Low-Voltage Replacement Circuit Breakers

Featuring Siemens WL operator

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 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.  

The following circuit breakers are available as pre-engineered designs. Other manufacturer’s models and ratings can be engineered by Siemens by customer request.

Manufacturer

Model

Siemens

RL, SB

ABB / ITE

K Line

Westinghouse

DB, DS

GE

AK



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

Why Siemens?

  • 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 th possible arc flash energy




KLW Low-Voltage Replacement Circuit Breakers (replacements for ABB/ITE K Line)

ANSI 240/480/600 VAC at 22-85 kA, 600-4,000 amperes

Electronic Trip Units (ETUs)

  • Alphanumeric or Graphical Display

  • Power Metering

  • Protective Relaying

  • Alarm Functions

  • Event Logs

  • Zone Selective Interlocking (ZSI)

  • Dynamic Arc Sentry (DAS)

  • Communication Protocols



Analog Trip Units (ATUs)

  • Suitable for 1-E and harsh environment applications

  • Available with LT, ST, INST & LS

  • Arc Flash Reduction Mode

  • Fault Indication output contacts




KLW Low-Voltage Power Circuit Breaker Ratings at 50/60 Hz

Replacement Circuit Breaker

Continuous Current

Fuse Rating

Interrupting Current Rating

Rated Max. Volts

Applicable Rating Plug Range

240 VAC

480 VAC

600 VAC

Amperes

Amperes

kAIR RMS

VAC

Amperes

KLW-800

800

NA

42

30

22

600

250-800

KLW-1600

1600

NA

65

50

42

600

200-1600

KLW-2000

2000

NA

85

65

55

600

200-2000

KLW-3000

3000

NA

85

65

65

600

800-3000

KLW-4000

4000

NA

130

85

85

600

800-4000

KLFW-800

800

300-1000

200

200

200

600

250-800

KLFW-1600

1600

1200-2500

200

200

200

600

200-1600



Figure 1: Sample Dimension Diagram



Primary dimensions (inches) -

Matching Existing Bus

                  KLW-800

                  KLW-1600

                  KLW-2000

                     KLW-3000

                   KLW-4000

A

6.00

6.00

6.00

7.00

7.00

B

3.50

6.00

6.00

7.50

7.50

C

3.50

6.00

6.00

7.50

7.50





RLW Low-Voltage Replacement Circuit Breakers (replacements for Siemens RL)

ANSI 240/480/600 VAC at 22-200 kA, 800-5,000 amperes

Electronic Trip Units (ETUs)

  • Alphanumeric or Graphical Display

  • Power Metering

  • Protective Relaying

  • Alarm Functions

  • Event Logs

  • Zone Selective Interlocking (ZSI)

  • Dynamic Arc Sentry (DAS)

  • Communication Protocols



Analog Trip Units (ATUs)

  • Suitable for 1-E and harsh environment applications

  • Available with LT, ST, INST & Ground

  • Function Selector Switch: LSI, LI, & LS

  • Arc Flash Reduction Mode

  • Fault Indication output contacts




RLW Low-Voltage Power Circuit Breaker Ratings at 50/60 Hz

Replacement Circuit Breaker

Continuous Current

Fuse Rating

       Interrupting Current Rating

Rated Max. Volts

Applicable Rating Plug Range

240 VAC

480 VAC

600 VAC

Amperes

Amperes

kAIR RMS

VAC

Amperes

RLW-800

800

NA

22-42

22-42

22-42

600

200-800

RLW-1600

1600

NA

50-65

50-65

50-65

600

200-1600

RLW-2000

2000

NA

65-85

65-85

65-85

600

200-2000

RLW-3200

3200

NA

65-85

65-85

65-85

600

800-3200

RLW-4000

4000

NA

85-100

85-100

85-100

600

800-4000

RLW-5000

5000

NA

85

85

85

600

800-5000

RLFW-800

800

250-1600

200

200

200

600

200-800

RLFW-1600

1600

800-3000

200

200

200

600

200-1600



Sample Dimension Diagram



Primary dimensions (inches) -

Matching Existing Bus

                 RLW-800

                  RLW-1600

                  RLW-2000

                  RLW-3200

                   RLW-4000

                  RLW-5000

                  RLFW-800

                    RLFW-1600

A

6.50

6.50

6.50

7.00

7.00

7.00

6.50

6.50

B

6.00

6.00

6.00

7.00

7.50

9.50

6.00

6.00

C

6.00

6.00

6.00

7.00

7.50

9.50

6.00

6.00





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


Did this information help you?