过电流脱扣试验。
分闸操作有分闸电磁铁，过电流脱扣电磁铁及手动按钮操作三种。
Break-brake operations have three kinds of break-brake electromagnet, over-current trip and manual button.
分闸操作有分闸电磁铁，过电流脱扣电磁铁及手动按钮操作三种。
Close-brake have two kinds of close brake electromagnet and manual button.
电动机过载保护通常采用继电器，而配电线路过载保护多采用断路器的长延时过电流脱扣器来完成。
Protection against motor over - load usually adopt thermal relay, but protection against line over - load usually adopt long delay over- current release of circuit- breaker.
电动机过载保护通常采用继电器，而配电线路过载保护多采用断路器的长延时过电流脱扣器来完成。
Protection against motor over - load usually adopt thermal relay, but protection against line over - load usually adopt long delay over- current release of circuit- breaker.
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