The arcing contacts in a circuit breaker are made of
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Circuit breakers are used in nearly all electrical systems, from residential homes to large electric utility facilities. They’re essential to the protection of our systems from over-currents and short circuits. There are several types of circuit breakers used, depending on what kind of voltage, or load, you’re using and the nature of your facility.
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Arc Contacts: Arcing contacts are designed to prevent the main contacts from being damaged and are made from silver alloys, cadmium, tungsten, and zinc. ... When the circuit breaker closes, the arcing contacts meet first, creating the bridge for the arc to cross.
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