DirectRack™ family of low-voltage replacement circuit breakers

Siemens WL circuit breakers are utilized for the core operator, main contacts, and accessories
Siemens WL circuit breakers are utilized for the core operator, main contacts, and accessories

Siemens' innovative design allows the primaries to connect directly to the original bus

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 solutions utilize the proven Siemens WL circuit breaker for the core operator, main contacts, and accessories, and are designed so that the primaries connect directly to the original bus.

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Manufacturer
Original model
Replacement model
Amperage (A)
Siemens/Allis-Chalmers
SBA
SBW™, SBWF™
1,200, 2,000, 3,200, 5,000
Siemens/Allis-Chalmers
SBS
SBW, SBWF
1,200, 2,000, 3,200, 5,000
Siemens/Allis-Chalmers
SBH
SBW, SBWF
1,200, 2,000, 3,200, 5,000
Siemens/Allis-Chalmers
RL
RLW™
800, 1,600, 2,000, 3,200, 4,000, 5,000
Siemens/Allis-Chalmers
RLE
RLW
800, 1,600, 2,000, 3,200, 4,000
Siemens/Allis-Chalmers
RLF
RLFW™
800, 1,600, 2,000
Siemens/Allis-Chalmers
LA
LAW™
600, 800, 1,600, 3,000, 4,000
Siemens/Allis-Chalmers
LAF
LAFW
600, 800, 1,600
General Electric
AK-15/25
AKW™
800
General Electric
AKR-30/H
AKW
800
General Electric
AK/AKR-50/H
AKW
1,600
General Electric
AKRT-50/H
AKW
2,000
General Electric
AK-75
AKW
3,200
General Electric
AK-100
AKW
4,000
General Electric
AKU-25
AKRW™
800
General Electric
AKRU-30
AKRW
800
General Electric
AKRU-50
AKRW
1,600
ITE/ABB
K Line
KLW™
800, 1,600, 2,000, 3,000, 4,000
ITE/ABB
K Don
KLFW
800,  1,600
Westinghouse
DB-15
DBW™
225
Westinghouse
DB-25
DBW
600
Westinghouse
DB-50
DBW
1,600
Westinghouse
DB-75
DBW
3,000
Westinghouse
DB-100
DBW
4,000
Westinghouse
DS-206
DSW™
800
Westinghouse
DS-206S
DSW
800
Westinghouse
DS-416
DSW
1,600
Westinghouse
DS-416S
DSW
1,600
Westinghouse
DS-420
DSW
2,000
Westinghouse
DS-632
DSW
3,200
Westinghouse
DS-840
DSW
4,000
Westinghouse
DSL-206
DSFW
800
Westinghouse
DSL-416
DSFW
1,600
Pringle/Eaton
QA
QAW™
1,200, 3,000, 4,000
Pringle/Eaton
CBC
CBWF™
1,200, 3,000, 4,000
Federal Pacific
FP
FPW™
800, 1,600
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
 
 
 
 
 
 
 
 

DirectRackTM circuit breakers eliminate the need for intermediate connections between the original bus and the new breaker. The design eliminates additional heat generation and loss of efficiencies due to increased resistance that can be caused by intermediate connections, thus removing potential points of failure and maintenance. 

Why upgrade with replacement circuit breakers?

  • Preserved investment in existing cubicles
  • Reduced downtime and minimal changeover time during upgrade
  • Increased reliability and performance
  • Improved employee safety

Why Siemens DirectRack Solution?

  • Reliability and performance with innovative design allowing the new circuit breaker to rack directly to the existing primary bus with no intermediary contacts. Intermediary contacts and associated heat generation can create points of maintenance and failure.
  • Standardized design with Siemens WL circuit breaker used for the core operator, main contacts, and modular accessories for our complete family of low-voltage replacement circuit breaker designs, reducing spare parts and training requirements.
  • Fully type-tested to IEEE std C37.59, ANSI C37.50, and ANSI/IEEE Std C37.13
  • Communication features including PROFINET IO, Modbus RTUC/TCP, or PROFIBUS
  • Trip units for all applications including ETU745, ETU776, and analog trip units.
  • 24/7 support line
  • Designs for most major brands and models

Safety related features:

  • Visible, ready-to-close indicator
  • Customizable interlocking and mechanical trip indication
  • Secondary contacts are mounted on the front for safe, easy access
  • Available Siemens Dynamic Arc Sentry (DAS) provides an arc flash mitigation mode to lower the possible arc flash energy
  • Remote breaker racking device (RBRD)

DirectRack low-voltage replacement circuit breaker solutions

Features, benefits, and installation

DirectRack low-voltage replacement circuit breakers

for most major brands and models

Replacement circuit breaker example installation

DirectRack low-voltage circuit breakers

WL air circuit breaker highlights

With over one million circuit breakers sold around the world since the product introduction, WL circuit breakers provide time-tested and proven technology in the low-voltage product portfolio. With a design created around customer needs and convenience, the WL family offers virtually unlimited configuration capabilities unique to its class, setting an industry precedent for modularity.

circuit breaker parts

What about reconditioning services? Is refurbishment right for you and your circuit breakers?

Lifecycle support

 

With reconditioning services, you can optimize the reliability and safety of your existing circuit breakers while extending their useful life. Siemens offers reconditioning solutions for most manufacturers' brands and models to restore circuit breakers to like new condition.

Click here for more information

Why reconditioning services?

Reliable switchgear is vital for facility operations, but complete replacement can require significant capital investment. Maximizing your initial switchgear and breaker expenditures with reconditioning services will:

  • Extend the life of your switchgear, eliminating the need for complete switchgear replacement
  • Improve safety
  • Increase the reliability and performanceof your breakers and your entire operation
  • Reduce operating and maintenance expenses
  • Allow for upgrades.

Why Siemens?

With a complete circuit Breaker refurbishment, each unit is stripped down to the core components and taken completely apart before cleaning, replating, repainting, and lubricating every piece to return the equipment to like new condition.

 

Siemens’ Complete Refurbishment process includes:

  • Thorough incoming inspection
  • Documentation
  • Complete disassembly, inspection,cleaning, lubricating, andrefurbishment of all components
  • Reassembly of the breaker
  • Optional upgrades including installation of state-of-the-art trip units and changing CTs
  • Mechanical and electrical operation testing performed to original manufacturer and IEEE standards.

Minimize long-term operating expenses by resolving breaker related issues before they become a problem.

  • Our Complete Refurbishment solution offers a total rebuild from the bottom up to renew the lifecycle of your breaker to ensure reliability and performance.
  • Circuit breaker trip units can be updated with modern equivalents.
  • For applications that don't require a total rebuild, our Preventative Maintenance Cleaning and Testing service is available, as well as tailored reconditioning and upgrade solutions to fit your needs.

 

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) 347-6659 or completing the "Contact us" form in the link above.

Mailing address

Siemens Industry, Inc.

7000 Siemens Road

Wendell, North Carolina 27591

United States

Request-for-quote and purchase order portal

  • Request-for-quote (RFQ) and purchase order (PO) portal

    Click on the link for Siemens' request-for-quote (RFQ) and purchase order (PO) portal for select low- and medium-voltage power distribution equipment, services, electric-vehicle charging products, and automation consulting and solutions.

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