C. Cac tiep diem bi ro v1 ho quang; d Tan so nguon di�n thap.
b. Bi�n phap su'.a chua
- Llfa chc;m khf cv di$n cha dung cong suat dong di$n, di$n ap va cac che d9 lam vi$c t- dng Ctng.
- Kiem tra va sll'a chCra nan th�ng, ph�ng gia dB tiep diem, dieu chinh sao cha trung kh6p hoan toan cac tiep diem d9ng va tinh cua Gontactor, khdi d9ng ta, b9 khong che, rdle v.v ...
- Kiem tra 19i lo xo cua tiep diem d9ng xem c6 b! meo, bien d9ng hay d�'it 1$ch tam khoi chat gill'. Phai dieu chinh dung llfc ep tiep diem (c6 the dung llfc ke de kiem tra).
- Thay the bang tiep diem moi khi kiem tra thay tiep diem bi qua man ho�c bi ro chay hong n�ng.
- 0�c bi$t trong dieu ki$n lam vi$c c6 dao chieu hay ham ng-gc, cac tiep diem th-ang h- hong va mai man rat nhanh d�c biE;it la tiep diem d9ng.
3. Hi�n ttiQ'ng hti hong cuc;m day (cu9n hut): a. Nguyen nhan: a. Nguyen nhan:
- Ngan m9ch eve b9 giCra cac vong day do each di$n xau.
- Ngan m9ch giCra cac day dan ra do chat I- gng each di$n xau ho�c ngan m9ch giG'a day dan va cac vong day quan do d?t giao nhau ma khong c6 16t each di$n.
- Out day quan.
- 0i$n ap tang cao qua di$n ap dinh mCtc cua cu9n day. Gach di$n cua cu9n day bi pha hong do bi va d$p cd khf.
- Gach di$n cua cu9n day b! pha huy do cu9n day b! qua n6ng ho?C v1 tfnh toan cac thong so quan 19i sai ho?C di$n ap cu9n day b! nang cao qua, hO?C 16i thep hut khong hoan toan, ho?c dieu chinh khong dung hanh tr1nh 16i thep.
- Do n- 6c emunxi, do muoi, dau, khf h6a chat.. cua moi tr- ang xam thljc lam ch9c thung each di$n vong day.
b. Bi�n phap su'.a chua
- Kiem tra va lo9i trU' cac nguyen nhan ben ngoai gay h- hong cu9n day va quan 19i cu9n day theo mau hO?C tfnh toan 19i cu9n day dung di$n ap va cong suat tieu thv yeu cau.
- Khi quan 19i cu9n day, can lam dung cong ngh$ va ky thu$t quan day, v1 d6 la m9t yeu to quan tr9ng de dgm baa d9 ben va tu6i th9 cua cu9n day.