1、注意振動盤電壓大小要求：

國家標準規定，并聯電容器(qi)工(gong)頻長時刻過電壓(ya)值zui多不超越(yue)1.1倍額(e)定電壓(ya)。關于大中型異(yi)步(bu)變頻振動盤考慮到(dao)確保必(bi)定的補償效果，而又會出現較(jiao)高(gao)過電壓(ya)，這(zhe)時可選(xuan)用(yong)壓(ya)敏器(qi)件限(xian)制過電壓(ya)。

2、注意振動盤維(wei)持(chi)電壓時刻要(yao)求：

關(guan)于(yu)需主動(dong)(dong)(dong)投(tou)切的變(bian)頻(pin)振動(dong)(dong)(dong)盤(pan)(pan)，或(huo)可(ke)逆運轉(zhuan)的變(bian)頻(pin)振動(dong)(dong)(dong)盤(pan)(pan)，從正轉(zhuan)狀態到(dao)反轉(zhuan)狀態的過(guo)渡時(shi)(shi)刻(ke)(ke)內，電(dian)(dian)(dian)容器的端電(dian)(dian)(dian)壓(ya)(ya)必須降(jiang)到(dao)額定(ding)峰值(zhi)(初始值(zhi))電(dian)(dian)(dian)壓(ya)(ya)的10%以(yi)下，不然(ran)由(you)于(yu)自勵磁(ci)的添加，變(bian)頻(pin)振動(dong)(dong)(dong)盤(pan)(pan)的端電(dian)(dian)(dian)壓(ya)(ya)將升高(gao)到(dao)不能(neng)允許的程度。當(dang)選用主動(dong)(dong)(dong)投(tou)切時(shi)(shi)，投(tou)、切時(shi)(shi)刻(ke)(ke)間隔的時(shi)(shi)限(xian)應大于(yu)或(huo)等于(yu)電(dian)(dian)(dian)容器放電(dian)(dian)(dian)時(shi)(shi)刻(ke)(ke)。

3、注意振動盤避免發作自勵磁和諧振：

為避免被補償變(bian)頻(pin)(pin)振動盤發作(zuo)自勵(li)磁的(de)(de)情況(kuang)發作(zuo)，就地補償的(de)(de)電(dian)容(rong)器容(rong)量(liang)選用應盡量(liang)不過補。由于變(bian)頻(pin)(pin)振動盤堵截電(dian)源后，其轉速不能當即降為零(ling)，電(dian)容(rong)器對變(bian)頻(pin)(pin)振動盤繞(rao)組放電(dian)，使變(bian)頻(pin)(pin)電(dian)機(ji)得(de)到勵(li)磁，有可能造成短(duan)時過電(dian)壓。