Low-voltage replacement circuit breakers

Low-voltage circuit breakers
Low-voltage circuit breakers

Featuring Siemens WL operator

240-600 V

Low-voltage replacement circuit breakers provide a cost-effective way to upgrade to current technology while increasing equipment reliability and minimizing downtime. Our low-voltage replacement circuit breakers utilize the proven Siemens WL circuit breaker for the core operator, main contacts, and accessories, and they are designed so that the primaries connect directly to the existing bus.  Our direct-rack connection eliminates the need for intermediate connections between the original bus and the new circuit breaker, therefore also eliminating potential heat and loss of efficiency due to increased resistance and removing any additional points of failure or maintenance. 

Why upgrade to replacement circuit breakers?

  • Preserved investment in cubicles

  • Reduced downtime and minimal changeover time during upgrade

  • Increased reliability and performance

  • Improved employee safety. 

  • Direct-connect to the primary contact mitigates heat generation

  • WL operator is less prone to nuisance tripping

  • Tip modules for all applications

  • Secondary contacts mounted on front for safe, easy access

  • Remote operation and monitoring for safety

  • 24/7 support line.

Safety related features:

  • Visible, ready-to-close indicator

  • Customizable interlocking and mechanical trip indication

  • Available Siemens Dynamic Arc Sentry (DAS) provides an arc flash mitigation mode to lower the possible arc flash energy

  • Siemens Sm@rt Gear package options available.

3D low-voltage replacement circuit breaker racking video
Low-voltage replacement circuit breakers webinar
Video interview with applications engineer, Brian Wahl, on low-voltage replacement circuit breakers
3D low-voltage replacement circuit breaker racking video
Low-voltage replacement circuit breakers webinar
Video interview with applications engineer, Brian Wahl, on low-voltage replacement circuit breakers
Manufacturer
Original model
Replacement model
Amperage (A)
Siemens/Allis-Chalmers
SBA
SBW
1200, 2000
Siemens/Allis-Chalmers
SBS
SBW
1200, 2000, 3200, 5000
Siemens/Allis-Chalmers
SBH
SBW
2000, 3200, 5000
Siemens/Allis-Chalmers
RL
RLW
800, 1600, 2000, 3200, 4000, 5000
Siemens/Allis-Chalmers
RLE
RLW
800, 1600, 2000, 3200, 4000
Siemens/Allis-Chalmers
RLF
RLFW
800, 1600, 2000
Siemens/Allis-Chalmers
LA
LAW
600, 800, 1600
Siemens/Allis-Chalmers
LAF
LAFW
600, 800, 1600
General Electric
AK-15/25
AKW
800
General Electric
AKR-30/H
AKW
800
General Electric
AK/AKR-50/H
AKW
1600
General Electric
AKRT-50/H
AKW
2000
General Electric
AK-75
AKW
3200
General Electric
AK-100
AKW
4000
General Electric
AKU-25
AKFW
800
General Electric
AKRU-30
AKFW
800
General Electric
AKRU-50
AKFW
1600
ITE/ABB
K Line
KLW
800, 1600, 2000, 3000, 4000
ITE/ABB
K Don
KLFW
800,  1600
Westinghouse
DB-15
DBW
225
Westinghouse
DB-25
DBW
600
Westinghouse
DB-50
DBW
1600
Westinghouse
DB-75
DBW
3000
Westinghouse
DB-100
DBW
4000
Westinghouse
DS-206
DSW
800
Westinghouse
DS-206S
DSW
800
Westinghouse
DS-416
DSW
1600
Westinghouse
DS-416S
DSW
1600
Westinghouse
DS-420
DSW
2000
Westinghouse
DS-632
DSW
3200
Westinghouse
DS-840
DSW
4000
Westinghouse
DSL-206
DSFW
800
Westinghouse
DSL-416
DSFW
1600
Features and characteristics
Analog Trip Unit
ETU745
ETU748
ETU776
Long-time overcurrent protection (L)
X
X
X
X
Short-time delayed overcurrent protection (S)
X
X
X
X
Instantaneous overcurrent protection (I)
X
X
 
X
Neutral conductor protection (N)
 
X
X
X
Ground-fault protection
O
 
X
O
Selectable neutral protection
 
X
X
X
Defeatable short-time protection
X
X
 
X
Defeatable instantaneous protection
X
X
 
X
Selectable thermal memory
 
X
X
X
Zone selective interlocking
 
X
X
X
Selectable I2t or fixed short-time delay
 
X
X
X
Adjustable instantaneous pick-up
X
X
X
X
Selectable I2t or I4t long-time delay
 
X
X
X
Dual protective setting capability
 
 
 
X
Dynamic Arc-Flash Sentry (DAS) or Arc Flash Mode
X
 
 
X
Extended Instantaneous Protection (EIP)
 
X
X
X
Parameterization by rotary switches
X
X
X
 
Parameterization by communication (absolute values)
 
 
 
X
Parameterization by menu/keypad (absolute values)
 
 
 
X
Remote parameterization of the alarm functions
 
 
 
X
Remote parameterization of the relay functions
 
 
 
X
Alphanumeric display
 
O
O
X
Graphical display
 
 
 
X
Power metering function
 
O
O
O
Communication via PROFIBUS-DP
 
O
O
O
Communication via MODBUS
 
O
O
O
Communication via Ethernet (BDA)
 
O
O
O
Communication via dry contacts
O
 
 
 
Rated for harsh environment applications
X
 
 
 
 
 
 
 
 

Literature

Contact us

  • Siemens USA "Contact us" request

    For more information, including service or parts, please contact our 24/7 Customer Support Center by calling phone: +1 (800) 333-7421 or completing the "Contact us" form in the link above.

Mailing address

Siemens Industry, Inc.

7000 Siemens Road

Wendell, North Carolina 27591

United States

Infrastructure matters: improving energy infrastructure has big impact on efficiency, savings.

  • Learn how upgrading with Siemens medium-voltage products helped Chicago by clicking here. 

Learn how Siemens helped Digital Realty reduce their typical deployment time.

  • By partnering with JDC Power Systems to develop a modular data center solution, which includes medium-voltage switchgear, Siemens helped reduce their typical deployment time from 179 to around 80 days. Read the story by clicking here.

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