配(pei)電(dian)柜與電(dian)容(rong)柜基本(ben)常識你清(qing)楚(chu)嗎？

一(yi)，常見的基本配電柜(ju)常識問題。

1，“電容(rong)補償",PT柜,帶電指示(shi)器,都(dou)有什么(me)作用?它們(men)的各自(zi)目的是(shi)什么(me)?配電柜廠(chang)家為(wei)你解答。

電(dian)容(rong)補(bu)償得作用就(jiu)是降低（reduce)無(wu)功(gong)(gong)功(gong)(gong)率(lv)(lv)(指物(wu)體在(zai)單位時間(jian)內所做的(de)功(gong)(gong)的(de)多少(shao))，提(ti)高功(gong)(gong)率(lv)(lv)(high power)因數。（在(zai)上次您(nin)的(de)問題“有功(gong)(gong)功(gong)(gong)率(lv)(lv)=視在(zai)功(gong)(gong)率(lv)(lv)"cos"中的(de)"cos"什么(me)意(yi)思?它(ta)的(de)中文叫(jiao)什么(me)? ”就(jiu)提(ti)到(dao)“有功(gong)(gong)功(gong)(gong)率(lv)(lv)”“無(wu)功(gong)(gong)功(gong)(gong)率(lv)(lv)”“視在(zai)功(gong)(gong)率(lv)(lv)”），因為我們的(de)用電(dian)設備(equipment)大(da)多數都是電(dian)感型(xing)的(de)，所以要用電(dian)容(rong)來補(bu)償。

PT柜

PT就是電(dian)壓(ya)互感器，PT柜里(li)裝有(you)PT和(he)避雷(lei)器，PT是把(ba)母線上的高電(dian)壓(ya)轉換成100V的電(dian)壓(ya)，測(ce)量(liang)元件（用來測(ce)量(liang)母線的電(dian)壓(ya)和(he)作(zuo)為各個支路的功(gong)(gong)率(指物體在(zai)單位時間內所做的功(gong)(gong)的多少)表、電(dian)能表等的電(dian)壓(ya)輸入(ru)(ru)量(liang)）和(he)繼電(dian)保(bao)護元件（電(dian)壓(ya)型保(bao)護和(he)帶方向保(bao)護）的輸入(ru)(ru)量(liang)。 帶電(dian)指示(shi)器

帶電(dian)指示器(qi)(qi)是用來視設備(equipment)是否帶電(dian)的(de)電(dian)器(qi)(qi)元件，它的(de)作用和試電(dian)筆相似。

2，為什么補償(chang)電容器組禁(jin)止(zhi)帶電荷(he)(electric charge)合閘（zhá)?

在交流電(dian)(dian)(dian)(dian)路中，如果電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)帶有電(dian)(dian)(dian)(dian)荷(he)(electric charge)時再次(ci)(ci)合(he)(he)閘(zha)(zha)（zhá)，則可(ke)能（maybe)使電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)承受兩倍以(yi)上額(e)定(ding)電(dian)(dian)(dian)(dian)壓的(de)峰值(peak)，這對電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)是有害的(de)。同時，也會(hui)造(zao)成很大的(de)沖擊電(dian)(dian)(dian)(dian)，有時使熔絲熔斷或斷路器(qi)(qi)(qi)(circuit-breaker)跳閘(zha)(zha)。因此，電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)組每(mei)次(ci)(ci)拉閘(zha)(zha)之后，必須(xu)隨即(ji)進行放(fang)電(dian)(dian)(dian)(dian)，待電(dian)(dian)(dian)(dian)荷(he)消失后再行合(he)(he)閘(zha)(zha)。從理論上講，電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)的(de)放(fang)電(dian)(dian)(dian)(dian)要(yao)(yao)無窮大時才能放(fang)完，但實際上只要(yao)(yao)放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)阻(zu)選得(de)合(he)(he)適，那么1rain左右即(ji)可(ke)滿足要(yao)(yao)求。所以(yi)運行規程中規定(ding)：電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)組每(mei)次(ci)(ci)重新合(he)(he)閘(zha)(zha)，必須(xu)在電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)組斷開3min后進行，以(yi)利(li)安(an)全(quan)。

電(dian)容(rong)柜(ju)工(gong)作原理(principle)：

用(yong)電(dian)(dian)(dian)(dian)(dian)設備(equipment)除電(dian)(dian)(dian)(dian)(dian)阻性負(fu)(fu)(fu)載外，大部分用(yong)電(dian)(dian)(dian)(dian)(dian)設備(equipment)均屬(shu)感性用(yong)電(dian)(dian)(dian)(dian)(dian)負(fu)(fu)(fu)載（如(ru)日光燈、變(bian)壓(ya)（氣(qi)壓(ya)變(bian)量(liang)(liang))器、馬達(motor)等(deng)用(yong)電(dian)(dian)(dian)(dian)(dian)設備(equipment)）這些感應負(fu)(fu)(fu)載，使供電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)壓(ya)相位發生改變(bian)（即電(dian)(dian)(dian)(dian)(dian)流(liu)(Electron flow)滯后于電(dian)(dian)(dian)(dian)(dian)壓(ya)），因此(ci)電(dian)(dian)(dian)(dian)(dian)壓(ya)波動大，無功功率(lv)(指物(wu)體在單(dan)位時間(jian)內所做的(de)(de)功的(de)(de)多(duo)少)增大，浪費(fei)大量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)能。當功率(lv)因數(shu)過低(di)時，以致供電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)源輸出電(dian)(dian)(dian)(dian)(dian)流(liu)過大而(er)(er)出現超負(fu)(fu)(fu)載現象(xiang)。電(dian)(dian)(dian)(dian)(dian)容(rong)補償(chang)柜內的(de)(de)電(dian)(dian)(dian)(dian)(dian)腦電(dian)(dian)(dian)(dian)(dian)容(rong)控制（control)系統可解決(jue)以上弊(bi)端，它可根據用(yong)電(dian)(dian)(dian)(dian)(dian)負(fu)(fu)(fu)荷的(de)(de)變(bian)化(hua)，而(er)(er)自動設置。電(dian)(dian)(dian)(dian)(dian)容(rong)組數(shu)的(de)(de)投入，進行電(dian)(dian)(dian)(dian)(dian)流(liu)補償(chang)，從而(er)(er)減低(di)大量(liang)(liang)無功電(dian)(dian)(dian)(dian)(dian)流(liu)，使線路電(dian)(dian)(dian)(dian)(dian)能損耗降到程度，提供一個高素質(zhi)的(de)(de)電(dian)(dian)(dian)(dian)(dian)力源。