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Circuit Breaker Testing

Specialized Engineering Services, Inc.

provides comprehensive Circuit Breaker Testing services as part of our Electrical Testing and Maintenance services. We perform Circuit Breaker Testing for a variety of facilities including industrial plants, large commercial facilities, and power generation stations. We are available 24 hours a day for emergency response situations.

Circuit Breaker Testing Overview

SES services a variety of  circuit breakers including  low, medium, and high voltage breakers.  Some breakers are tested  via primary current injection (current output of 10x frame size  for instantaneous) .Others such as vacuum circuit breakers require  high potential withstand tests, vacuum bottle integrity, and or timing of breaker contacts opening and closing.  All circuit breakers are maintained per manufacturer recommendations including lubrication and inspection. Also, all circuit breakers undergo contact resistance and insulation  resistance tests.  Additional tests may include secondary  current injection  which is a test of the circuit breaker's trip unit and is not as encompassing as the primary injection current method.

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Additional Circuit Breaker Services

SES performs a variety of circuit breaker repair and life extension services. Examples of additional services include:

  • Basic repair and troubleshooting

  • Complete rebuild of circuit breaker per manufacturer or customer recommendations 

  • Trip Unit retrofit - Common replacement is AC PRO made by Utility Relay

  • Circuit breaker cubicle  or switchboard modification

  • Electrical coordination, short circuit calculations, and arc flash settings.

  • Arc Flash  Hazard mitigation 

  • Circuit breaker sales

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