The modified types will not be equipped with commutation transformer and the three-phasealternatingcurrent power supply directly acquires DC voltage through bridge type rectifier.
改进型不配整流变压器，将三相交流电源直接由桥式整流获得直流电压。
2
A three-phasealternatingcurrent parameters instrument to be used in industry is designed. It can measure the voltages, currents, power factors of each phase of three-phasealternatingcurrent.
设计开发一种工业用三相交流电参数仪，能够测得三相交流电各相的电压、电流、功率、功率因子等参数；
3
Primary electrical power is provided by two engine driven generators which supply three-phase, 115 volt 400 cycle alternatingcurrent.