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PHN 3:TRIN KHAI CP THU BAO

1

TRIN KHAI CP THU BAOKHO ST

1RA CP

2KO CP

3CHT CP

4 Xc nh chiu di tuyn. Chn ng i ngn nht, t bng ng. Xc nh a hnh tuyn c khuyn hay khng c khuyn => chn phng php ko cp. di tuyn yu cu 300m. Xc nh v tr bng ng.

BC 1: KHO ST3 Yu cu chung:Cp ra khng xon, gy gp, ri.Phng php ra cp trc tip bng gi rulo: p dng cho tuyn phi lun khuyn hoc tuyn khng c khuyn.t gi ngc vi hng ra cp, cch ct ti thiu 3m.

Phng php ra cp trc thnh cun: p dng cho tuyn khng c khuyn.Trng hp thiu vt t, s t trin khai nhiu.

BC 2: RA CPPhng php 1: Ko cp trc, cht cp sau: - p dng cho tuyn c khuyn st b cp.

- t gi rulo cch ct u tin ti thiu 3m. - Dng so tre lun cp (u cp buc vt nng). - Ko t t thu bao nh khch hng. - Cp lun c 50m hoc ti im r hng phi thc hin dn cp.

BC 3: KO CP

Phng php 2: Ko cp n u cht cp n : - p dng cho tuyn khng c khuyn st in lc. - Ra cp trc thnh cun. - Nng cp ln tng ct v thc hin cht cp.

Ch : Khng ri cp ht tuyn mi nng cp (trnh xe cn gy dp cp, gy si quang).Tiu chun phn ko cp: vng cp tng khong ct 1% (so vi khong cch ca khong ct)Cch ng in 2m (10kV) (cc in p cao hn ngh xem ti liu v theo QCVN).Cp khng b dp, try xc, tch dy gia cng.

BC 3: KO CP

- S dng dy thp bc nha mm (mm, chu c lc cng, to hn so vi cp thu bao).- di khong 1m, gp i nh hnh trn.- Khong cch bn 30cm.- Bn dy theo hnh qu trm, 2 nt tht lin tip cch nhau t 3- 4cm. - 2 nt tht lin tip th dy bn phi o v tr trong ngoi cho nhau to nt tht.

Chun b dy bn cp

BC 4: CHT CPC 3 im cht c th:

BC 4: CHT CP

Cht cp r sang ngCht cp xung t thu bao hoc nh khch hngCht cp i thngCc quy nh v im cht cp:Vi khong ct 30m: 2 khong ct/1 ln.Vi khong ct > 30m: 1 khong ct/1 ln.Khng gy, gp v un cong qu quy nh ti cc v tr cht

BC 4: CHT CPNu bn dy qu khong cch so vi v tr buc th khi buc cp vo gng s b trng cp, cch khc phc dng tay t ti v tr nt bn cui cng, y ton b phn bn v hng chu lc.

Nu bn dy ngn so vi v tr buc vo gng th s khng buc c vo gng, cch khc phc dng tay t ti v tr nt bn u tin, y ton b phn bn v hng bn dy.

45 cm

Cp i thng

Gng