cau ho9-t d(>ng khong dung.
- Do h$ thong lo xo bi 91 set, b! moi co h9c nen t9-o life ep khong dam baa. - Co cau truyen d(>ng bi h- hong.
2.5. ,SlYa chua dao each Iy: ❖ Bi�n phap sda chua : ❖ Bi�n phap sda chua :
► LlJa ch9n khf Cl,J di$n phai dung cong suat, dong di$n, di$n ap va cac che d9 lam vi$c t- ong crng.
► Kiem tra va slfa chiia nan th�ng, ph�ng L- Bi dao d9ng , dieu ch1nh sao cho trung khe1p hoan toan cac L- Bi dao d9ng va ngam co dinh cua dao each ly.
► Kiem tra l?i lo xo xem c6 bi meo, bien d?ng hay d�t 1$ch tam khoi chot giii. Phai dieu chinh dung llJc ep tiep diem (c6 the dung llfc ke de kiem tra).
► Thay the bang L- Bi dao d9ng mdi khi kiem tra thay L- Bi dao d9ng qua man ho�c bl ro chay hong n;flng.
► Kiem tra va loc;ti tn)' cac nguyen nhan ben ngoai gay h- hong L- Bi dao d9ng, th- ong xuyen kiem tra va bao d- Bng h$ thong truyen d9ng de h$ thong lam vi$c dam bao d9 tin c�y.
► Tr- ong hc;Jp cac b9 ph�n tren h- hong n�ng th1 ta c6 the thay the tu'ng b9 ph�n th�m chf c6 the thay toan b9 dao each ly.
❖ CAU CHI Tl/ ROI (FCO: fure cut out) : la m9t dr;ing dao each ly d�c bi�t.
0- <;Jc che t9o d�c bi$t va kem chung vdi cau chi khi cau chi dCl'I: n6 tlj nga ra va nhan vien kiem tra d� dang nhin thay.
La thiet bi m9t pha lap phfa so cap cua tr?m bien ap phl,J tai cong suat d- di 1 OOOkVA, dung de bao v$ cac slJ co nh- : qua tai phfa thU' cap hay ngan m?ch cac cu9n day trong may bien ap. Oay la lo?i cau chi trung ap don gian, cat m?ch t- ong doi chfnh xac va an toan (xem them d phan cau chi).
Hinh 2.7: Cau ch1 ti/ rdi FCO (fure cut out) (Dao each ly d�c bi�t)