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中文名称
英文名称
 - 过电流 Over current
 - 过(欠)电压 Over (under) voltage
 - 操作小母线 Operating miniature bus
 - 过流保护回路 Over-current protective circuit
 - 出线盒 Outlet box
 - 油变阻器 Oil immersed rheostat
 - 过电流继电器 Over-current relay
 - 过电压继电器 Over-voltage relay
 - 工作电源分合闸 On and off of working electric source
 - 开或闭超扭矩保护 Over-torque protection during opening and closing valve
 - 欧姆表 Ohmmeter
 - 过载电流表 Overload ammeter
 - 氧化膜避雷器 Oxide film arrester
 - 油浸自冷感应调压器 Oil-immersed self-cooled induction voltage regulator
 - 耐油橡胶管 Oil-proof rubber tubes
 

