電(dian)伴熱系統電(dian)源設計(ji)的要求(qiu)
電(dian)(dian)(dian)源設計是電(dian)(dian)(dian)伴(ban)熱工程(cheng)同樣需要(yao)(yao)考(kao)慮(lv)的(de)(de)問題，主(zhu)要(yao)(yao)考(kao)慮(lv)的(de)(de)有供電(dian)(dian)(dian)電(dian)(dian)(dian)纜，配電(dian)(dian)(dian)箱等。所有單(dan)根電(dian)(dian)(dian)伴(ban)熱都(dou)需要(yao)(yao)安裝斷(duan)路(lu)(lu)器(qi)(qi)。一般分(fen)路(lu)(lu)斷(duan)路(lu)(lu)器(qi)(qi)有30MA的(de)(de)漏電(dian)(dian)(dian)保護，如果采用自限溫電(dian)(dian)(dian)熱帶需考(kao)慮(lv)啟動電(dian)(dian)(dian)流(liu)，保證不超過70%的(de)(de)CB（電(dian)(dian)(dian)路(lu)(lu)斷(duan)路(lu)(lu)器(qi)(qi)）額(e)定功率。電(dian)(dian)(dian)伴(ban)熱供電(dian)(dian)(dian)電(dian)(dian)(dian)源需要(yao)(yao)設立(li)(li)獨立(li)(li)的(de)(de)供電(dian)(dian)(dian)系統，例如：配電(dian)(dian)(dian)箱。主(zhu)要(yao)(yao)包(bao)括有：一套主(zhu)絕(jue)緣體(ti)、動力配電(dian)(dian)(dian)盤、開關(guan)、繼(ji)電(dian)(dian)(dian)器(qi)(qi)、溫控(kong)器(qi)(qi)、控(kong)制開關(guan)、指示燈(deng)、終端(duan)接(jie)線盒、接(jie)地總線以及所有動力和(he)控(kong)制線路(lu)(lu)，對于(yu)維修(xiu)和(he)試(shi)驗用的(de)(de)單(dan)獨加熱電(dian)(dian)(dian)路(lu)(lu)，應提供控(kong)制開關(guan)。具體(ti)要(yao)(yao)求如下(xia)：
1、所有(you)電路(lu)(lu)斷路(lu)(lu)器(qi)(qi)應安(an)裝人工復位器(qi)(qi)、常態(tai)關閉(bi)、備用(yong)觸點(dian)只有(you)在(zai)電路(lu)(lu)斷路(lu)(lu)器(qi)(qi)斷開時才打開。
2. 用于工藝管線要(yao)求保(bao)(bao)持溫度控(kong)制及(ji)電(dian)路(lu)(lu)防凍(dong)保(bao)(bao)護的電(dian)路(lu)(lu)應(ying)安裝(zhuang)在(zai)同一個(ge)配電(dian)盤的兩(liang)部分(fen)。防凍(dong)保(bao)(bao)護電(dian)路(lu)(lu)應(ying)由在(zai)每個(ge)配電(dian)盤上(shang)單獨的控(kong)制器進行控(kong)制。
3. 所有電(dian)路斷路器的啟動(dong)和超溫報(bao)警(jing)引起(qi)的連(lian)接(jie)均用線(xian)連(lian)接(jie)起(qi)來，以提供(gong)兩種獨立的遙控報(bao)警(jing)功能。（失(shi)效和溫度控制）報(bao)警(jing)連(lian)接(jie)應用線(xian)連(lian)接(jie)到(dao)一個共同的終端裝置，并提供(gong)外部報(bao)警(jing)的連(lian)接(jie)頭。
4 終(zhong)端接線(xian)盒為(wei)終(zhong)端電源，控(kong)制及儀表電線(xian)進入每個控(kong)制配(pei)電盤(pan)。終(zhong)端接線(xian)盒應安裝導(dao)軌，帶管狀的旋(xuan)壓板接線(xian)頭，定型(xing)標準生(sheng)產(chan)。
5. 動力配電(dian)盤應(ying)提(ti)供型號目(mu)錄，所有斷路(lu)器應(ying)單(dan)獨用(yong)銘(ming)牌(pai)(pai)進行確定以表示其電(dian)路(lu)號碼(ma)。斷路(lu)器銘(ming)牌(pai)(pai)應(ying)用(yong)背膠黏附到配電(dian)盤上，主銘(ming)牌(pai)(pai)置于每個控制盤前(qian)部，其上應(ying)表示盤號及說明(ming)。主銘(ming)牌(pai)(pai)上的銘(ming)文至(zhi)少要(yao)12mm高的字母。
6、電伴熱電路對于設備預伴熱和預保溫，如沖洗、安全噴淋器、儀表管等應通電并從防凍保護控制盤控制。7、. 當定斷路器和導線大小時采用在冷啟動時電伴熱的最大輸出功率時的電流，對于在配電盤表上連續的負載采用持續的加熱功率。
