3-842-174-350現(xiàn)貨

頻器，另外在此種情況下，變頻器的控制方式只能為v/f控制方式，并且變頻器無法實現(xiàn)電動機的過流、過載保護，此時，需在每臺電動機側(cè)加熔斷器來實現(xiàn)保護。
3、對于一些特殊的應用場合，如高環(huán)境溫度、高開關頻率、高海拔等，此時會引起變頻器的降容，變頻器需放大一擋選擇。
4、使用變頻器控制高速電動機時，由于高速電動機的電抗小，會產(chǎn)生較多的高次諧波。而這些高次諧波會使變頻器的輸出電流值增加。因此，選擇用于高速電動機的變頻器時，應比普通電動機的變頻器稍大一些。
5、變頻器用于變極電動機時，應充分注意選擇變頻器的容量，使其大額定電流在變頻器的額定輸出電流以下。另外，在運行中進行極數(shù)轉(zhuǎn)換時，應先停止電動機工作，否則，會造成電動機空轉(zhuǎn),惡劣時會造成變頻器損壞。
6、驅(qū)動防爆電動機時，變頻器沒有防爆構造，應將變頻器設置在危險場所之外。
以上內(nèi)容便是西門子變頻器應該怎樣選擇的條件以及選擇西門子變頻器應該注意的問題。提醒大家不管選擇哪款電力設備產(chǎn)品，符合自己要求的才是重要。

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3-842-174-350

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3-842-174-350