Jisho

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はいせんようしゃだんき 配線用遮断器
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Noun
1. molded-case circuit breaker; MCCB​Electricity, elec. eng.
Wikipedia definition
2. Earth leakage circuit breaker​An Earth Leakage Circuit Breaker (ELCB) is a safety device used in electrical installations with high earth impedance to prevent shock. It detects small stray voltages on the metal enclosures of electrical equipment, and interrupts the circuit if a dangerous voltage is detected. Once widely used, more recent installations instead use residual current circuit breakers which instead detect leakage current directly.
Read “Earth leakage circuit breaker” on English Wikipedia
Read “配線用遮断器” on Japanese Wikipedia
Read “Earth leakage circuit breaker” on DBpedia

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