英语考试.ppt

英语考试英语考试组员:欧阳妮组员:欧阳妮马勇马勇刘政刘政龙岳轩龙岳轩刘建业刘建业吴有祥吴有祥梁琰梁琰英语考试内容英语考试内容??3Maintenance3Maintenance??33维护维护??????Hazardous voltage can shock burn or Hazardous voltage can shock burn or cause death. cause death. ??危险电压可以电击烧伤或引起死亡。危险电压可以电击烧伤或引起死亡。??Do not service before disconnecting Do not service before disconnecting .??在服务之前必须切断电源。在服务之前必须切断电源。??Vacuum circuit breaker may be used Vacuum circuit breaker may be used to switch high power switch high power circuits.??真空断路器,可用于高功率开关电路。真空断路器,可用于高功率开关电路。吴有祥吴有祥22??All power sources connecting to the All power sources connecting to the circuit breaker must be isolated to circuit breaker must be isolated to avoid possibility of electrical shock avoid possibility of electrical shock during inspection and inspection and servicing.??在检查和维修时所有电源连接到断路器必在检查和维修时所有电源连接到断路器必须被隔离,以避免触电的可能性须被隔离,以避免触电的可能性。。吴有祥吴有祥33??Under certain conditions dangerous Under certain conditions dangerous voltages may exist even with the voltages may exist even with the power connection connection removed.??在某些拆除连接情况下甚至可能存在危险在某些拆除连接情况下甚至可能存在危险电压与电源。电压与电源。龙岳轩龙岳轩11??To avoid injuries, always disconnect To avoid injuries, always disconnect power, discharge circuits and power, discharge circuits and disconnect external voltage sources disconnect external voltage sources before ponents.??在触摸组件之前为了避免受伤,总是断开在触摸组件之前为了避免受伤,总是断开电源、放电电路和断开外部电压源。电源、放电电路和断开外部电压源。龙岳轩龙岳轩22??All inspection and maintenance All inspection and maintenance operations carried out on the BVAC operations carried out on the BVAC circuit breaker must be performed circuit breaker must be performed with the power off, pantograph with the power off, pantograph lowered and circuit breaker and circuit breaker earthed.??所有检查和维护工作进行了所有检查和维护工作进行了BVACBVAC电路必须电路必须与电源进行开关时,受电弓降低和断路器与电源进行开关时,受电弓降低和断路器接地。接地。马勇马勇11??Do not attempt internal service Do not attempt internal service unless another personunles