定向: directional; orient; orienta ...功率: power; rate of work; capacit ...继电器: electric relay; relay反向功率继电器: reverse power relay感应圆盘式定向功率继电器: induction disc type directional power relay功率继电器: power relay大功率继电器: high power relay低功率继电器: minimum power relay; underpower relay过功率继电器: overpower relay逆功率继电器: reverse-power relay欠功率继电器: under-power relay反比功率继电器: inverse power relay三相大功率继电器: three-phase large power relay无功功率继电器: reactive power relay有功功率继电器: active power relay定向功率: directed power; directive power定向功率计: directional power meter电动式单相功率继电器: electrodynamic type single phase power relay电动式三相功率继电器: electrodynamic type three phase power relay; electrodynamic type three-phase power relay; electrodynamictype three-phase power relay感应式无功功率继电器: induction type reactive power relay任意相角功率继电器: arbitrary phase-angle power relay有功无功功率继电器: arbitray phase angle power relay比率继电器: quotient relay变率继电器: rate of change relay; rate-of-change relay频率继电器: frequency relay
