a three-phase alternating current parameters instrument to be used in industry is designed. it can measure the voltages, currents, power factors of each phase of three-phase alternating current.
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;
the modified types will not be equipped with commutation transformer and the three-phase alternating current power supply directly acquires dc voltage through bridge type rectifier.