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单选题 在电力系统正常状况下,对供电企业供到客户受电端的供电电压允许偏差:220V单相供电的,为额定值的( ). Under the normal condition of the power system, the allowable deviation of the power supply voltage supplied by the power supply enterprise to the customer's receiving terminal is ( ) of the rated value if the power supply is 220V single-phase

A. -7%、+10%

B. +7%、-10%

C. +7%、-7%

D. +10%、-10%

电能计量(第5期)(装表接电)Electric energy metering课程封面

学科:电能计量(第5期)(装表接电)Electric energy metering

时间:2023-05-25 06:14:32

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