PTAI216
PTAI216
PTAI216
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福建光沃自動(dòng)化設(shè)備有限公司
聯(lián)系人 ：歐工（銷售經(jīng)理）
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有趣的事實(shí)還在于，對(duì)于直流電壓來(lái)說(shuō)，電流越大，保險(xiǎn)絲的熔斷表現(xiàn)就越關(guān)鍵。普通的集成式保險(xiǎn)絲只能用在不超過(guò)4A額定的交/直流輸入環(huán)境下。若電流更大，150VDC以上的直流運(yùn)行是不允許的。輸入為230VAC時(shí)，整流后的電壓已在320VDC左右，三相應(yīng)用的變頻器中間電路電壓在360至900VDC之間，具體取決于源電壓。
該問(wèn)題已被重視。在當(dāng)前的UL安規(guī)文檔（實(shí)際應(yīng)用指導(dǎo)手冊(cè)）中已經(jīng)精確描述了能夠使用DC電壓輸入的電源的定義。其所使用的熔斷保險(xiǎn)絲必須能夠及時(shí)熔斷短路電流和過(guò)載電流，否則電源所處的環(huán)境就會(huì)產(chǎn)生危險(xiǎn)的高溫。
PULS普爾世可靠的解決方案
一臺(tái)適用于高壓直流電輸入的電源必須滿足以下兩點(diǎn)：
配備合適的輸入濾波器，能夠過(guò)濾對(duì)地的高共模電壓；
安裝的熔斷保險(xiǎn)絲必須具備UL和IEC安規(guī)認(rèn)證.
在15W到480W功率級(jí)別范圍內(nèi)，PULS普爾世可提供豐富的電源產(chǎn)品，這其中也包括經(jīng)驗(yàn)證的允許直流輸入的可靠電源產(chǎn)品。這些電源無(wú)論是在電氣間隙及爬電距離的設(shè)計(jì)方面，還是在直流操作時(shí)的輸入保險(xiǎn)絲選擇方面，均獲得了許可。
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