Circuit breakers.

Medium voltage circuit breakers are designed to energize or de-energize circuits under normal conditions and special conditions, such as during short-circuits or unloaded cables

The most common types of circuit breakers include nowadays:

• Vacuum circuit breakers
• SF6 circuit breakers             

IEC 62271-100 and ANSI C.37-09 are applicable standards for circuit breakers used in medium voltage (AC) networks. The test duties stated in these standards include the following operations:

• Making and breaking of short-circuits
• Mechanical endurance
• Making and breaking of circuits with capacitive loads             

The KEMA High-Power Laboratory allows realistic testing conditions for these above mentioned test duties.

Furthermore, for obtaining a KEMA Type Test Certificate, the following tests need to be performed by the KEMA
High-voltage Laboratory:

• Dielectric tests
• Temperature-rise test
  
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