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ZC-BPFFP阻燃變頻電纜1.8/3kV分相屏蔽
點擊次數:104 發布時間:2023-03-25


通俗(su)的(de)(de)說,變(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)纜就(jiu)(jiu)是主要(yao)用(yong)于變(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)源和變(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)機之(zhi)間(jian)連(lian)接用(yong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)纜,變(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)纜具(ju)有廣闊的(de)(de)應用(yong)領域,適用(yong)于礦(kuang)山、冶金、造紙、鐵路、食品加工(gong)(gong)和金屬加工(gong)(gong)等行業(ye)。那么變(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)纜與普(pu)通電(dian)(dian)(dian)(dian)(dian)纜最(zui)大的(de)(de)區別在(zai)哪里呢?首先我(wo)(wo)們(men)可(ke)以考(kao)慮變(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)纜特殊的(de)(de)工(gong)(gong)作(zuo)(zuo)(zuo)環(huan)境(jing),其(qi)工(gong)(gong)作(zuo)(zuo)(zuo)頻(pin)率(lv)(lv)調節范圍較寬,這(zhe)就(jiu)(jiu)會(hui)導致其(qi)工(gong)(gong)作(zuo)(zuo)(zuo)時無論工(gong)(gong)作(zuo)(zuo)(zuo)頻(pin)率(lv)(lv)高(gao)或者低,都(dou)會(hui)具(ju)有一個(ge)主頻(pin)率(lv)(lv)的(de)(de)波(bo)(bo)形(xing)輪(lun)廓(kuo),同時會(hui)包含許多高(gao)次(ci)諧波(bo)(bo)的(de)(de)產(chan)生,經(jing)過(guo)多次(ci)反射幅值(zhi)疊加后,其(qi)承受的(de)(de)電(dian)(dian)(dian)(dian)(dian)壓可(ke)達(da)到工(gong)(gong)作(zuo)(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)壓的(de)(de)數倍(bei)。在(zai)如此工(gong)(gong)作(zuo)(zuo)(zuo)條件下倘若變(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)纜的(de)(de)絕緣安(an)全系數不夠高(gao),那么非常(chang)容易就(jiu)(jiu)使得電(dian)(dian)(dian)(dian)(dian)纜被(bei)擊穿,從(cong)而引發一系列的(de)(de)安(an)全事故(gu),造成巨大損失。其(qi)次(ci),我(wo)(wo)們(men)可(ke)以想到電(dian)(dian)(dian)(dian)(dian)纜在(zai)工(gong)(gong)作(zuo)(zuo)(zuo)狀(zhuang)態下會(hui)對外發射電(dian)(dian)(dian)(dian)(dian)磁波(bo)(bo)進(jin)行污染。

BP-GVFP2、BP-GVFPP2、BP-GVFP3、BP-FFP、BP-FFP2、BP-FFPP2、BP-FFP3、POTOFLEX-PUR、BPYJVP12R、ZR-BPYJVP12R、BPYJVPX13R、

ZR-BPYJVPX13R

尤其(qi)是(shi)在工(gong)業領域內能廣泛的(de)出現(xian)這一現(xian)象,主要原因是(shi)電(dian)(dian)機(ji)功率比較(jiao)大(da),而且連接(jie)變頻(pin)電(dian)(dian)源與(yu)變頻(pin)電(dian)(dian)機(ji)之間的(de)電(dian)(dian)纜(lan)長度也(ye)比較(jiao)長。這就(jiu)導致了(le)在工(gong)作狀(zhuang)態(tai)時(shi)電(dian)(dian)纜(lan)如同(tong)是(shi)一個向外發射高頻(pin)電(dian)(dian)磁(ci)波(bo)的(de)有效載體,被稱(cheng)之為(wei)電(dian)(dian)磁(ci)波(bo)的(de)環境污染。

針對(dui)(dui)(dui)(dui)(dui)上述變(bian)頻(pin)(pin)(pin)電(dian)(dian)(dian)纜(lan)(lan)(lan)工(gong)(gong)作(zuo)環(huan)境的(de)(de)(de)(de)特殊(shu)性,因此在(zai)設(she)計(ji)變(bian)頻(pin)(pin)(pin)電(dian)(dian)(dian)纜(lan)(lan)(lan)時必(bi)須克服上述問(wen)題(ti)(ti)。設(she)計(ji)變(bian)頻(pin)(pin)(pin)電(dian)(dian)(dian)纜(lan)(lan)(lan)時我們首先(xian)需(xu)要克服的(de)(de)(de)(de)問(wen)題(ti)(ti)就(jiu)是普(pu)通電(dian)(dian)(dian)纜(lan)(lan)(lan)在(zai)變(bian)頻(pin)(pin)(pin)條(tiao)件下可(ke)能(neng)幾(ji)小(xiao)時之內(nei)就(jiu)會(hui)被擊(ji)穿(chuan)。經分(fen)析(xi)(xi)后可(ke)以(yi)得出結論,導(dao)致這一現象發生(sheng)(sheng)(sheng)決(jue)(jue)不是絕(jue)(jue)(jue)緣(yuan)(yuan)老化而(er)產生(sheng)(sheng)(sheng)的(de)(de)(de)(de),究(jiu)其(qi)根(gen)本(ben)可(ke)歸結于高頻(pin)(pin)(pin)脈(mo)沖電(dian)(dian)(dian)?壓對(dui)(dui)(dui)(dui)(dui)絕(jue)(jue)(jue)緣(yuan)(yuan)的(de)(de)(de)(de)影響(xiang)而(er)產生(sheng)(sheng)(sheng)。故電(dian)(dian)(dian)纜(lan)(lan)(lan)設(she)計(ji)時絕(jue)(jue)(jue)緣(yuan)(yuan)材(cai)料的(de)(de)(de)(de)選型就(jiu)顯得非常(chang)(chang)重要了(le),分(fen)析(xi)(xi)常(chang)(chang)見的(de)(de)(de)(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)材(cai)料我們可(ke)以(yi)知道,聚氯乙(yi)(yi)(yi)烯絕(jue)(jue)(jue)緣(yuan)(yuan)常(chang)(chang)常(chang)(chang)會(hui)因其(qi)介質損耗偏(pian)大(da)而(er)加(jia)快絕(jue)(jue)(jue)緣(yuan)(yuan)擊(ji)穿(chuan),交(jiao)聯(lian)聚乙(yi)(yi)(yi)烯絕(jue)(jue)(jue)緣(yuan)(yuan)則(ze)兼有(you)熱、電(dian)(dian)(dian)、機等(deng)優良性能(neng),因此我們選用交(jiao)聯(lian)聚乙(yi)(yi)(yi)烯作(zuo)為(wei)(wei)變(bian)頻(pin)(pin)(pin)電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)(de)(de)絕(jue)(jue)(jue)緣(yuan)(yuan)料。同時我們在(zai)設(she)計(ji)電(dian)(dian)(dian)纜(lan)(lan)(lan)絕(jue)(jue)(jue)緣(yuan)(yuan)厚(hou)度時也可(ke)以(yi)對(dui)(dui)(dui)(dui)(dui)絕(jue)(jue)(jue)緣(yuan)(yuan)厚(hou)度進行適(shi)當(dang)加(jia)厚(hou),使(shi)變(bian)頻(pin)(pin)(pin)電(dian)(dian)(dian)纜(lan)(lan)(lan)更加(jia)安(an)全可(ke)靠。其(qi)次我們需(xu)要解決(jue)(jue)高頻(pin)(pin)(pin)電(dian)(dian)(dian)磁波(bo)(bo)(bo)對(dui)(dui)(dui)(dui)(dui)環(huan)境污(wu)(wu)染(ran)的(de)(de)(de)(de)問(wen)題(ti)(ti)。以(yi)四芯(xin)(xin)低壓電(dian)(dian)(dian)纜(lan)(lan)(lan)為(wei)(wei)例,我們首先(xian)可(ke)以(yi)通過改善絕(jue)(jue)(jue)緣(yuan)(yuan)線(xian)芯(xin)(xin)的(de)(de)(de)(de)排列方式,來(lai)減小(xiao)高頻(pin)(pin)(pin)電(dian)(dian)(dian)磁波(bo)(bo)(bo)對(dui)(dui)(dui)(dui)(dui)環(huan)境的(de)(de)(de)(de)污(wu)(wu)染(ran)。若電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)(de)(de)三根(gen)主線(xian)芯(xin)(xin)與地線(xian)芯(xin)(xin)直接(jie)成(cheng)纜(lan)(lan)(lan),則(ze)諧(xie)波(bo)(bo)(bo)電(dian)(dian)(dian)流產生(sheng)(sheng)(sheng)的(de)(de)(de)(de)磁場(chang)會(hui)不對(dui)(dui)(dui)(dui)(dui)稱(cheng)(cheng);而(er)將地線(xian)芯(xin)(xin)分(fen)解為(wei)(wei)三個截面較小(xiao)的(de)(de)(de)(de)絕(jue)(jue)(jue)緣(yuan)(yuan)線(xian)芯(xin)(xin),把三大(da)三小(xiao)線(xian)芯(xin)(xin)對(dui)(dui)(dui)(dui)(dui)稱(cheng)(cheng)成(cheng)纜(lan)(lan)(lan),則(ze)基本(ben)上能(neng)使(shi)磁場(chang)對(dui)(dui)(dui)(dui)(dui)稱(cheng)(cheng)化,降低了(le)磁場(chang)對(dui)(dui)(dui)(dui)(dui)外的(de)(de)(de)(de)干擾。其(qi)次應(ying)加(jia)強屏(ping)蔽(bi)(bi)結構(gou),一般(ban)都(dou)習慣采用銅絲(si)編織屏(ping)蔽(bi)(bi),實際(ji)上該屏(ping)蔽(bi)(bi)結構(gou)材(cai)料消(xiao)耗大(da)、加(jia)工(gong)(gong)速度慢(man)、屏(ping)蔽(bi)(bi)效(xiao)(xiao)果也不是。為(wei)(wei)了(le)達(da)到更好的(de)(de)(de)(de)屏(ping)蔽(bi)(bi)效(xiao)(xiao)果,同時便(bian)于生(sheng)(sheng)(sheng)產,采用銅帶屏(ping)蔽(bi)(bi)加(jia)銅絲(si)編織結構(gou),可(ke)以(yi)有(you)效(xiao)(xiao)的(de)(de)(de)(de)抑制電(dian)(dian)(dian)磁波(bo)(bo)(bo)對(dui)(dui)(dui)(dui)(dui)外發射。

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