當線路電源超過驅動器kV-A額定值的10倍時，請添加線路電抗器。

　　應使(shi)用3%阻(zu)抗線(xian)電(dian)(dian)抗器(qi)(qi)(qi)(qi)(qi)(qi)來降(jiang)低電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)(qi)(qi)開關(guan)，線(xian)路(lu)陷波，直流總(zong)線(xian)過(guo)(guo)壓(ya)跳閘以及(ji)逆變(bian)器(qi)(qi)(qi)(qi)(qi)(qi)過(guo)(guo)流和過(guo)(guo)壓(ya)條(tiao)件引(yin)起的(de)(de)電(dian)(dian)源線(xian)瞬態(tai)電(dian)(dian)壓(ya)。線(xian)路(lu)電(dian)(dian)抗器(qi)(qi)(qi)(qi)(qi)(qi)可gai善真正的(de)(de)輸(shu)入功率因數并減(jian)(jian)少驅(qu)動(dong)器(qi)(qi)(qi)(qi)(qi)(qi)之間的(de)(de)串擾。輸(shu)入線(xian)路(lu)電(dian)(dian)抗器(qi)(qi)(qi)(qi)(qi)(qi)在(zai)短路(lu)條(tiao)件下(xia)為驅(qu)動(dong)器(qi)(qi)(qi)(qi)(qi)(qi)提供(gong)一(yi)些保護(hu)。如(ru)果電(dian)(dian)源防爆變(bian)壓(ya)器(qi)(qi)(qi)(qi)(qi)(qi)kV-A額定(ding)值大于驅(qu)動(dong)器(qi)(qi)(qi)(qi)(qi)(qi)kV-A額定(ding)值的(de)(de)10倍，則建議使(shi)用線(xian)路(lu)電(dian)(dian)抗器(qi)(qi)(qi)(qi)(qi)(qi)，以便在(zai)電(dian)(dian)源變(bian)壓(ya)器(qi)(qi)(qi)(qi)(qi)(qi)短路(lu)時盡量減(jian)(jian)少對(dui)驅(qu)動(dong)器(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)損壞。此線(xian)路(lu)阻(zu)抗取決于驅(qu)動(dong)器(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)短路(lu)額定(ding)值以及(ji)供(gong)電(dian)(dian)配電(dian)(dian)變(bian)壓(ya)器(qi)(qi)(qi)(qi)(qi)(qi)。具體而言，線(xian)路(lu)阻(zu)抗須(xu)大于或等于電(dian)(dian)源防爆變(bian)壓(ya)器(qi)(qi)(qi)(qi)(qi)(qi)額定(ding)值與(yu)驅(qu)動(dong)器(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)比率

　　請使用(yong)單獨的導管進行輸入電(dian)源(yuan)，輸出(chu)電(dian)源(yuan)和控制(zhi)接線(xian)。更具(ju)體(ti)地說(shuo)，在連接VFD的電(dian)源(yuan)和控制(zhi)線(xian)路(lu)時，應(ying)遵(zun)循(xun)以下準則：

　　將輸(shu)入交流電(dian)源線安裝在自己的剛性鋼管中。

　　將輸出電機接(jie)線安裝在自己的剛性鋼管中。

　　將控(kong)(kong)制線(xian)(xian)安裝(zhuang)在自(zi)己的(de)剛(gang)性鋼管中(zhong)。低壓(ya)直流控(kong)(kong)制線(xian)(xian)和120 Vac控(kong)(kong)制線(xian)(xian)應(ying)位(wei)于不同的(de)導(dao)管中(zhong)。當連接到VFD的(de)控(kong)(kong)制板時(shi)，雙絞線(xian)(xian)和屏蔽線(xian)(xian)都足夠了。建議使(shi)用兩線(xian)(xian)和三(san)線(xian)(xian)連接。對(dui)于許多驅動器，小導(dao)線(xian)(xian)尺(chi)寸為18 AWG。

　　確保所有接(jie)(jie)地(di)連接(jie)(jie)牢固且正確接(jie)(jie)地(di)。屏蔽(bi)(bi)層(ceng)應(ying)僅在電(dian)纜的(de)一端接(jie)(jie)地(di)，以避免(mian)接(jie)(jie)地(di)回路。在VFD端連接(jie)(jie)屏蔽(bi)(bi)層(ceng)時，將其連接(jie)(jie)到機箱接(jie)(jie)地(di)線耳。注意(yi)：在將屏蔽(bi)(bi)連接(jie)(jie)到VFD的(de)接(jie)(jie)地(di)片之前，請務必(bi)斷開VFD的(de)電(dian)源。

　　從電源線(xian)(xian)(xian)分開控(kong)制和反饋接線(xian)(xian)(xian)至少(shao)12英寸。注(zhu)意事項：在具有多個(ge)VFD的(de)安裝中，所有VFD的(de)輸(shu)入電源線(xian)(xian)(xian)可(ke)以在同(tong)(tong)一(yi)(yi)個(ge)管(guan)道中，控(kong)制線(xian)(xian)(xian)可(ke)以在同(tong)(tong)一(yi)(yi)個(ge)管(guan)道中，但每個(ge)電機的(de)輸(shu)出接線(xian)(xian)(xian)須位于(yu)單獨的(de)管(guan)道中。唯 一(yi)(yi)的(de)例外(wai)是如(ru)果一(yi)(yi)個(ge)VFD用于(yu)操作多個(ge)電機，則所有電機的(de)輸(shu)出接線(xian)(xian)(xian)可(ke)以在同(tong)(tong)一(yi)(yi)個(ge)導管(guan)中。

　　在接地(di)系統(tong)上使(shi)用(yong)該驅(qu)動(dong)(dong)器(qi)。切勿使(shi)用(yong)浮動(dong)(dong)地(di)面(mian)。某些制造商不建議在任何子(zi)微型或(huo)(huo)更新(xin)設計的驅(qu)動(dong)(dong)器(qi)上使(shi)用(yong)浮動(dong)(dong)輸入。如果線(xian)路(lu)上沒有干(gan)擾，驅(qu)動(dong)(dong)器(qi)應該運行良好 - 但嚴重的共模噪聲可能導致誤跳閘或(huo)(huo)更糟(zao)。

　　注意：某些(xie)傳統(tong)VFD在(zai)直流總線(xian)和地之間使用(yong)一串電(dian)阻，這意味著(zhu)共模噪聲不(bu)是問(wen)題。一些(xie)積(ji)分-hp驅(qu)動器(qi)(qi)也使用(yong)電(dian)阻串，因此使用(yong)這些(xie)浮動接(jie)地可能沒問(wen)題。但是，不(bu)建議將(jiang)浮點系統(tong)用(yong)于(yu)較新的驅(qu)動器(qi)(qi)技術(shu)。