电容器组允许在其1.1倍额定电压下长期运行.在运行中,由于倒闸操作,电压调整,负荷变化等因素能引起电力系统波动,产生过电压.有些电压虽然幅值较高,但时间很短,对电容器影响不大,所以电容器组允许短时间的过电压.
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