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Sole authorized source for Siemens SB Breakers and accessories.

Also offering insulated breakers for most manufacturers.

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Siemens SB

Siemens SB Encased Systems Breakers bridge the performance gap between Molded Case Circuit Breakers (MCCB) and Low Voltage Power Circuit Breakers (LVPCB). Modern computer-aided design and manufacturing tools were used to effectively blend the technologies of the MCCB and LVPCB. This combination has resulted in a family of encased systems circuit breakers that exhibit the most desirable characteristics of each of the parent technologies. Included in these characteristics are high interrupting capacities, high withstand capabilities (magnetic stress), high short-time capabilities (overcurrent heating), and high mechanical and electrical endurances, without maintenance. Applications for SB breakers include main, tie, feeder, and emergency source breakers in industrial plants, large commercial complexes, and medical and health care facilities. The circuit breakers are constructed for either fixed or drawout installation. They can be physically grouped in central distribution switchboards, or used separately in standalone applications.

The SB breaker is equipped with a two-step stored energy mechanism for closing and opening the breaker contacts. After a closing operation sufficient energy is retained in the two-step stored energy mechanism to perform the tripping function. The mechanism may be charged manually with the integrated low-force charging handle or electrically with the optional electric motor operator. Pushbuttons, switches and color-coded indicators allow for easy close and open operations.

 

PDF Circuit Breaker Manuals:

SB Encase Systems Breakers 400-2000AMP Frame Ratings

 

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