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行動(dòng)計(jì)劃》指出,,當(dāng)前,,我國經(jīng)濟(jì)已由高速增長階段轉(zhuǎn)向高發(fā)展階段。在近十年的機(jī)電產(chǎn)品再制造試點(diǎn)示范,、產(chǎn)品認(rèn)定,、技術(shù)推廣、建設(shè)等工作基礎(chǔ)上,,亟待進(jìn)一步聚焦具有重要戰(zhàn)略作用和巨大經(jīng)濟(jì)帶動(dòng)潛力的關(guān)鍵裝備,,開展以高技術(shù)含量、高可靠性要求,、高附加值為核心特性的智能再制造,,推動(dòng)深度自動(dòng)化無損拆解、柔性智能成形加工,、智能無損檢測(cè)評(píng)估等智能再制造共性技術(shù)和專用裝備研發(fā)應(yīng)用與產(chǎn)業(yè)化推廣,。推進(jìn)智能再制造,有利于帶動(dòng)綠色制造技術(shù)不斷突破,,有利于重大裝備運(yùn)行保障能力,,有利于推動(dòng)實(shí)現(xiàn)綠色增長?!缎袆?dòng)計(jì)劃》提出,,到2020年,突破一批制約我國智能再制造發(fā)展的拆解,、檢測(cè),、成形加工等關(guān)鍵共性技術(shù),智能檢測(cè),、成形加工技術(shù)達(dá)到先進(jìn)水平,;發(fā)布50項(xiàng)智能再制造、技術(shù),、裝備及評(píng)價(jià)等,;初步建立可推廣的再制造產(chǎn)品應(yīng)用市場化機(jī)制;推動(dòng)建立100家智能再制造示范企業(yè),、技術(shù)研發(fā)中心,、服務(wù)企業(yè)、信息服務(wù)平臺(tái),、產(chǎn)業(yè)集聚區(qū)等,,帶動(dòng)我國再制造產(chǎn)業(yè)規(guī)模達(dá)到2000億元。
4.峰值耐受電流反映了斷路器承受由于短路電流產(chǎn)生電動(dòng)力的耐受性能,,它決定斷路器的導(dǎo)電部分和絕緣支撐件的機(jī)械強(qiáng)度以及觸頭的結(jié)構(gòu)形式,。
5.操作性能
(1)全開斷時(shí)間 是指斷路器接到分閘命令瞬間起到電弧熄滅為止的時(shí)間間隔,。即
(4-10-4)
式中 ——全開斷時(shí)間,s,;
——分閘時(shí)間,,s;從斷路器接到分閘命令瞬間到
所有相的觸頭都分離的時(shí)間間隔,,亦稱為斷
路器固有分閘時(shí)間,;
——燃弧時(shí)間,s,;是指某一相首先起弧瞬間到所
有相電弧全部熄滅的時(shí)間間隔,。
全開斷時(shí)間是說明斷
路器開斷過程快慢的主
要參數(shù),它直接影響故
障對(duì)設(shè)備的損壞程度,、
故障范圍,、傳輸容量和
系統(tǒng)的穩(wěn)定性,。 斷路器開斷時(shí)間示意圖
(2)合閘時(shí)間 處于分閘位置的斷路器,,從接
到合閘命令瞬間起到所有相的觸頭均接觸為止的
時(shí)間稱為合閘時(shí)間。
6.自動(dòng)重合閘性能
自動(dòng)重合閘的操作循環(huán):分— —合分— —合分,。 為斷路器開斷故障電路,,從電弧熄滅起到電路重新接通的時(shí)間,稱為無電流間隔時(shí)間,,一般為0.3s或0.5s,; 為強(qiáng)送電時(shí)間,一般為180s,。
斷路器開斷時(shí)間與無電流間隔時(shí)間之和稱為自動(dòng)重合閘時(shí)間,。
金屬短接時(shí)間系指斷路器重合閘操作后,觸頭閉合到第二次觸頭分開所需用的時(shí)間,。
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