XYCOM 3015 T現貨
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能力用電流有效值(kA)表示。
3)斷路器額定運行短路分斷能力應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)應大于線路中短時持續短路電流。
10.5 低壓斷路器
當分斷能力不夠,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的熔斷器配合使用。
(9)滅磁斷路器選擇時需考慮發電機的強勵電壓、勵磁線圈的時間常數、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荷電流;
在電氣設備或線路發生短路故障或嚴重過負荷時,由繼電保護裝置控制其自動迅速地切斷故障電流,切斷發生短路故障的設備或線路,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燃。其介質強度恢復主要由斷路器滅弧裝置和介質特性所決定。
系統電壓恢復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。
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New Ametek Sweeper Scrubber Vaccum Motor 3 Stage Fan 36VDC P/N 116513-13
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XYCOM 3015 T
APC Low Voltage RM Metered PDU 120v AP7862 New
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DS1463 Steering Drag
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XYCOM 3015 T
AccuRay AD-3-053853-00?2 Power Supply
ABB ACCURAY AD-8-066159-00?1 POWER SUPPLY ASSEMBLY ASSY MODULE 12/25V 58018
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XYCOM 3015 T