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70101109 CLASS
70101109 CLASS
70101109 CLASS
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【品牌】Allen-Bradley羅克韋爾、ABB、本特利Bently 3500系統(tǒng)卡件、GE、艾默生西屋等模塊卡件
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ARCM系列剩余電流式電氣火災(zāi)監(jiān)控探測(cè)器，是針對(duì) 0.4kV 以下的TT、TN 系統(tǒng)設(shè)計(jì)的，通過(guò)對(duì)配電回路的剩余電流、導(dǎo)線(xiàn)溫度、過(guò)電流、過(guò)電壓等火災(zāi)危險(xiǎn)參數(shù)實(shí)施監(jiān)控和管理，
從而預(yù)防電氣火災(zāi)的發(fā)生，并實(shí)現(xiàn)了對(duì)多種電力參數(shù)的實(shí)時(shí)監(jiān)測(cè),為能耗管理提供精確的數(shù)據(jù)。產(chǎn)品采用先進(jìn)的微控制器技術(shù)，集成度高，體積小巧，安裝方便，集智能化，數(shù)字化，網(wǎng)絡(luò)化于一身，是建筑電氣火災(zāi)預(yù)防監(jiān)控、系統(tǒng)絕緣老化預(yù)估等的理想選擇。產(chǎn)品符合 GB14287.2-2014《電氣火災(zāi)監(jiān)控系統(tǒng)第2部分：剩余電流式電氣火災(zāi)監(jiān)控探測(cè)器》的標(biāo)準(zhǔn)要求。
4系統(tǒng)特點(diǎn)和工作原理
鑒于本項(xiàng)目的規(guī)模，以及本項(xiàng)目電氣火災(zāi)檢測(cè)點(diǎn)位的實(shí)際情況。無(wú)論在終端剩余電流探測(cè)器還是后臺(tái)主機(jī)都是根據(jù)本項(xiàng)目的實(shí)際情況來(lái)進(jìn)行設(shè)計(jì)的。
本項(xiàng)目的系統(tǒng)特點(diǎn)可總結(jié)為一下3點(diǎn)：
1)終端探測(cè)器選用嵌入式電氣火災(zāi)探測(cè)器，方便安裝、節(jié)省成本、便于后期維護(hù)。
2)RS485總線(xiàn)連接方便，可操作性強(qiáng)。總線(xiàn)布線(xiàn)時(shí)走的是弱電橋架，不會(huì)受到強(qiáng)電的影響，確保的整個(gè)系統(tǒng)的通訊穩(wěn)定。
3)考慮到本項(xiàng)目中儀表數(shù)據(jù)量，客戶(hù)要求。本項(xiàng)目的主機(jī)選用壁掛式。壁掛式主機(jī)界面簡(jiǎn)潔，系統(tǒng)操作方便，適合本項(xiàng)目中的配電間環(huán)境和客戶(hù)的相關(guān)操作要求。
電氣火災(zāi)系統(tǒng)工作原理
1)剩余電流測(cè)量是根據(jù)基爾霍夫電流定律：在同一時(shí)刻，電路中流入和流出一個(gè)節(jié)點(diǎn)的電流矢量和為零。
以TN-S系統(tǒng)為例，將A/B/C/N同時(shí)穿過(guò)剩余電流互感器，當(dāng)系統(tǒng)未發(fā)生漏電時(shí)，流入和流出剩余電流互感器的電流矢量和為零，此時(shí)，剩余電流互感器感應(yīng)出的二次電流也為0;當(dāng)某相對(duì)大地發(fā)生漏電，此時(shí)流入和流出剩余電流互感器的電流矢量和不再為零，其大小等于從大地流走的電流即漏電流。此漏電信號(hào)通過(guò)剩余電流互感器的二次接線(xiàn)傳輸至電氣火災(zāi)探測(cè)器，經(jīng)運(yùn)算放大、A/D轉(zhuǎn)換后送入CPU，經(jīng)過(guò)一系列算法后，對(duì)變化的幅值進(jìn)行分析、判斷，并與報(bào)警設(shè)定值進(jìn)行比較，若超出定值則發(fā)出聲光報(bào)警信號(hào)并上送至后臺(tái)電氣火災(zāi)監(jiān)控設(shè)備。
SQUARE-D NEMA Size 2 STARTER Class 8536 Type SDG-1S
Square D QO115GFI Qwik Guard GFI Circuit Breaker NEW
2000 Square D Monte Carlo Kenny Wallace
Square D 30 amp. 3 Phase Breaker~Good used
Square D contactor for parts - no top - 110V Coil OK
HOT WHEELS NASCAR SQUARE D IN PACKAGE
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SQUARE D LOT OF 3 QOB2105237 10 AMP CIRCUIT BREAKERS
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Hot Wheels 1957 Chevy Square D. With Real Riders
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square d 9007c54b2 limit switch nib
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FOR SUBMERSIBLE,JET PUMPS-TEEL,GOULDS,PRESSURE TANKS
France Reims Drouet d'Erlon Square Postcard Old Vintage
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5.2ct IF 11MM Square Light Rose d'France AMETHYST NoRes
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NEW SQUARE D 50 VA TRANSFORMER NO. EO-1
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