描述
6DD1660-0BD0
供電系統(tǒng)的浪涌主要來(lái)自兩方面的原因:外部(雷電原因)和內(nèi)部(電氣設(shè)備啟停和故障等)。浪涌的特點(diǎn)往往是時(shí)間很短(雷電造成的過(guò)電壓往往在微秒級(jí),電氣設(shè)備造成的過(guò)電壓往往在毫秒級(jí)),但是瞬時(shí)的電壓和電流極大,極有可能對(duì)用電設(shè)備和電纜造成危害,所以需要浪涌保護(hù)器對(duì)它們進(jìn)行保護(hù)。
浪涌保護(hù)器,英文名SurgeProtectiveDevice,簡(jiǎn)稱SPD,是一種為各種電子設(shè)備、儀器儀表、通訊線路提供安全防護(hù)的電子裝置,主要用于限制過(guò)電壓和泄放電涌電流。浪涌保護(hù)器一般是與被保護(hù)的設(shè)備并聯(lián),當(dāng)產(chǎn)生過(guò)電壓時(shí),可以起到分流和限壓的效果。防止過(guò)大的電流與電壓對(duì)設(shè)備產(chǎn)生損害。
浪涌保護(hù)器的核心元件是內(nèi)部的一個(gè)非線性元件。根據(jù)非線性元件的不同,浪涌保護(hù)器可以分為開(kāi)關(guān)型(核心元件主要為放電間隙)和限壓型(核心元件主要為壓敏電阻)。
放電間隙和壓敏電阻的工作原理雖然有差異,但是基本的特性非常相似:在沒(méi)有過(guò)電壓時(shí),他們的阻抗都非常高,一般是兆歐級(jí),幾乎相當(dāng)于斷路。當(dāng)出現(xiàn)過(guò)電壓時(shí),阻抗迅速下降到幾歐,浪涌電流就會(huì)通過(guò)浪涌保護(hù)器流入地,而不會(huì)進(jìn)入設(shè)備,同時(shí),由于浪涌保護(hù)器的這時(shí)的阻抗很小,它的兩遍電壓也比較小,同時(shí)因?yàn)樗捅槐Wo(hù)的設(shè)備并聯(lián),也就防止設(shè)備承受較大的浪涌電壓。這樣,就起到了泄流和限壓的效果。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢(shì)價(jià)格,大量現(xiàn)貨。
主營(yíng)DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國(guó)內(nèi)實(shí)力庫(kù)存商家