watt meter meaning in English

电表
电力计
瓦特表
瓦特计/功率计

Electric performance index of the system is given . the ac standard equipment should be 3 - phase output standard resource by which the ac voltage , ac current , power factor , 3 - phase - 3 - line effective power , 3 - phase - 4 - line effective power , reactive power and single phase watt meter , working frequency and phase meter can be examined . the system makes full use of the main computer which has multi function in the examination
给出了电气性能指标，交流标准装置应为三相输出标准源、使其可校验交流电压、交流电流、功率因数、三相三线有功功率、三相四线有功功率、无功及单相电能表，同时可校验工频频率表及相位表，在校验检测中充分发挥主机多能的作用。