1、注意振動盤電壓大小要求：

國家標準規定(ding)，并聯電容器工頻長時刻(ke)過(guo)(guo)電壓值zui多不超越1.1倍(bei)額定(ding)電壓。關(guan)于大(da)中型(xing)異步變頻振動盤考(kao)慮到確保(bao)必定(ding)的補償效果，而(er)又(you)會出現較高過(guo)(guo)電壓，這時可(ke)選用壓敏器件限制過(guo)(guo)電壓。

2、注意振(zhen)動盤維持(chi)電壓時(shi)刻要求：

關于需主動(dong)投切的(de)(de)(de)(de)(de)變(bian)頻(pin)振(zhen)動(dong)盤(pan)，或可逆運轉(zhuan)(zhuan)的(de)(de)(de)(de)(de)變(bian)頻(pin)振(zhen)動(dong)盤(pan)，從正轉(zhuan)(zhuan)狀態到(dao)反轉(zhuan)(zhuan)狀態的(de)(de)(de)(de)(de)過渡(du)時(shi)(shi)(shi)刻(ke)內，電(dian)容器的(de)(de)(de)(de)(de)端電(dian)壓必須降(jiang)到(dao)額定峰值(初始(shi)值)電(dian)壓的(de)(de)(de)(de)(de)10%以下，不然(ran)由于自勵磁的(de)(de)(de)(de)(de)添(tian)加，變(bian)頻(pin)振(zhen)動(dong)盤(pan)的(de)(de)(de)(de)(de)端電(dian)壓將升高到(dao)不能允許(xu)的(de)(de)(de)(de)(de)程度。當(dang)選用主動(dong)投切時(shi)(shi)(shi)，投、切時(shi)(shi)(shi)刻(ke)間(jian)隔的(de)(de)(de)(de)(de)時(shi)(shi)(shi)限應大于或等于電(dian)容器放電(dian)時(shi)(shi)(shi)刻(ke)。

3、注(zhu)意振動(dong)盤避(bi)免發作自勵(li)磁和諧振：

為避免被補(bu)償(chang)變(bian)(bian)頻振動(dong)盤(pan)發作自(zi)勵磁的情況發作，就地補(bu)償(chang)的電(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)容(rong)(rong)(rong)量(liang)(liang)選用應盡量(liang)(liang)不(bu)過(guo)補(bu)。由于變(bian)(bian)頻振動(dong)盤(pan)堵截電(dian)(dian)源后(hou)，其轉速不(bu)能當即降為零，電(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)對(dui)變(bian)(bian)頻振動(dong)盤(pan)繞(rao)組放電(dian)(dian)，使變(bian)(bian)頻電(dian)(dian)機得到勵磁，有可(ke)能造(zao)成短時過(guo)電(dian)(dian)壓。