks

Fixed Circuit Breaker Terminal Block Description

Terminal block supplied as standard on the circuit breaker

Terminal block for optional accessories on the circuit breaker

Assignment of Terminal Blocks

DANGER
HAZARD OF ELECTROCUTION FOR VOLTAGES ABOVE 480 VAC If a voltage greater than 480 Vac is connected to a terminal, it is forbidden to connect adjacent terminals to a 24 Vdc SELV (Safety Extra Low Voltage) power supply in order to observe the insulation distances. For example, if you connect a 690 Vac supply to the UC4 terminal block, you must not connect a 24 Vdc SELV supply to the SDE2 terminal block. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF ELECTROCUTION FOR VOLTAGES ABOVE 480 VAC

If a voltage greater than 480 Vac is connected to a terminal, it is forbidden to connect adjacent terminals to a 24 Vdc SELV (Safety Extra Low Voltage) power supply in order to observe the insulation distances. For example, if you connect a 690 Vac supply to the UC4 terminal block, you must not connect a 24 Vdc SELV supply to the SDE2 terminal block.

Failure to follow these instructions will result in death or serious injury.

The following table describes the assignment and the availability of the terminal blocks for fixed circuit breakers:

Standard terminal blocks and the associated accessories are delivered with the circuit breaker.
Optional terminal blocks are delivered with the circuit breaker only if the associated optional accessories are installed in the circuit breaker.

Block	Marking	Description	Availability
A	COM	MicroLogic Active without BCIM module: Terminal block for the external power supply of the MicroLogic Active control unit	Standard
	COM	MicroLogic Active with BCIM module: Terminal block for the connection of the BCIM module to ULP modules, by using the circuit breaker ULP cord or ULP port module for the connection of the BCIM module to ULP modules, by using a ULP cord	Optional
	UC1	Zone selective interlocking (ZSI)	Standard
	UC2	Neutral external sensor	Standard
	SDE2/RES	SDE2: additional fault-trip indication contact or RES: electrical remote reset	Optional
	UC4	External phase voltage	Optional
	UC3	MicroLogic Active without BCIM module: External neutral voltage MicroLogic Active with BCIM module: External neutral voltage and external power supply of the MicroLogic Active control unit	Standard on 3P circuit breakers Optional on 4P circuit breakers
	M2C/ESM	M2C or ESM: not applicable	Optional
	SDE1	Fault-trip indication contact	Standard
B	MN/MX2	MN undervoltage release or MX2 opening voltage release	Standard
	MX1	MX1 opening voltage release	Optional
	XF	XF closing voltage release	Optional
	PF	PF ready-to-close contact	Optional
	MCH	MCH gear motor	Optional
C	OF21–OF24	4 OF indication contacts	Optional
	OF11–OF14	4 OF indication contacts	Optional
	OF1–OF4	4 OF indication contacts	Standard