Engineering Design


Miniature Circuit Breaker Applications

Miniature circuit breakers despite being common in domestic use are not created equal. There are several types of MCBs with different tripping characteristics, each of which are designed for particular application. Table below loist the…



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Voltage Levels – IEC 61000-3-6

The following table provides the different voltage levels as per IEC. It is good to note that [1] is the only IEC standard that mentions about Medium voltage. All other IEC standards consider voltages above…



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IEC Motor Protection Coordination

IEC 60947-4-1 addresses coordination between the motor circuit protective devices and the motor starters. It also provides a method to measure performance of these devices if a short-circuit occurs. This standard defines two levels of…


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