electrodynamic type power factor meter
iron vane type power factor meter
Power Factor Meter
功率因数表
功率因数测量仪
功率因数计
必v因子计
功率因子计
power factor meter group
THE NEW POWER FACTOR METER
3-phase power factor correction
Active Power Factor Correction
active power factor correction APFC
Active power factor corrector
Active power factor corrector with high frequency switch
Adjustable Power Factor
adjustment of power factor angle φ
approximate unity power factor (UPF) control
asynchronous motor with high power factor