Repair lower voltage equipments and power transmission includes tank farm pumps, main workshop and fire fighting water pump. Regular test motor and distribution cabinet insulation.
维修低压设备和给低压设备停送电，包括罐区的泵、主车间泵和消防泵泵。定期测试电机和配电柜的绝缘。
The results show that available power and power input of water pump continuously decline with motor frequency reducing, and pump efficiency also decrease at the same time.
结果水泵有效功率和输入功率均随着电机频率的下降而不断降低，同时水泵效率也随着频率下降而降低。
The results show that available power and power input of water pump continuously decline with motor frequency reducing, and pump efficiency also decrease at the same time.
结果水泵有效功率和输入功率均随着电机频率的下降而不断降低，同时水泵效率也随着频率下降而降低。
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