In a three-phase power system, the current in each phase is equal in magnitude, but has a 120⁰ phase shift. Ideally, the currents in the three phases add up-to “zero”. This means that the neutral wire will carry no current....
A. 元/kVA B. 元/kW C. 元/(kVA·月) D. 元/(kW·月) 查看完整题目与答案 (易)正常用电情况下基本电费以(__C.月__)计算。 A. 日 B. 周 C. 月 D. 年 查看完整题目与答案 (易)暂停期满或每一个日历年内累计暂停用电时间超过(___)者,不论客户是否申请恢复用电,供电企业...
PID does not occur in grounded systems, where the inverter’s negative pole is grounded, or in systems less than or equal to 600 V. Here, eliminating the high negative voltage potential drives the PID phenomena. Thus, the potential can float between high positive or negative values in an ...