至今几乎所有的电力变换器为在线换向式的当有功功率较小，而消耗的无功较大时，对所联接母线的电压是非常有害的。
Almost all the power converters in use up to now are line-commutated, when the level of active power is low, and reactive power consumed is high, being very harmful for the connection bus voltage.
开关的进线端和出线端是铜垫块时，铜垫块和联接板之间连接有软母线。
If the incoming and outgoing line ends are copper spacers, the soft bus connects the copper pad with the coupling panel.
开关的进线端和出线端是铜垫块时，铜垫块和联接板之间连接有软母线。
If the incoming and outgoing line ends are copper spacers, the soft bus connects the copper pad with the coupling panel.
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