...过电流保护电器 第1部分：短路定额的应用 英文名称: Low-voltage switchgear and controlgear - Overcurrent protective devices - Part 1: Application of short-circuit ratings 中标分类: K30 低压电器综合 行业分类: GB ..
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过电流继电器是继电保护装置的一种，当负载电流超过整定值时，继电器动作。
An "Overcurrent relay" is a type of protective relay which operates when the load current exceeds a preset value.
电磁式过电流继电器调整困难、度低、靠性差、能有效的对机电设备进行保护。
Electromagnetic overcurrent relays which are difficult to be adjusted and have low accuracy and reliability can not effectively protect electromechanical equipments.
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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