皮爾茲繼電器德國(guó)
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皮爾茲繼電器德國(guó)
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PILZ安全繼電器是控制端為直流或方脈沖波輸入，輸出端為交流隨機(jī)型，特點(diǎn)是隨著控制端直流或方脈沖波的輸入，受控制端無論在任何相位上都即時(shí)導(dǎo)通。適合于要求導(dǎo)通時(shí)間短、開關(guān)速度快的控制系統(tǒng)中。當(dāng)過零型固態(tài)繼電器用于如變壓器這類感性負(fù)載時(shí)，會(huì)引起很大的浪涌電流，使用隨機(jī)開啟固態(tài)繼電器是解決的方法之一。它可以在*個(gè)半周內(nèi)的任意時(shí)刻使輸出器件導(dǎo)通，這種開啟方式，顯著減少了惡劣條件下的開啟機(jī)會(huì)，提高了固態(tài)繼電器的使用壽命。尤其對(duì)三相電機(jī)等三相負(fù)載，為使執(zhí)行控制的多個(gè)固態(tài)繼電器同時(shí)接通，采用隨機(jī)型交流固態(tài)繼電器更為合適。
安全繼電器是由數(shù)個(gè)繼電器與電路組合而成，為的是要能互補(bǔ)彼此的異常缺陷，達(dá)到正確且低誤動(dòng)作的繼電器完整功能，使其失誤和失效值愈低，安全因素則愈高，因此需設(shè)計(jì)出多種安全繼電器以保護(hù)不同等級(jí)機(jī)械，主要目標(biāo)在保護(hù)暴露于不同等級(jí)之危險(xiǎn)性的機(jī)械操作人員。