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3WL Air Circuit Breakers

Siemens · 2012

3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)

General data

Main circuit connections – connection types

Main circuit connections

All circuit breakers are equipped with horizontal main circuit

connections on the rear for up to 5000 A as standard (horizontal

connection to busbars). Exception: Circuit breakers of size II

with max. rated current 4000 A.

Circuit breaker with a maximum rated current of 6300 A and

circuit breaker of the size II with a maximum rated current of

4000 A are equipped with vertical main connections (for upright

busbars).

The following options are available, with all combinations of

top and bottom connections possible:

• Accessible from the front, single hole (for vertically installed

busbars)

• Accessible from the front, double hole (holes according to

DIN 43673) (for vertically installed busbars)

• At the rear, vertical (for vertically installed busbars)

• Connecting flange (for direct connection to guide frame up to

4000 A).

Connection options for auxiliary circuit connections

Auxiliary circuit connections

The type of connection for the auxiliary switches depends on the

installation type:

• Withdrawable version: The internal auxiliary switches are con-

nected to the male connector on the switch side. When fully in-

serted, the connector makes a connection with the sliding

contact module (see the graphic "Guide Frame" in "Design") in

the guide frame. Various adapters can then be used to com-

plete the wiring (see the graphic "Connection Options for Aux-

iliary Circuit Connections").

• Fixed mounting: In this case the auxiliary supply connectors

are engaged directly onto the circuit breaker. The connectors

are equipped with

coding pins that prevent them being mistakenly interchanged.

Operator panel

The operator panel is designed to protrude from a cutout in the

door providing access to all control elements and displays with

the control cabinet door closed.

The operator panels for all circuit breakers (fixed-mounted/with-

drawable versions, 3-/4-pole) are identical. The operator panel

ensures degree of protection IP41.

Safety and reliability

The system contains many blocking devices to protect the cir-

cuit breakers and plant against unauthorized switching and to

protect maintenance and operator personnel from danger.

Others can be retrofitted.

Other safety features include:

• Infeed from above or below, as required

• Locking of the guide frame with the circuit breaker removed,

as standard

• Locking of the withdrawable circuit breaker against move-

ment, as standard

• High degree of protection with cover IP55

• Mechanical reclosing lockout after overload or short-circuit

release as standard

• The circuit breaker is always equipped with the required

number of auxiliary supply connectors

Standard versions

3WL circuit breakers are equipped with the following features as

standard:

• Mechanical ON pushbutton and mechanical OFF pushbutton

• Manual operating mechanism with mechanical closing

• Switch position indication

• Ready-to-close indicator

• Memory status indicator

• Auxiliary switch 2 NO + 2 NC

• Rear horizontal main connectors for fixed mounting and for

withdrawable version up to 5000 A, and rear vertical main con-

nections at 6300 A and size II with 4000 A

• For 4-pole circuit breakers, the fourth pole (N) is installed on

the left and is 100 % loadable with the rated current

• Contact erosion indicator for the main contacts

• Auxiliary circuit plug-in system with SIGUT screw terminals

Delivery inclusive of all auxiliary circuit connectors to internal

features including coding device for the prevention of incor-

rect installation of auxiliary supply connectors for fixed-

mounted circuit breakers

• Mechanical "tripped" indicator for electronic release system

• Mechanical reclosing lockout after tripping operation

• Operator panel cannot be taken off with the circuit breaker in

the ON position

Additional features of the withdrawable version:

• Main contacts:

Laminated receptacles in the guide frame,

penetration blades on the withdrawable circuit breaker

• Position indicator in the operator panel of the withdrawable cir-

cuit breaker

• Captive manual crank handle for moving the withdrawable cir-

cuit breaker

• Guide frame with guide rails for easy moving of the withdraw-

able circuit breaker

• The withdrawable circuit breaker can be locked to prevent it

being pushed out of position

• The withdrawable circuit breaker cannot be moved when it is

in the ON position

• Coding of the rated current between the guide frame and the

withdrawable circuit breaker

Standards

3WL circuit breakers comply with:

• IEC 60947-2

• Climate-proof according to IEC 60068-2-30.

Versions according to UL 489 also available, see Catalog LV 16.

Additional standards: www.siemens.com/lowvoltage/support or

www.siemens.com/lowvoltage/configurators.

Horizontal

connection

Front connection with single

hole or double hole

Vertical

connection

Horizontal

connection

Front connection with single

hole or double hole

Vertical

connection

Flange

connection

N S

_ 0 0 9

6 7 b

N S

E 0 _

0 0 9

6 8 b

N S

E 0 _

0 0 9

6 9 b

N S

_ 0 0 9

7 9 a

N S

_ 0 0 9 6

7 b

N S

_ 0 0 9

7 0 b

N S

_ 0 0 9

7 1 b

N S

_ 0 0 9

7 2 b

N S

_ 0 0 9 7

3 b

Fixed-mounted circuit breakers

Withdrawable circuit breaker, withdrawable guide frame

Connection using

screw connection

system (SIGUT)

(standard)

Screwless

connection method

(tension springs)

(optional)

N S E 0 _ 0 0 9 7 5 b

N S E 0 _ 0 0 9 7 6 b

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 61 62

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