系统着重考虑了过载电流保护和短路电流保护。
Overload current protection and short circuit current protection are considered especially in this paper.
当电机负载过载或堵转时，采用电流截止负反馈环节可保护电机和驱动器；
Motor and inverter can be protected by the current cut-off negative feedback when motor is overload or locked-rotor.
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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