A-B 1756-L61S

 

A-B 1756-L61S

 

3、根據(jù)安裝環(huán)境選取變頻器的防護(hù)結(jié)構(gòu)

選擇變頻器時(shí)應(yīng)考慮其安裝環(huán)境，其中包括環(huán)境溫度、濕度、粉塵含量、腐蝕性氣體等因素，這與變頻器能否長(zhǎng)期、可靠運(yùn)行關(guān)系重大。若無(wú)法滿(mǎn)足其運(yùn)行條件，需采用相應(yīng)的防護(hù)措施。

變頻器廠家大多會(huì)提供以下幾種常見(jiàn)的防護(hù)結(jié)構(gòu)供用戶(hù)選擇。

（1）開(kāi)放型IP00，它從正面保護(hù)人體不能觸摸到變頻器內(nèi)部的帶電部分，適用于安裝在電控柜內(nèi)或電氣室內(nèi)的屏、盤(pán)、架上，尤其是多臺(tái)變頻器集中使用較好，但它對(duì)安裝環(huán)境要求較高。

（2）封閉型IP20、IP21，這種防護(hù)結(jié)構(gòu)的變頻器四周都有外罩，可在建筑物內(nèi)的墻上壁掛式安裝，可有少量的粉塵或少許溫度、濕度的場(chǎng)合，它適用于大多數(shù)的室內(nèi)安裝環(huán)境。

（3）密封型IP40、IP42，它適用于工業(yè)現(xiàn)場(chǎng)環(huán)境條件較差的場(chǎng)合。

（4）密閉型IP54、IP55，它具有防塵、防水的防護(hù)結(jié)構(gòu)，適用于工業(yè)現(xiàn)場(chǎng)環(huán)境條件差，有水淋、粉塵及一定腐蝕性氣體的場(chǎng)合。

工程現(xiàn)場(chǎng)選用變頻調(diào)速系統(tǒng)，應(yīng)根據(jù)自己的實(shí)際工藝要求和運(yùn)用場(chǎng)合選擇，應(yīng)權(quán)衡利弊，合理選用，綜合考量。只有正確、靈活地用好變頻器，交流變頻調(diào)速系統(tǒng)才能安全、可靠地運(yùn)行。

 

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