SBW Low-Voltage Replacement Circuit Breakers
(replacements for Siemens SB)

Replacement solutions for Siemens SB circuit breakers utilizing WL technology


Circuit Breaker Rating and Type

Example: Breaker Ratings

Breaker Type

Frame Size

FS3

FS2

FS1

Siemens Type

SBW-5000

SBW-2000

SBW-1200

Continuous Current (A)

5000

2000

1200

Interruption Class

L

C

S

L

C

S

H

L

RMS Interrupting Rating (kA)

240VAC

N/A

150

150

85

100

150

65

100

N/A

480VAC

N/A

100

150

65

100

150

65

100

N/A

600VAC

N/A

85

100

50

65

100

42

50

N/A

Rated Max. Volts (VAC)

600

600

600

Short Time Current (kA RMS)

85-100

85-100

25

Applicable Rating Plug Range

800-5000

200-2000

200-1200

Mechanical Make Time (ms)

35

35

35

Mechanical Break Time (ms)

34

34

34

Electric Close Make Time (ms)

50

50

50

Electric Trip Break Time (ms)

40

40

40

Electric Trip and Reclose Interval (ms)

80

80

80

Mechanical Duty Cycles (no maint.)

5000

5000-10000

7500

Electrical Duty Cycles (no maint.)

2000

4000

7500

Ambient Operating Temperature (°C)

-25-40

-25-40

-25-40


Three Design Philosophies for Siemens SBW solution:


Fixed Mount

Bus adapters are used to redirect the existing bus to match up to new primary stabs of the SBW.


Draw Out - 1200A and below

Direct replacement, with new breakers doors supplied


DrawOut - 2000A and above

Retro-fill replacement, SB cradle and circuit breaker removed and new WL cradle and circuit breaker installed. Bus adapter used to connect WL cradle with original bus


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