XYCOM 162U 現(xiàn)貨
福州聚福興自動化有限公司銷售的進(jìn)口備件從國外生產(chǎn)廠家直接進(jìn)貨,
實行扁平化的銷售模式,給客戶節(jié)約了時間和成本。
我們的目標(biāo)就是國內(nèi)用戶采購國外備件遇到困難和疑難時都能找到我們。
我們能夠及時地報出優(yōu)惠的價格和迅捷的交貨期;國內(nèi)用戶采購國外備件受到代理壟斷價格時,
我們會給用戶提供一個比較的機會,并且為客戶提供=的解決方案。由于我們的訂單集中,訂貨量大,
因此我們能提供頗具競爭力的價格并能夠迅速交貨,我們長期以來致力于解決國內(nèi)用戶采購國外備件中的疑難問題,
并為廣大用戶提供電氣及工控自動化成套設(shè)備的購銷、現(xiàn)場調(diào)試等全面周到的服務(wù)。
能力用電流有效值(kA)表示。
3)斷路器額定運行短路分?jǐn)嗄芰?yīng)大于線路中大短路電流。
4)斷路器的額定短時耐受電流(0.5s、3s)應(yīng)大于線路中短時持續(xù)短路電流。
10.5 低壓斷路器
當(dāng)分?jǐn)嗄芰Σ粔?,一般的線路,可用有填料式熔斷器(RT0)來替代低壓斷路器。對于特別重要的供電線路,應(yīng)采用更大容量的低壓斷路器
10.5 低壓斷路器
(6)斷路器欠電壓脫扣器額定電壓等于線路額定電壓。
(7)直流快速斷路器需考慮過電流脫扣器的動作方向(極性)、短路電流上升率。
(8)剩余電流保護斷路器需選擇合理的剩余電流動作電流和剩余電流不動作電流。注意能否斷開短路電流,如不能斷開短路電流則需要適當(dāng)?shù)娜蹟嗥髋浜鲜褂谩?br />
(9)滅磁斷路器選擇時需考慮發(fā)電機的強勵電壓、勵磁線圈的時間常數(shù)、放電電阻及斷開強勵電流的能力。
10.1.1 斷路器的作用
高壓斷路器在正常運行時用它接通或切斷負(fù)荷電流;
在電氣設(shè)備或線路發(fā)生短路故障或嚴(yán)重過負(fù)荷時,由繼電保護裝置控制其自動迅速地切斷故障電流,切斷發(fā)生短路故障的設(shè)備或線路,以防止擴大事故范圍。
10.1.2 斷路器的功能
斷路器開斷電路時,充分利用交流電弧電流每半周過零一次自然熄弧的特點,加強去游離使電弧不再復(fù)燃。其介質(zhì)強度恢復(fù)主要由斷路器滅弧裝置和介質(zhì)特性所決定。
系統(tǒng)電壓恢復(fù)過程可能是周期性的或非同期性的。取決于被開斷電路的參數(shù)。
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XYCOM 162U
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XYCOM 162U
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XYCOM 162U





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