瞬时电磁式过电流继电器
instantaneous electromagnetic overcurrent relay
智能脱扣器电路
intelligent release circuit
油压降低脱扣器
oil pressure low trip device
油温上升脱扣器
oil temperature rise trip device
脱扣器保护功能
protection function of trip relay
漏电脱扣器的改进设计
Improved Design of Leakage Trip Mechanism