Selectivity (circuit breakers)
The coordination of overcurrent protection devices in an electrical network
Selectivity, also known as circuit breaker discrimination, is the coordination of overcurrent protection devices so that a fault in the installation is cleared by the protection device located immediately upstream of the fault. The purpose of selectivity is to minimize the impact of a failure on the network.
Nº Q108573915 ★★
Uncommon · Knowledge
Selectivity (circuit breakers)
The coordination of overcurrent protection devices in an electrical network
Selectivity, also known as circuit breaker discrimination, is the coordination of overcurrent protection devices so that a fault in the installation is cleared by the protection device located immediately upstream of the fault. The purpose of selectivity is to minimize the impact of a failure on the network.
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From Wikipedia
Selectivity, also known as circuit breaker discrimination, is the coordination of overcurrent protection devices so that a fault in the installation is cleared by the protection device located immediately upstream of the fault. The purpose of selectivity is to minimize the impact of a failure on the network. Faults in an installation are, for example, overload and short circuit. There are four ways in which selectivity is achieved: Current selectivity: different breaking capacities Time selectivity: time delay before tripping of a breaker Energy based selectivity: analysis of the current waves Zone selective interlocking: communication between the breakers, forwarding a time delay instruction
Text: Wikipédia, CC BY-SA 4.0. ·
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