试题详情

三相四线电能表有功功率表达式():

AP=UAIAcosφA+UBIBcosφB+UCICcosφC

BP=UAIAsinφA+UBIBsinφB+UCICsinφC

CP=UAIAtgφA+UBIBtgφB+UCICtgφC

DP=UAIActgφA+UBIBctgφB+UCICctgφC