CNG HO X HI CH NGHA VIT NAM

QCVN QT-5:2008/BCT

QUY CHUN K THUT QUC GIA V K THUT IN

Tp 5 KIM NH TRANG THIT B H THNG IN National Technical Codes for Testing, Acceptance Test for Power Facility

H NI -2008

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Li ni u B Quy chun K thut in QCVN QT 5:2008/BCT; QCVN QT 6:2008/BCT; QCVN QT 7:2008/BCT l vn bn quy phm php lut bt buc p dng cho cc n v hot ng in lc trn lnh th Vit Nam. Quy chun k thut in bao gm cc quy nh v thit k, xy lp, vn hnh v kim tra cc trang thit b sn xut, truyn ti in v phn phi in nng. Quy chun k thut in do B Cng thng ch tr bin son, B Khoa hc v Cng ngh thm nh. Quy chun k thut c B Cng thng ban hnh theo Quyt nh s 54/2008/Q-BCT ngy 30 thng 12 nm 2008. Quy chun k thut in c xy dng da trn vic r sot, sa i, b sung v bin tp li ni dung ca 03 b Quy phm Trang b in, bao gm Quy phm thi cng cng trnh in (TCN-1-84), Quy phm vn hnh nh my in v li in (QPDT-01-71), Tiu chun ngnh v Khi lng v tiu chun th nghim, nghim thu, bn giao cc cng trnh in (TCN-26-87). Vic r sot sa i Quy chun c tin hnh trong bi cnh Vit Nam gia nhp WTO v chnh thc tr thnh thnh vin ca WTO vo thng 1/2008. p ng vi vic gia nhp WTO th nhng tiu chun bt buc bao gm c tiu chun k thut phi khng phi l ro cn k thut trong thng mi quc t v hng ti vic hi ho vi tiu chun quc t. Trong bi cnh nh vy, nhim v t ra cho ln r sot, sa i ny l chn lc b ra nhng qui nh khng ph hp l qui nh bt buc, loi b cc quy nh qu chi tit mang tnh cht c th ca cng ngh, tp trung vo cc quy nh mang tnh cht c bn nht m bo mc tiu vn hnh an ton, n nh cc trang thit b ca h thng in Vit Nam, thng qua nhm m bo an ninh h thng in v an ton cho cng ng. Do thi gian hn hp, khi lng cng vic ln v rt phc tp, chc chn b Quy chun khng trnh khi mt s sai st, rt mong nhn c cc kin ng gp ca c gi. Cng nhn dp ny, V Khoa hc v Cng ngh, B Cng thng xin chn thnh cm n C quan hp tc quc t Nht Bn (JICA), B Khoa hc v Cng ngh, B Xy dng, B Nng nghip pht trin nng thn, Tp on in lc Vit Nam, v cc c quan, t chc lin quan quan tm h tr, to iu kin v nhn lc cng nh vt lc cho T cng tc trong qu trnh xy dng quy chun. Xin chn thnh cm n cc chuyn gia tm huyt trong nc v quc t khng qun ngi kh khn, ng gp thi gian, cng sc v nhng kinh nghim qu bu ca mnh cng V Khoa hc, Cng ngh hon thnh cng tc xy dng h thng tiu chun k thut ngnh in, ng gp mt phn nh cho cng cuc xy dng t nc. Xin trn trng cm n, V Khoa hc v Cng ngh - B Cng Thng

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Phn I

QUY NH CHUNGiu 1. Mc ch Quy chun k thut ny quy nh cc vn cn thit lin quan n hot ng kim tra trong qu trnh lp t, kim nh hon thnh v kim nh nh k i vi trang thit b li in v cc nh my in. Kim tra trong khi lp t i vi cc nh my nhit in v cc cng trnh thu cng ca thu in, kim nh hon thnh i vi cc cng trnh thu cng ca thu in khng thuc phm vi iu chnh ca Quy chun k thut ny. iu 2. Phm vi p dng Quy chun k thut ny c p dng i vi hot ng kim tra cc trang thit b ca li in, cc nh my thu in v nhit in. Trong quy chun ny, cc trang thit b c ngha l tt c cc phn ni vi li in quc gia Vit Nam. Phm vi p dng i vi tng trang thit b quy nh nh sau: 1. Trang thit b li in Cc iu khon lin quan n trang thit b li in c quy nh trong Phn II, c p dng cho vic kim tra k thut cc trang thit b in ca ng dy truyn ti v phn phi, cc trm bin p c in p ti 500kV. Vic kim tra hon thnh v cc kt cu nh ct in v mng nm ngoi phm vi ca quy chun ny. 2. Cc nh my thu in Cc iu khon lin quan n nh my thu in c quy nh trong Phn III, c p dng cho cc cng trnh thu cng v cc thit b in ca cc nh my thu in c th nh sau: a) Cc cng trnh thu cng ca tt c cc nh my thu in Vit Nam v ni vi li in ca Vit Nam, tr cc nh my thu in c p c bit c quy nh ti Ngh nh s 143/2003/N-CP ngy 28 thng 11 nm 2003 ca Chnh ph quy nh chi tit thi hnh mt s iu ca Php lnh Khai thc v bo v cng trnh thy li. b) Cc thit b in ca cc nh my thu in Vit Nam v ni vi li in quc gia Vit Nam, c cng sut bng hoc ln hn 30 MW. 3. Cc nh my nhit in Cc iu khon lin quan n nh my nhit in c quy nh trong Phn IV, c p dng cho vic kim tra cc thit b c kh v in nh l hi, tua bin hi, tua bin kh v my pht in ca cc nh my nhit in Vit Nam v ni vi li in quc gia Vit Nam, c cng sut bng hoc ln hn 1MW. iu 3. Gii thch t ng 1. C quan c thm quyn l B Cng Thng hoc cc c quan c giao quyn t chc thc hin vic kim tra trang thit b li in v cc nh my in. 2. Ch s hu l t chc hoc c nhn lm ch trang thit b li in v cc nh my in, c trch nhim php l v vn hnh trang thit b li in v cc nh my in ny. 3. Kim tra vin l ngi thuc B Cng Thng hoc do B Cng Thng u nhim thc hin cng vic kim tra theo Lut in lc, Ngh nh s 105/2005/N-CP quy nh chi tit v hng dn thi hnh Lut in lc v quy chun k thut ny. 4. Kim tra trong khi lp t l kim tra xc nhn vic thc hin tng giai on cc cng vic thi cng ti cng trng bao gm c cng vic sa cha, i tu i vi mi loi thit b (v d my bin th, my ct, my pht in...) hoc tng loi cng vic (nh vic u ni dy in, vic u ni cp ngm ...). 5. Kim tra hon thnh sau lp t l kim tra thc hin khi hon thnh cng vic k thut xc nhn cht lng hon thnh tng hp cng trnh trc khi bt u vn hnh. 6. Kim tra nh k l kim tra thc hin bng quan st v o nu cn thit duy tr tnh nng hot ng bnh thng v phng trnh s c trong khong thi gian quy nh.

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iu 4. Hnh thc kim tra 1. Ch s hu phi thc hin tt c cc t kim tra theo quy chun k thut ny. Nguyn tc l ch s hu phi t thc hin cc ni dung kim tra. Ch s hu c th thu t chc, c nhn khc thc hin kim tra vi iu kin l ch s hu chu trch nhim, trong trng hp , vic kim tra vn phi tun th Quy chun chun k thut ny. Ch s hu phi quan st vic kim tra, yu cu np bo co kt qu kim tra, kim tra bo co v cc ni dung nh mc ch, ni dung, phng php v kt qu kim tra. C quan chu trch nhim tin hnh kim tra khng k ch s hu c nu trong cc iu khon p dng. tin hnh kim tra, ch s hu phi nm c mc ch, ni dung, phng php, kt qu v gi ti liu theo di cn thit. 2. C quan c thm quyn s kim tra v s tun th ca n v thc hin bao gm kim tra ti ch v thm tra ti liu. v C quan c thm quyn la chn phng php kim tra theo tnh trng thc t ca trang thit b. Trong trng hp pht hin c s vi phm hoc khng tun th ng quy chun k thut th C quan c thm quyn yu cu Ch s hu khc phc hoc p dng cc bin php theo quy nh. 3. Quy chun k thut ny ch quy nh nhng yu cu ti thiu cho cc cng trnh v thit b chnh v mt phng trnh him ho cho cng ng v s c ln ca h thng in. Nu thy cn thit, Ch s hu phi thc hin cc kim tra v iu tra pht hin s c tim n v phi p dng cc bin php cn thit, nu cn, nu khng mu thun vi cc iu khon quy nh trong quychun k thut ny. 4. Quy chun k thut ny quy nh khung cho cc kim tra. Ch s hu s quyt nh phng php v quy trnh chi tit da vo tnh trng thc t ca tng trang thit b. 5. Quy chun k thut ny khng quy nh v kim tra thng xuyn trong vn hnh v kim tra bt thng sau cc s kin bt kh khng nh thin tai. Phn II

TRM BIN P, NG DY TRUYN TI V PHN PHI INChng 1

QUY NH CHUNGiu 5. Gii thch t ng Trong quy chun k thut cc t di y c hiu nh sau: 1. Yu cu k thut l cc yu cu v mt k thut ca thit b hoc vt liu c m t chi tit ti cc ti liu. Ch s hu a yu cu k thut cho nh ch to khi t hng thit b hoc vt liu. 2. Cng tc ri dy l cng tc cng dy trn ct. 3. Trm bin p l cc cng trnh bin i in nng. Trm bin p bao gm cc thit b trn ct. 4. ng dy ti in trn khng l ng dy hoc cc thit b dn in trn khng. 5. Ct l cc kt cu ph tr cho cc thit b dn in, bao gm ct g, ct thp, hoc ct b tng... 6. Cc yu cu k thut i vi cng tc lp t l cc yu cu phi t c v mt k thut i vi cng tc lp t c m t c th trong cc ti liu. Ch s hu a ra cc yu cu ny trong hp ng vi bn xy lp. 7. Dy chng st l dy ni t hoc gn nh khng cch in, thng c lp t pha trn dy pha ca ca ng dy hoc trm bin p bo v trnh b st nh. 8. OPGW l dy chng st cp quang. 9. Kim tra xut xng l kim tra c tin hnh bi nh ch to trc khi chuyn thit b hoc vt liu cho ch s hu m bo tnh nng theo trch nhim ca nh sn xut. 10. Kim tra bng mt l kim tra bng cch nhn bn ngoi ca i tng. 11. Kim tra dc tuyn l kim tra bn ngoi ca thit b v hon cnh xung quanh dc theo tuyn ng dy. Chng 2

T CHC V QUN L VN HNH V BO DNGiu 6. C cu t chc

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Kim tra vic thc hin cc yu cu v t chc quy nh ti Quy chun k thut in Tp 6 Phn 2, phi c thc hin trong cc t kim tra hon thnh v kim tra nh k. iu 7. Ti liu Kim tra vic thc hin cc yu cu v ti liu theo quy nh ti Tp 6 Quy chun k thut in v vn hnh, sa cha trang thit b, cng trnh nh my in v li in. Cc quy nh Chng 1 Phn VI Tp 6 phi c thc hin trong cc t kim tra hon thnh v kim tra nh k. Chng 3

KIM TRA BN GIAOiu 8. Quy nh chung Ch s hu (hoc Nh thu ca ch s hu) v nh ch to phi tin hnh cc bin php kim tra vo cc thi im bn giao thch hp gia cc bn khng nh s lng v chng loi cng nh vic vn chuyn nhm m bo khng c b bt k h hng no i vi vt liu, thit b in trc khi vn hnh ho vo li in. Ch s hu phi chu trch nhim php l trong vic xc nhn ni dung ny da trn bin bn kim tra ca nh thu. iu 9. Chi tit ca cng tc kim tra Phi kim tra sn phm c chuyn n v s lng v chng loi m bo s ph hp vi cc iu khon chi tit trong n t hng v m bo vic vn chuyn khng gy bt k h hng no. Da trn cc kt qu kim tra xut xng, bn nhn phi kim tra m bo kt cu, thng s v cc c tnh k thut ca sn phm tun th theo cc iu khon chi tit trong n hng. Chng 4

KIM TRA TRONG KHI LP TMc 1. Quy nh chung iu 10. Quy nh chung Kim tra trong khi lp c thc hin xc nhn vic hon thnh ca mi giai on thi cng ti hin trng k c vic sa cha v i tu mi thit b (v d, my bin p, my ct, ) hoc mi cng on (v d, cng tc lp t ng dy, thi cng cp ngm, ). Ch s hu cng trnh phi gim st qu trnh kim tra. Ch s hu c th yu cu nh ch to hoc nh thu xy lp trnh bo co kim tra. Ch s hu phi kim tra v r sot ton b cng vic da trn bo co ny. Mc 2. ng dy ti in trn khng iu 11. in tr ni t ca cc ct, x, gi v h thng ni t. Phi kim tra in tr ni t ca cc ct, x, gi i vi ng dy ti in trn khng v trng thi cc dy ni t. 1. in tr ni t in tr ni t phi c o theo cc quy nh sau y: i vi ct thp, in tr tng cng ca 4 chn phi c o bng my o in tr ni t khi hon thnh cng tc p mng ct. i vi cc ct b tng, cc cng tc o c phi c thc hin sau khi ct c lp t v cc h thng ni t chn. Ch s hu phi kim tra tng th m bo cc in tr ni t thp hn cc gi tr quy nh trong Quy chun K thut. 2. Trng thi ca h thng ni t Phi kim tra v chng loi, dy, ng knh, tnh trng ca cc dy ni t v bt k hin tng khc thng ca cc mi ni dy. Ch s hu phi kim tra tng th m bo in tr ni t khng qu cc gi tr quy nh trong Quy chun k thut. iu 12. Kim tra dy dn trn khng Chng loi, kch thc, tnh trng ca dy dn trn khng v dy chng st phi c kim tra khi hon thnh cng tc lp t. Cc hng mc sau y phi c kim tra bng mt 1. Cc dy dn trn khng v cc dy chng st (s lng, bn cht, cc h hng...) 2. Ph kin

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Ch s hu phi kim tra tng th m bo rng khng c s bn lng hay h hng no i vi dy dn v dy chng st v m men xon ti cc im ni t gi tr quy nh trong yu cu k thut thi cng. iu 13. Kim tra mi ni dy dn Phi kim tra iu kin p ca cc ng ni c s dng ni dy dn v dy ni t. Ch s hu phi kim tra tt c cc mi ni theo cc tiu ch sau y. 1. Chiu di on ni so vi ng knh dy dn phi ph hp vi lc p v khng c bt thng. 2. i vi dy dn nhm li thp, cc ng ni khng b lch tm. iu 14 Kim tra dy chng st c cp quang (OPGW) Phi kim tra tnh trng ca dy chng st c cp quang. trong qu trnh thi cng v khi hon thnh, ch s hu phi kim tra bng mt v o cc mc sau: 1. OPGW khng c h hng. 2. Momen xon ti cc bu lng ni nh hn quy nh ca nh sn xut hoc cc c tnh k thut. 3. Bn knh cong ph hp vi quy nh ca nh sn xut. 4. Tn tht truyn tn hiu khng ln hn tiu chun quy nh. Nu cc tr s khc bit ln, cn thc hin cc bin php x l. iu 15. Kim tra khong trng cch in Khong trng cch in gia dy v x hoc gia cc dy cn phi kim tra sau khi hon thnh vic ri dy v u ni. Ch s hu phi kim tra m bo rng khong trng khng nh hn so vi gi tr cho php c quy nh trong Quy chun k thut. iu 16. Kim tra s cch in Quy cch v cc iu kin ca s cch in, s lng bt cch in trong chui cn c kim tra sau khi lp t. Ch s hu phi kim tra bng mt hoc cch khc cho cc hng mc sau y: - Quy cch, ng knh, ph kin, s lng, cch lp theo yu cu k thut. - Khng c b nt, hng, nhim bn trn bt s cch in, mc khim khuyt bn ngoi. ph hp vi Tiu chun IEC 60383-1(1993) Cch in ca ng dy trn khng cp in p trn 1000 Vphn 1 cch in gm hoc thy tinh cho h thng in p xoay chiu nh ngha, phng php th nghim v quy chun p dng - Kp cch in khng c bin dng hay c hin tng bt thng v phi c lp t theo quy trnh lp t s. - Cht ch m ln hn 45 . - Khng c hin tng bt thng i vi mt ngoi s (ng rnh, nt, g gh) iu 17. Khong vt, gc ngang v cao ti thiu so vi mt t Khong vt, gc nm ngang v cao ti thiu thc t so vi mt t cn c kim tra sau khi cng dy. Ch s hu phi kim tra v tr tm ct thp v cc ct b tng pht hin sai lch so vi v tr thit k, khong vt v gc nm ngang. Mc 3. ng cp ngm iu 18. Kim tra hp ni cp Cn kim tra cc hp ni cp c xy lp ti hin trng c tun theo phng php xy lp v cc yu cu k thut ca nh sn xut. 1. in tr cch in Cn kim tra mi li cp c c cch in vi t khng. (Vi cc loi cp nhiu li, cn kim tra nhng li ny c c cch in vi nhau). Cc php o cn c thc hin bng mgmmet c in p 1000 V hoc 2500V. in tr cch in ny cn c o sau khi t mt in p th nghim

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trong thi gian 1 pht. Trng hp cp ngm di c in dung ln n mc kim hin th ca my o in tr khng n nh trong mt khong thi gian ngn, in tr cch in ca nhng loi cp nh vy cn c o sau khi kim hin th n nh. Nhit v m cn c ghi chp ti mi ln o. Cc mc in tr cch in phi ln theo quy nh. 2. Cc phng php xy lp v kch thc ca cc hp ni cp Da trn cht lng v cc bn ghi chp xy lp do n v xy dng cng trnh thc hin, cn kim tra cc hp ni cp c xy lp theo ng cc yu cu k thut ca nh ch to, v kch thc ca cc hp tun theo cc yu cu ny (s xy lp) trong tt c cc hng mc lin quan bao gm di on loi b o cp, di ca cc lp bc kim b l ra ngoi v di ca phn nh du trn cc vt liu cch in cn c kim tra p ng cc mc dung sai theo yu cu ca nh ch to. 3. thng ca cp Nu c cc yu cu k thut ca nh ch to, cp cn c lm thng bng nhit. thng ca cp cn c o m bo rng cong ca cp p ng cc yu cu. Ni ghp cc dy dn (ch i vi u cp loi EB-GS, EB-OS1)

Chp nn p c ng

Ph n nh d t u cp v cch: Y t m ph n nh d o n ghp n

u t i kho ng cch: Z ph n o kho ng t y c a GIS t i u m b o cng idy d n an to n.

V M t y c a GIS

d n

i n

L p bn d n-g n k

bn ngo i B ng v i

B ov Ph n nh d u

B ng

ng ho c dy b c kim

Hnh 2-14-1: Cu trc ca u cp kiu trt (Bn v tham kho) Khi thc hin cng on lp hp u cp vo ngn thit b GIS, phi lu nu lp t khng ng s gy ra tnh trng tip xc km v qu nhit sau lp t, dn ti h hng u cp v tip im ca thit b GIS, cng nh lm h hng thit b GIS. Sau khi nhng iu kin ca vic ghp ni c kim tra bng thnh gic v xc gic, khong cch t mt y ca GIS ti phn nh du cn c o v kim tra c p ng cc yu cu k thut ca nh ch to. iu 19. Kim tra Pha Khi hon thnh cng trnh xy dng cp, vic kim tra pha cui cng cn c thc hin c hai u cp nhm ngn nga vic ni cp sai. Vic o cc cc v cc ni t cn phi c xem xt. Vi mi pha, ti cc ni t phi ni t lp li, in tr cch in gia dy dn vi t ti cc o lng phi c o. Khi gi tr o l 0 M-ohm s chng t pha ny c ni t, khi gi tr o khc 0 s chng t pha ny c cch ly. iu 20. Ni t Cn kim tra cc v kim loi v b bo v ca cp ngm c ni t ng quy cch. 1. Cc iu kin ca ni t Ni t cn c kim tra tun th theo thit k k thut ca cng trnh.1

EB-OS: Hp u cp ngm du (kiu trt)

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2. in tr ni t Gi tr in tr ni t cn c kim tra phi nh hn 100. iu 21. Cc iu kin ca cc gi cp Cc iu kin ca gi cp cn c kim tra tun theo cc yu cu k thut v thi cng. S lng, biu hin bn ngoi (h hng b mt), v tr v cc lin kt bng bulng ca cc gi cp cn c kim tra bng mt. iu 22. Lp t cp Cn kim tra m bo khng c vt nng trn cp, khng c h hng c hi trn cp v cp khng b un cong nh hn bn knh cong cho php. 1. Sc cng cp Sc cng cp cho php sau cn c kim tra bo m khng c bin dng hoc dch chuyn li cp. Sc cng cp cho php = 70NA (N) N: S li, A: tit din cp (mm2) 2. Ngoi lc cho php xung quanh cp Cn kim tra m bo khng c s thay i trn b mt v cng hoc mc chng mi mn ca o cp v khng c mo cp do ngoi lc gy ra. 3. Bn knh un cong ca cp Bn knh cong trong bng sau cn c kim tra sao cho cc c tnh c v in ca cp khng b suy gim. Bng 2-18-1 Bn knh cong cho php i vi Cp Loi cp CV (v nha tng hp) OF v bc nhm Mt li Ba li Mt li Ba li OF v bc ch CV v bc thp khng g Ba li Mt li Bn knh cong 11 ng knh ngoi ca cp 8 ng knh ngoi ca cp 15 ng knh ngoi trung bnh ca v bc nhm) 12 ng knh ngoi ca cp 10 ng knh ngoi trung bnh ca v bc ch 17,5 ng knh ngoi trung bnh ca v bc thp khng g

(Bn knh cong cho php trong qu trnh lp t)= (Bn knh cong cho php)1,5 Ghi ch: Nu nh ch to cp c tiu chun quy nh khc quy nh trn, th theo quy chun ca nh ch to iu 23. in tr cch in v cp in tr cch in gia v cp v t cn c o m bo khng c s bt thng trong lp cch in ny. Php o cn c thc hin bng mgmmet c in p 1000V v in tr cch in phi ln hn cc tiu ch sau. Bng 2-19-1 in tr cch in cho php ca v cp Loi cp Cp c cc lp bc chng nc Cp c lp chng chy Cp du (OF) iu 24. un khc ca cp in tr cch in Khng thp hn 10 / Khng thp hn 1 / Khng thp hn 1 / .

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Cn kim tra cp c lp t theo ng yu cu thit k k thut. Cc nhp v khong un khc cn c o v kim tra p ng cc gi tr cho php. V tr v s lng cc m hm cn c kim tra tun theo ng yu cu thit k k thut. iu 25. Cc im ni t Nhng on cp ngn loi cp mt li, mt u cp c ni t ngn chn cc dng in vng do cm ng in t. Vic tip t cn c kim tra tun th cc yu cu thit k k thut. iu 26. S lu khng vi cc cp, ng ng khc, v.v Cn m bo s lu khng gia cp lp t v cc ng dn khc (chiu sng, h p, cao p, ng ng ga) p ng yu cu bng kim tra trc quan, hoc l c bin php an ton nhm m bo yu cu. Mc 4. Thit b ca trm bin p iu 27. Cc hng mc kim tra my bin p lc 1. o tnh trng cch in (1) o in tr cch in cc cun dy R60 m bo kt qu o c chch xc cn tun theo cc iu kin sau: a) Thao tc o ch tin hnh nhit cun dy t 10 oC tr ln i vi cc my bin p t 150 kV tr xung v t 30 oC tr ln i vi cc my bin p t 220 kV tr ln; b) i vi cc my bin p 110 kV, cng sut 80.000 kVA tr ln hoc in p 220 kV tr ln nn o cch in nhit sai khc khng qu + 5 oC so vi nhit khi nh ch to o i vi cc my bin p di 150 kV, cng sut di 80.000 kVA sai khc nhit trn khng qu 10 oC; Nu nhit o ti hin trng sai khc so vi nh ch to th cn quy i kt qu v cng mt nhit theo h s K1 trong bng 2-23-1; Bng 2-23-1. H s quy i K1 Chnh lch nhit , oC H s quy i K1 1 1,04 2 1,08 3 1,13 4 1,17 5 1,22 10 1,50 15 1,84 20 2,25 25 2,75 30 3,40

Trong trng hp chnh lch nhit khng c trong bng trn th ta c th tnh ra bng cch nhn cc h s tng ng; V d: Chnh lch nhit l 9 oC khng c trong bng 2-23-1; K9 = K5K4 = 1,22. 1,17 = 1,42 c) Nhit cun dy i vi cc my bin p t 35 kV tr xung c coi l bng nhit lp du trn cng, nhit cun dy i vi cc my bin p trn 35 kV c coi l nhit cun dy cao p pha B xc nh bng phng php in tr mt chiu theo cng thc sau: tx = Rx / R0 (235 + t0 ) - 235 R0 - in tr cun dy o nh ch to nhit t0 Rx - in tr cun dy o nhit tx d) i vi cc my bin p 110 kV tr ln trc khi o in tr cch in cn tip a cun dy cn o khng di 120 giy. Nu kt qu cn kim tra li th trc khi o ln tip theo cn tip a li cun dy cn o khng di 300 giy. Nu khng c s liu ca nh ch to so snh th c th tham kho gi tr ti thiu cho php ca in tr cch in theo bng 2-23-2. Bng 2-23-2. Gi tr in tr cch in, M Cp in p cun cao p T 35 kV tr xung c cng sut di 10.000 kVA T 35 kV c cng sut 10.000 kVA Nhit cun dy, oC 10 450 900 20 300 600 30 200 400 40 130 260 50 90 180 60 60 120 70 40 80

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tr ln v 110 kV tr ln khng ph thuc cng sut Nu my cha y du th cho php tin hnh o R khi mc du cch mt my 150 - 200 mm, vi iu kin cc phn cch in chnh ca my ngm hon ton trong du. (2) in tr cch in ca cc mch iu khin in tr cch in ca cc mch iu khin vi t phi c o bng mgm met c in p 500 V. Quy chun ca cc in tr cch in phi ln hn 2 M (3) o tg o tang gc tn tht in mi (tg) bt buc i vi my bin p t 110 kV tr ln v my bin p t 35 kV tr ln c cng sut t 10000 kVA tr ln. m bo kt qu chnh xc cn theo cc lu a, b, c ca mc (1). Cng ging nh R60 tr s ca tg khng tiu chun ha m so snh vi s liu xut xng hoc so vi ln th nghim trc. Tuy nhin khi khng c cc s liu ny c th tham kho gi tr ti a cho php ca tg %, cun dy my bin p ti bng 2-23-3. Bng 2-23-3. Gi tr tg % cun dy my bin p Cp in p cun cao p T 35 kV tr xung c cng sut di 10.000 kVA Trn 35 kV c cng sut 10.000 kVA tr ln v trn 110 kV khng ph thuc cng sut Nhit cun dy, oC 10 1,2 0,8 20 1,5 1,0 30 2,0 1,3 40 2,6 1,7 50 3,4 2,3 60 4,5 3,0 70 6,0 4,0

Trng hp nhit khi o sai khc vi nhit nh ch to o lc xut xng, ta cn quy i v cng mt nhit theo h s K2 trong bng 2-23-4: Bng 2-23-4. H s quy i K2 Chnh lch nhit oC H s quy i K2 1 1,05 2 1,10 3 1,15 4 1,20 5 1,25 10 1,55 15 1,95 16 2,4

Nu chnh lch nm ngoi bng trn ta c th tnh ra bng cch nhn cc h s tng ng nh trong trng hp vi R60 mc (1) phn b). o tg cch in cun dy chu nh hng ca du cch in trong my, nn nh gi ng mc cch in cun dy so snh vi nh ch to cn loi tr nh hng ca du cch in. tg cun dy = tg o K3 (tg du 2 - tg du 1) tg cun dy l tg thc t ca cun dy my bin p lc tg o l gi tr o c trong qu trnh th nghim tg du 1 l tg du cch in trong my khi xut xng c quy i v nhit o tg du 2 l du c vo my ti hin trng c quy i v nhit o K3 - H s quy i ph thuc vo kt cu my c gi tr gn bng h s trong bng 2-23-5 Vic quy i gi tr tg du theo nhit thc hin nh h s K3 Bng 2-23-5. H s quy i K3 Chnh lch nhit oC H s quy i K3 1 1,03 2 1,06 3 1,09 4 1,12 5 1,15 10 1,31 15 1,51 20 2,0 30 2,3

Bt k tg cc cun dy o c khi xut xng l bao nhiu nu tg o ti hin trng nh hn hoc bng 1 % u c coi l t tiu chun 2. o t s bin i Phi kim tra t s bin i tng u phn p ca cc my bin p. S chnh lnh gia kt qu o v ca nh sn xut phi nh hn 0,5%.

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3. Kim tra cc tnh v th t pha Phi kim tra cc tnh, t u dy v th t pha ca cc my bin p. i vi cc my bin p mt pha, tt c cc cun dy phi c kim tra cc tnh. i vi cc my bin p ba pha, tt c cc cun dy phi c kim tra t u dy v th t pha m bo khng c s khc bit no vi cc thng s ca nh ch to. 4. o in tr mt chiu cun dy in tr cun dy ca cc my bin p phi c o bng dng in mt chiu. S chnh lch gia kt qu o v cc thng s ca nh ch to phi nh hn 2%. 5. o dng khng ti v tn tht c ti Dng khng ti v tn tht c ti phi c kim tra m bo nh cc thng s ca nh ch to. 6. Kim tra du cch in Cc c tnh cch in ca du cch in my bin p phi c kim tra trc v sau khi du m bo cc c tnh ph hp vi tiu chun trong bng 2-23-6. Bng 2-23-6 c tnh cch in ca du cch in my bin p bn in mi 500kV Ln hn 70kV/2,5mm Ln hn 60kV/2,5mm Ln hn 45kV/2,5mm Ln hn 35kV/2,5mm Ln hn 30kV/2,5mm Nh hn 10ppm. m trong du Kh trong du Nh hn 0,5% th tch Nh hn 1,0% th tch Tng lng axit in tr sut

110 220kV Nh hn 110kV 15 35kV Nh hn 15kV 7. Kim tra kn du

Nh hn 0,02mgKOH/g

Nh hn 11012.cm ti 50 )

Nh hn 2,0% th tch

Phi kim tra kn du sao cho khng c du r r di cc iu kin sau y: p lc: ln hn 0,02 Mpa Thi gian chu p lc: ln hn 24 gi 8. Kim tra b iu p di ti (1) Kim tra thao tc chuyn mch Phi kim tra B iu p di ti (OLTC) c th chuyn mch m khng cn bt c tc ng bt thng c bng tay ln bng iu khin in. (2) o dng iu khin ng c in Phi o dng ca mt in sao cho OLTC ng ngt chuyn mch nh nhng khng cn bt c tc ng bt thng ln c cu truyn ng in. Tr s dng o c phi m bo nm trong khong dung sai cho php theo tiu chun ca nh ch to. (3) Kim tra th vng v nc ch th trn OLTC, trn b truyn ng v ti bng iu khin phi ging nhau 9. Kim tra bin dng (CT) s xuyn Phi tin hnh kim tra My bin dng kiu s xuyn ph hp vi cc hng mc kim tra quy nh c th trong iu 29. 10. Kim tra h thng lm mt

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Phi kim tra cc h thng lm mt ca my bin p m bo cc bm v qut vn hnh bnh thng. Phi o v kim tra dng in ca h thng lm mt m bo cc thng s k thut ca nh sn xut. Kim tra chiu quay ca ng c. 11. Kim tra silicagen Silicagen c s dng lm gim m trong du my bin p, phi c kim tra xem c b i mu khng. iu 28. Cc hng mc kim tra my bin in p (PT) 1. o in tr cch in (1) o in tr cch in ca cc cun dy s cp Cc in tr cch in gia cun dy vi t, v gia cc cun dy phi c o bng mgm met c in p 1.000 V. Cc tiu chun i vi cc in tr theo tng loi c quy nh nh sau:

a) Loi cun dy Bng 2-24-1 Cc tiu chun cch in cho cc cun dy ca PTNhit du in p danh nh (kV) Cao hn 66 2035 1015 Thp hn 10 1200 1000 800 400 600 500 400 200 300 250 200 100 150 125 100 50

(M)

200C

300C

400C

500C

600C

75 65 50 25

b) Loi t in v loi cun dy cch in kh in tr cch in ca cc cun dy s cp phi ln hn 50M. c) Loi cch in bng kh SF6 in tr cch in ca cc cun dy s cp phi khng thp hn cc c tnh ca nh sn xut. (2) o cc in tr cch in ca mch th cp v mch iu khin Cc in tr cch in gia cc mch th cp v mch iu khin vi t phi c o bng mgmmet c in p 500V m bo rng cc gi tr ln hn 2M. 2. o t s bin i Phi o t s bin i i vi tng cc ca cc my bin in p. Cc php o phi c thc hin i vi cc my bin in p ang kt ni vi cc bng iu khin. Bng cch t in p th nghim vo mch s cp ca my bin in p, phi o in p ca mch th cp ti im kim tra u vo trn bng iu khin khng nh chc chn v t s bin i v dy ni l thch hp. 3 Kim tra cc tnh Phi kim tra cc tnh ca my bin in p. Mch s cp ca cc my bin in p phi c kt ni vi thit b o v sau phi kim tra cc tnh ca mch th cp. iu 29. Cc hng mc kim tra my bin dng in (CT) 1. o in tr cch in (1) o in tr cch in ca cc cun dy s cp Cc in tr cch in gia cun dy v t, v gia cc cun dy phi c o bng mgmmet c in p 1000 V. Cc tiu chun i vi cc in tr theo loi CT c quy nh nh sau. a) Kiu s Bng 2-25-1 Tiu chun in tr cch in i CT kiu s (M)

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Nhit du in p p p danh nh (kV) Cao hn 66 2035 1015 Thp hn 10 b) Kiu s xuyn Khng cn thit phi o in tr cch in ca cc cun dy. (2) Cc in tr cch in ca cc mch th cp v mch iu khin Cc in tr cch in ca cc mch th cp v mch iu khin phi c o bng mgmmet c in p 500V. in tr phi khng thp hn 2M. (3) o tg Tn hao in mi (tg) phi c o cho my bin dng lm vic vi in p 110 kV hoc ln hn. Gi tr tg o c ti nhit 200C khng c vt qu cc gi tr quy nh nh Bng 2-25-2. Bng 2-25-2 Tiu chun i vi tg ca CT Hng mc kim tra Gi tr tn tht in mi tg% ti in p danh nh (kV) 35 My bin dng c du (cch in giy du) 2. o t s bin i Phi o t s bin i i vi tng u ni ca cc my bin dng. Cc php o phi c thc hin i vi cc my bin dng ang kt ni vi cc bng iu khin. Bng cch t dng in th nghim vo mch s cp ca my bin dng, phi o in pca mch th cp ti cc kim tra trn bng iu khin khng nh chc chn v t s bin i v dy ni l thch hp. 3. o cc tnh Phi kim tra cc tnh ca my bin dng in. Mch s cp ca cc my bin dng phi c kt ni vi thit b o v sau phi kim tra cc tnh ca mch th cp. 4. o c tnh t ha Phi o c tnh t ha ca cc my bin dng pht hin thay i c tnh do s dch chuyn li hoc khe h ca li. Quy nh ny ch p dng cho cc loi my bin dng c loi li tch phn chia. Cc kt qu o c phi c so snh vi cc s liu kim tra nh my ch to m bo khng c s chnh lch. iu 30. Cc hng mc kim tra my ct cch in kh (GCB) 1. o in tr cch in (1) o in tr cch in ca ng dn s cp in tr cch in gia ng dn s cp vi t, v gia cc tip im phi c o bng mgmmet c in p 1000 V m bo cc in tr cch in khng thp hn 1000M. (2) o in tr cch in ca cc mch iu khin in tr cch in ca gia mch iu khin v t phi c o bng mgmmet c in p 500 V m bo cc gi tr khng thp hn 2M. 2. o in tr tip xc tip im bng dng in mt chiu (1) o in tr tip xc i vi mch s cp ca GCB 2,5 110 2 150-220 1,5 1200 1000 800 400 600 500 400 200 300 250 200 100 150 125 100 50 75 65 50 25 20 C0

30 C

0

40 C

0

50 C

0

60 C

0

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Phi o c v kim tra in tr tip xc ca mch s cp m bo cc c tnh k thut ca nh ch to. V nguyn tc, phi tin hnh o i vi tng tip im. Tuy nhin, c th tin hnh o i vi tt c cc tip im trong khi nu khng th o tng tip im ring bit do cu to ca GCB. (2) o in tr tip xc ca tip im ph in tr tip xc ca tip im ph phi c o v kim tra theo ng yu cu k thut ca nh ch to. 3. Kim tra kn ca cc h thng kh nn Ch p dng i vi cc GCB truyn ng bng kh nn. Sau khi b truyn ng c tch y khng kh ti p lc nh mc, phi o c v kim tra s r kh m bo theo yu cu k thut ca nh ch to hoc thp hn 3% trong 12 gi. 4. Kim tra r r ca h thng du p lc iu ny ch p dng i vi cc GCB c cc c ch truyn ng bng du p lc Phi o c v kim tra thi gian r r ca h thng p lc du, m bo cc thng s k thut ca nh sn xut. Thi gian r r l thi gian t lc khi ng li bm do r du ti khi bm dng do tr s p sut du c ci t dng bm du. 5. Kim tra ng h o mt kh hoc ng h o p lc kh Phi o v kim tra cc p sut sau y tho mn yu cu k thut ca nh ch to: - p sut kh SF6 cnh bo v kho s vn hnh ca GCB. - p sut kh SF6 cnh bo v kho s vn hnh ca GCB c ci t li. 6. Phn tch kh SF6 Ch c phn tch kh SF6 trong GCB sau mt ngy tnh t khi kh c np y. m ca SF6 i vi tng ngn kh phi c o c v kim tra, m bo khng qu cc thng s k thut ca nh sn xut. 7. Kim tra vn hnh ng ct (1) Vn hnh ng ct bng tay Phi m bo rng khng c bt thng no trong GCB khi ng ct ba ln bng tay thao tc hoc n nt ti hin trng. (2) Kim tra vn hnh ct v ng Phi m bo rng khng c bt thng no trong GCB khi ng ct ba ln ti in p (p sut) nh mc. (3) Kim tra c ch t ng ct s c Phi m bo rng GCB c ct ngay lp tc v khng ng li khi c tn hiu ct s c trong sut qu trnh pht lnh ng. Sau , phi m bo rng GCB c th ng khi c lnh ng v lnh ct cng c gi n. iu ny khng p dng cho cc GCB khng c c ch hy lnh t ng ct. 8. Kim tra c tnh ng ct (1) Thi gian ng v m ca my ct Phi o v kim tra thi gian ng, m ca my ct m bo cc thng s k thut ca nh ch to. (2) Thao tc my ct in p (p sut) ti thiu Khi in p khng t vo mch s cp, phi kim tra kh nng thc hin thao tc my ct in p ca cun dy in t hoc p sut ca kh nn t gi tr nh mc n in p(p sut) ti thiu. Khi , ,. c tnh tc ng-m ca GCB khng nht thit phi tho mn cc c tnh k thut ca nh ch to. Gi tr in p (p sut) thao tc ti thiu theo gi tr nu trong Bng 2-26-1. Bng 2-26-1 in p (p sut) thao tc ti thiu ca GCB Hng mc in p ng ti thiu Tiu ch 75% in p iu khin nh mc

12

in p m ti thiu p lc ng ti thiu (ch p dng cho truyn ng kh p lc) p lc m ti thiu (ch p dng cho truyn ng kh p lc) (3) Ba pha khng ng thi

70% in p iu khin nh mc 85% p sut nh mc 85% p sut nh mc

Thi gian ng v m ba pha khng ng thi phi c o c v kim tra p ng cc quy chun trong Bng 2-26-2. Bng 2-26-2 Tiu chun i vi ba pha khng ng thi ca GCB in p danh nh Nh hn 110kV 110kV v ln hn (4) Thi im tc ng ca cc tip im ph Cc thi im tc ng ca cc tip im ph phi c o c v kim tra p ng cc tiu chun ca thit k. Trong trng hp thit k khng quy nh tiu chun th kim tra p ng cc Tiu chun ca nh ch to. 9. Kim tra my o thi gian thiu pha iu ny ch p dng i vi GCB vn hnh pha c lp. Sau khi mt pha m t trng thi ca ba pha ng, thi gian trc khi hai pha tc ng s c o v kim tra theo h s k thut. 10. Kim tra thng cha du hoc kh thao tc Ch thc hin i vi GCB truyn ng bng cht kh hoc du p lc. Cn khng nh l GCB c th ng m lin tc (hn 2 ln trong trng hp ng lp li) khi thng cha khng ni vi ngun (c p lc kh hoc ngun cp). 11. Kim tra h thng lin ng (1) Kha bng p lc kh SF6 Cn xc nh l h thng GCB khng ng m khi p lc kh thp hn p lc vn hnh ca h thng. (2) Kha bng p lc du Ch p dng vi GCB truyn ng bng du p lc. Cn m bo l GCB khng ng/ m khi p lc du nh hn mc quy nh. (3) Kha bng p lc kh Ch p dng vi GCB truyn ng bng kh p lc. Cn xc nh l GCB khng ng m khi p lc kh nh hn mc quy nh 12. Kim tra vn hnh ca van an ton Ch p dng vi GCB truyn ng bng du hoc kh p lc. Cn m bo l van an ton s hot ng khi p lc du hoc kh sinh ra trong thng vt qu p sut cho php. iu 31. Cc hng mc kim tra h thng cch in kh (GIS) Phi quy nh c th qu trnh kim tra ti hin trng khi lp t GIS. (GIS y khng bao gm GCB). 1. o in tr cch in (1) o in tr cch in ca cc ng dn s cp Phi s dng mgmmet c in p 1000 V o in tr cch in gia ng dn s cp vi t, gia cc pha, cc in tr cch in khng thp hn 1000M. (2) o in tr cch in ca cc mch iu khin in tr gia cc mch iu khin v t phi c o bng mgmmet c in p 500 V m bo rng cc gi tr khng thp hn 2M. 2. o in tr tip xc bng dng in mt chiu Tiu chun nh hn 0,006 giy. nh hn 0,004 giy.

13

(1) o in tr tip xc ca mch s cp ca GIS Phi o c v kim tra cc in tr tip xc ca mch s cp m bm cc thng s k thut ca nh ch to. V nguyn tc, phi tin hnh o i vi tng tip im. Tuy nhin, trong trng hp khng th o cc tng tip im c lp do cu to ca GIS, c th thc hin o tt c tip im trong mt mch. (2) o in tr tip xc ca tip im ph in tr tip xc ca tip im ph phi c o v kim tra theo ng yu cu k thut ca nh ch to. 3. Kim tra kn ca h thng kh nn iu ny ch p dng i vi cc GIS c c ch truyn ng bng kh nn. Phi o, kim tra m bo r kh theo quy nh ca nh ch to hoc nh hn 3% sau 12 gi k t khi c ch truyn ng c np kh ti p sut nh mc. 4. Kim tra thit b d mt kh Phi o v kim tra p sut sau y theo ng yu cu k thut ca nh ch to: - p sut kh SF6 khi my d khi ng cnh bo v kho vn hnh GCB. - p sut kh SF6 khi cnh bo v kho vn hnh GCB c ci t li. 5. Phn tch kh SF6 Ch phn tch kh SF6 t nht mt ngy sau khi np kh. Phi o, kim tra m kh SF6 i vi tng ngn kh m bo thng s k thut ca nh ch to. 6. Kim tra vn hnh ng m dao cch ly (1) Kim tra ng m bng tay Phi kim tra chc chn khng c s bt thng no trong dao cch ly bng cch m v ng ba ln bng tay thao tc hoc nt bm ti hin trng. (2) Kim tra vn hnh ng m Phi kim tra chc chn khng c s bt thng no trong dao cch ly bng cch m v ng ba ln ti in p (p sut) nh mc bng iu khin t xa. 7. Kim tra cc thit b chng st Phi tin hnh kim tra cc thit b chng st theo cc mc kim tra c quy nh ring trong iu 38. 8. Kim tra bin in p (PT) Phi tin hnh kim tra PT theo cc mc kim tra c quy nh ring trong iu 28 9. Kim tra bin dng in (CT) Phi tin hnh kim tra bin dng in theo cc mc kim tra c quy nh ring trong iu 29. 10. Kim tra trnh t hot ng v kha lin ng Phi kim tra cc mch iu khin ca nhng bng iu khin GIS. (1) Kim tra trnh t hot ng ca bng iu khin GIS Phi tin hnh cc kim tra kho lin ng m bo cc mch iu khin ph hp vi cc thng s k thut ca nh ch to (2) Kim tra kho lin ng ca bng iu khin GIS Phi tin hnh kim tra ring bit kha lin ng i vi GIS m bo cc kha in v c kh ph hp vi cc thng s trong h s k thut. 11. Kim tra pha Phi thc hin kim tra i vi tng u ra ca GIS m bo cc lin kt mch s cp ph hp vi thit k v ng v pha vi li lin kt. iu 32. Cc hng mc kim tra my ct in chn khng (VCB) 1. o in tr cch in

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(1) o in tr cch in ca cc ng dn in s cp Phi s dng mgmmet c in p 1000 V o in tr cch in gia s cp vi t, gia cc pha v gi tr in tr cch in phi khng thp hn 1000M. (2) in tr cch in ca cc mch iu khin in tr cch in ca mch iu khin v t phi c o bng ng h o in tr c in p 500V, gi tr in tr cch in khng thp hn 2M. 2. Kim tra vn hnh ng ct (1) Kim tra ng ct bng tay Phi kim tra chc chn rng khng c s bt thng no trong VCB bng cch ng ct ba ln bng tay thao tc hoc nt bm ti hin trng. (2) Kim tra vn hnh ng ct Phi kim tra chc chn rng khng c s bt thng no trong VCB bng cch ng ct ba ln ti in p nh mc bng iu khin t xa. (3) Kim tra c ch t ng ngt Phi xc nhn rng VCB c m ngay lp tc v khng b ng li nu lnh ct c a ra trong qu trnh tc ng ng my ct. Sau , phi xc nhn rng VCB c th ng tr li nu c lnh ng v ct c hu b. iu ny khng p dng cho cc VCB khng c c ch hy lnh t ng ct. 3. o cc thng s k thut ng m (1) Thi gian ng m tip im Phi o c, kim tra thi gian ng m tip im, m bo cc thng s k thut ca nh ch to. (2) in p vn hnh ti thiu Khi khng t in p vo mch s cp, phi thay i in p ca cun dy in t v o in p nh nht khi VCB hon thnh qu trnh ng ct. Khi , c tnh tc ng- ct ca VCB khng cn tho mn c tnh k thut ca nh ch to.Phi kim tra m bo rng gi tr in p ng ct nh nht o c khng vt qu gi tr trong bng di y. Phi o, kim tra in p ng ct ti thiu p ng c cc tiu chun trong Bng 2-28-1 sau y. Bng 2-28-1 in p ti thiu ca VCB Hng mc in p ng ti thiu in p ct ti thiu (3) Khng ng thi ba pha Phi o, kim tra thi gian ng m khng ng thi ba pha m bo tho mn theo thit k hoc cc tiu chun nu trong Bng 2-28-2 sau y: Bng 2-28-2 Tiu chun khng ng thi ba pha ca VCB in p danh nh Nh hn 110kV Ln hn hoc bng 110kV (4) Thi im tc ng ca cc tip im ph Cc thi im tc ng ca cc tip im ph phi c o v kim tra p ng cc tiu chun ca nh ch to. iu 33. Cc hng mc kim tra my ct in du (OCB) 1. o in tr cch in (1) in tr cch in ca cc ng dn in s cp Tiu chun Nh hn 0,006sec. Nh hn 0,004sec. Tiu chun 75% in p iu khin nh mc 70% in p iu khin nh mc

15

in tr cch in gia ng dn s cp vi t, v gia cc pha phi c o bng mgmmet in p 1000V, gi tr in tr cch in l khng thp hn 1000M. (2) in tr cch in ca cc mch in iu khin in tr cch in gia mch iu khin vi t phi c o bng mgmmet in p 500V, gi tr in tr cch in khng thp hn 2M. 2. in tr tip xc bng dng in mt chiu (1) in tr tip im chnh (s cp) OCB Phi o, kim tra cc in tr tip im s cp OCB m bo cc thng s k thut ca nh ch to. Phi o tng pha. (2) in tr tip im ph Phi o, kim tra cc in tr tip xc ca tip im ph, m bo cc thng s k thut ca nh ch to. 3. Kim tra vn hnh ng ct (1)Kim tra vn hnh ng ct bng tay Phi kim tra chc chn khng c bt thng trong OCB bng cch ct v ng ba ln bng tay thao tc hoc nt bm ti hin trng. (2) Kim tra vn hnh ng ct Phi kim tra chc chn khng c bt thng trong OCB bng cch ct v ng ba ln in p (p sut) nh mc bng iu khin t xa. (3) C ch t ng ct Phi kim tra chc chn OCB ct ngay lp tc v khng ng tr li nu lnh ct c a ra trong qu trnh ng my ct. m bo OCB c th ng tr li khi nhn ng thi lnh ng v ct b hu b. Cc OCB khng c c ch t ct khng cn lm 4. Xc nh thng s ng ct (1) Thi gian ng v m tip im, v tc ng - ct Phi o thi gian ng m tip im i vi OCB cho tt c cc cp in p. Phi o tc ng m cho tt c OCB cao hn 35 kV. C hai php o phi c kim tra, m bo cc thng s k thut ca nh ch to. (2) in p (p sut) vn hnh ti thiu Trong trng hp khi khng t in p vo mch s cp, c in p ca cun dy in t (hay p sut ca kh nn) phi c duy tr ti gi tr nh mc v in p (hay p sut) ti thiu khi OCB hon tt thao tc phi c o bng cch thay i thng s (p sut hoc in p). Lc ny, c tnh tc ng-m ca OCB khng nht thit phi tho mn cc c tnh k thut ca nh ch to. Phi kim tra cc gi tr o ca in p vn hnh ti thiu (p sut) khng vt qu gi tr nu trong Bng 2-29-1 Bng 2-29-1 Ch tiu in p (p sut) vn hnh ti thiu ca OCB Hng mc in p ng ti thiu in p m ti thiu p sut ng ti thiu (ch cho ng c kh nn) p sut m ti thiu (ch cho ng c kh nn) Ch tiu 75% ca in p iu khin nh mc 70% ca in p iu khin nh mc 85% ca p sut nh mc 85% ca p sut nh mc

(3) Thi gian ng v m khng ng thi ba pha phi c o v kim tra m bo tho mn cc tiu chun nu trong Bng 2-29-2. Bng 2-29-2 Tiu chun khng ng thi ba pha ca OCB in p thng Ch tiu

16

Nh hn 110kV Ln hn hoc bng 110kV (4) Thi im tc ng ca cc tip im ph

Nh hn 0,006sec. Nh hn 0,004sec.

Cc thi im tc ng ca cc tip im ph phi c o c v kim tra p ng cc tiu chun thit k. Trong trng hp thit k khng quy nh tiu chun th kim tra p ng cc tiu chun ca nh ch to. 5. Kim tra du cch in Phi kim tra du cch in trc khi v sau khi vo OCB..Cc ni dung kim tra phi ph hp vi quy nh i vi du my bin p. 6. Kim tra my bin dng in kiu s xuyn Bin dng kiu s xuyn phi ph hp ng cc mc kim tra bin dng in xc nh theo iu 29. iu 34. Cc hng mc kim tra dao cch ly 1. o in tr cch in (1) o in tr cch in ca phn dn in s cp in tr cch in gia phn dn in s cp vi t, gia cc cc cn c o bng mgmet 1000V kim tra gi tr in tr cch in khng thp hn 1000M. (2) o in tr cch in cc mch iu khin Phi o in tr cch in gia cc mch iu khin vi t bng mgmmet c in p 500V, gi tr in tr cch in o c khng thp hn 2M. 2. o in tr tip xc bng dng in mt chiu in tr tip xc ca cc tip im mch s cp cn c o v kim tra c p ng cc yu cu k thut ca nh ch to. 3. Kim tra thao tc ng ct (1) Kim tra thao tc ng ct bng tay Phi kim tra chc chn rng khng c s bt thng no trong dao cch ly bng cch ng ct ba ln bng tay thao tc hoc nt bm ti ch. (2) Kim tra thao tc ng m t xa Phi kim tra chc chn rng khng c s bt thng no trong dao cch ly bng cch ct v ng ba ln ti in p (p sut) nh mc bng iu khin t xa. 4. Thi im tc ng ca cc tip im ph Cc thi im tc ng ca cc tip im ph phi c o v kim tra p ng cc tiu chun ca thit k. Trong trng hp thit k khng quy nh tiu chun th kim tra theo tiu chun ca nh ch to. 5. Kim tra kha lin ng Kha lin ng gia li chnh ca dao cch ly v li ca dao ni t cn c kim tra m bo kha lin ng hot ng theo yu cu k thut ca nh ch to. iu 35. Cc hng mc kim tra my nn kh 1. Kim tra ng h o p sut Cn kim tra chnh xc ca cc ng h o p sut p ng cc yu cu k thut ca nh sn xut. 2. Kim tra van an ton Cn m bo cc van an ton tc ng khi p sut kh hay p sut du tng ti mc p sut cho php ti a ca bnh cha. 3. Kim tra khi ng v dng t ng Cn m bo cc my nn s khi ng t ng ti p sut khi ng v dng hot ng ti p sut dng.

17

iu 36. Cc hng mc kim tra t bng in 1. o in tr cch in Cn o in tr cch in ca cc t phn phi (1) o in tr cch in ca cc mch chnh in tr cch in cn c o bng mgmmet 1000V. Cc tiu chun in tr cch in nh sau: a) i vi tng thit b in tr cch in ca tng thit b phi khng thp hn 1000M. b) i vi tng cc thit b in tr cch in ca tng cc thit b phi khng thp hn

10in p danh nh (V) N (s lng cc s cch in)x1,000(2) o in tr cch in ca cc mch iu khin

(M).

Phi o in tr cch in gia cc mch iu khin vi t bng mgmmet 500V m bo cc gi tr o khng thp hn 2M. 2. Kim tra lin ng v kim tra kho lin ng Cc mch iu khin ca t phn phi cn c kim tra. (1) Kim tra trnh t lin ng ca cc bng mch iu khin ca t phn phi Kim tra lin ng cn c thc hin m bo cc mch iu khin ny tun theo cc yu cu k thut ca nh sn xut. (2) Kim tra kho lin ng ca cc bng mch iu khin ca t phn phi Kim tra kho lin ng cn c thc hin m bo c kho lin ng in v c tun theo cc yu cu k thut ca nh sn xut. 3. Kim tra pha Kim tra pha cn c thc hin i vi cc t phn phi m bo kt ni mch s cp v th cp tun theo cc yu cu k thut ca nh sn xut v thit k. iu 37. Cc hng mc kim tra t cng sut 1. in tr cch in Cc in tr cch in ca cc t cng sut cn c o. (1) o in tr cch in ca mch chnh in tr cch in phi c o bng mgmet 1000V. Gi tr in tr phi khng thp hn 1000M. (2) o in tr cch in ca mch iu khin Phi o in tr cch in gia cc mch iu khin vi t bng mgmet 500V m bo gi tr o khng thp hn 2M. 2. Kim tra s thng mch ca in tr phng Kim tra s thng mch ti cc u cui ca in tr phng c o bng mt thit b kim tra mch. 3. Kim tra trnh t hot ng Kim tra trnh t hot ng cc mch iu khin (nh mch cnh bo) m bo tun theo cc yu cu ca nh sn xut. iu 38. Cc hng mc kim tra thit b chng st 1. o in tr cch in Phi o in tr cch in ca chng st van. (1) o in tr cch in ca mch chnh

18

Phi o in tr cch in bng mgmmet 1000V. Cc in tr ny khng thp hn 1000M. (2) o in tr cch in ca phn cch in Phi o in tr cch in ca phn cch in bng mgmmet 500V theo iu kin cc u thit b dng r c tho ra. in tr ny khng thp hn 2M. iu 39. Cc hng mc kim tra c quy 1. o in p Phi kim tra in p ca mi phn t c quy. Mc in p ca phn t c quy cn kit khng chch nhiu hn 1~1,5% so vi in p trung bnh ca cc phn t c quy cn li. S lng cc phn t c quy cn kit khng vt qu 5% tng s phn t c quy. Di in p cho php ca mi phn t c quy theo Bng 2-35-1. Bng 2-35-1 Di in p cho php i vi phn t c quy in p np (V) Di cho php (V) 2. Kim tra np cn bng Kim tra np cn bng cn c thc hin hiu chnh in p khng cn bng v t trng v ng nht cc lp trn v ln di ca cc cht in phn. Th tc kim tra cn tun theo cc yu cu k thut ca nh sn xut. iu 40. Cc hng mc kim tra thit b rle bo v v iu khin 1. Th nghim n chic i vi cc ng h o v rle bo v phi thc hnh cc th nghim chc nng v c tnh, v kim tra tr s chnh nh rle bo v. Khi thc hnh th nghim n chic ny, phi tch hon ton cc mch ng ct ca rle bo v, mch my bin dng in v mch my bin in p. - Kim tra sai s ng h o - Kim tra im tc ng rle bo v - Kim tra c tnh in p v dng in - Kim tra c tnh gc pha - o thi gian tc ng 2. Th nghim mch mt chiu i vi mch mt chiu phi thc hnh cc th nghim nh sau: - Kim tra trnh t tc ng trong mch mt chiu - o in tr cch in - o cng sut mang ti 3. Th nghim mch xoay chiu (1) Th nghim mch th cp - o in tr cch in: ng in mch xoay chiu trong bng iu khin (mch my bin dng in v mch my bin in p) v kim tra - Hot ng ca ng h o v rle bo v - o cng sut mang ti - Trnh t tc ng trong mch xoay chiu (2) Th nghim mch xoay chiu (Th nghim m phng) Phi xc nhn c tnh hot ng ca rle bo v khi to s c m phng bng cch thay i nhanh mc dng in xoay chiu hoc dng in mt chiu t vo. V phi kim tra hot ng ca thit b thao tc t ng thng qua th nghim m phng v cc loi hot ng. 2,15; 2,18 0,05 2,26; 2,30; 2,34 0,10 2,40; 2,45; 2,50 0,15

19

- Kim tra s c m phng - Kim tra thao tc m phng 4. Th nghim ghp ni i vi cc thit b c lp t ti nhiu trm bin p c lin kt thng tin vi nhau, phi thc hnh th nghim vn hnh tng hp k c knh truyn thng tin. 5. Th nghim mch tng hp (1) o in tr cch in Phi o in tr cch in tng hp ca c thit b chnh ln thit b lin quan c ni qua cp iu khin k c phn u kp. (2) Kim tra thao tc ng ct Phi kim tra tn hiu ng ct c ch th h thng iu khin ng theo thit b ng ct hot ng m khng gy ra hin tng bt thng no. (3) Kim tra kha lin ng Phi kim tra thit b ng ct hot ng theo ng iu kin kha lin ng. (4) Kim tra thit b rle bo v v kim tra tn hiu cnh bo Phi kim tra thit b rle bo v v thit b iu khin c u ni ng vi thit b s cp, v phi kim tra tc ng ca tn hiu v cnh bo v s c ph hp vi tc ng ca thit b rle bo v hoc thit b iu khin. 6. Th nghim tng hp mch my bin in p (1) o in tr cch in Phi kim tra cch in ca cp iu khin v bng iu khin c cch in (khng c ngn mch v chm t) vi iu kin mch ni t c tch ra. (2) Kim tra cc tnh Phi kim tra cc mch th cp ca my bin in p c ni vi cp iu khin ng theo thit k. (3) Kim tra t s bin i t in p trn mch s cp ca my bin in p, o in p v gc pha ti u kp th nghim trn bng iu khin ni vi mch th cp kim tra t s bin i v cch ni gia my bin in p v bng iu khin l ng. (4) o cng sut mang ti Phi o cng sut mang ti tng hp bao gm bng iu khin v cp iu khin bng cch t in p nh mc ln mch th cp ca my bin in p ng theo tr s thit k. (5) Kim tra hot ng ng thi. Trong trng hp thc hnh kim tra t s bin i ca nhiu my bin in p ng thi, phi kim tra cc mch th cp ca tng my bin in p c ni ng vi bng iu khin bng cch ln lt thao tc ct cu dao hoc aptomt 7. Th nghim tng th mch my bin dng in (1) o in tr cch in Phi kim tra mch tng th cp iu khin v bng iu khin c cch in (khng c ngn mch v chm t) vi iu kin mch ni t c tch ra. (2) Kim tra cc tnh Phi kim tra cc mch th cp ca my bin dng in c ni vi cp iu khin ng theo thit k. (3) Kim tra t s bin i t dng in vo mch s cp ca my bin dng in, o dng in v gc pha ti u kp th trn bng iu khin c ni vi mch th cp kim tra t s bin i v cch ni gia my bin dng in v bng iu khin l ng. (4) o cng sut mang ti

20

Phi o cng sut mang ti tng hp bao gm bng iu khin v cp iu khin khi a dng in nh mc (5A hoc 1A) vo mch th cp ca my bin dng in kim tra cng sut mang ti tng hp ng theo tr s thit k. (5) Kim tra u ni Trong khi thc hnh kim tra t s bin i mch th cp ca my bin dng in c ngn mch ti u kp pha my bin dng in, cho dng in vo mch s cp ca my bin dng in v phi xc nhn ch th ca ampek trn bng iu khin gim v khng, kim tra u ni my bin dng Chng 5

KIM TRA HON THNHMc 1. Quy nh chung iu 41. Quy nh chung Kim tra hon thnh phi c thc hin khi hon thnh cng vic lp t xc nhn cht lng ca cng trnh trc khi bt u vn hnh trong iu kin mi thit b c kt ni trong ton b h thng. Phi tin hnh ring bit vi trm bin p, ng dy trn khng v cp ngm. Ch s hu ca cng trnh phi gim st vic kim tra. Mc 2. ng dy trn khng iu 42. o in tr cch in Cn kim tra m bo ng dy c cch in tt bng cch o in tr cch in ca: pha vi t; v pha vi pha. Cc tiu ch cch in cho php o ny nh sau: 1. Khng nh hn 4 [M] pha so vi t; 2. Khng nh hn 8 [M] pha so vi pha. iu 43. Kim tra Pha Phi kim tra th t v ng v pha ca ng dy. iu 44. Kim tra in p chu ng tn s cng nghip Cn kim tra cch in ca ng dy bng cch t in p lm vic thng thng trong thi gian 10 pht. Mc 3. ng dy cp ngm iu 45. Kim tra bng mt (kim tra tuyn) Cn kim tra cng trnh xy dng c hon thnh tun theo ng cc yu cu thit k k thut v cc quy chun k thut. Cc hng mc sau cn c kim tra bng mt (nhng phn thy c) xem c tun theo ng cc yu cu thit k k thut khng: - S lng v phng php lp t cp - V tr cc u cp - Cc iu kin v cp, hp u cp v hp ni cp, cc iu kin ca dy ni t. iu 46. in tr cch in Cn kim tra mi li cp c cch in vi t (v vi cc li khc vi trng hp cp nhiu li tr trng hp cc loi cp c bc kn). Php o thng c thc hin bng mgmmet quy nh trong quy chun IEC 61557-1: "An ton in trong cc h thng phn phi h p ti 1000 V A.C. v 1500 V D.C.- Thit b kim tra, o lng hay gim st cc bin php bo v" sau thi gian 1 pht t in p kim tra. Nu cp qu di th dung khng ca cp ln qu mc s khin cho kim ch th ca my o khng n nh trong khong thi gian ngn, ch c c khi kim n nh.in tr cch in cn m bo theo cc tiu chun k thut iu 47. Kim tra pha Phi kim tra theo cc th tc c m t trong iu 19. iu 48. Kim tra bn in mi ip p kim tra c quy nh theo Ph lc ca Tp ny trong 10 pht khi cp c hp ni.

21

Khng cn kim tra bn in mi khi cp c chng ch xut xng v khng c hp ni Php kim tra mang in p lm vic vi t thng thng s khng c php thay th kim tra bn in mi c cp trn. Trong trng hp dng in p mt chiu kim tra, in p mt chiu ny s phi ln gp i in p kim tra xoay chiu tng ng. iu 49. Khong cch gia phn mang in vi hng ro, tng chn Phi kim tra m bo khong cch gia phn mang in vi hng ro hay tng chn tho mn cc yu cu c quy nh trong Mc 3 iu 50. Mc 4. Thit b trm bin p iu 50. Kim tra bng mt 1. Trng thi lp t ca thit b c th to ra h quang in Cn kim tra khong cch an ton gia cc thit b c th pht sinh h quang in nh my ct v dao cch ly vi cc vt d bt la 2. Kim tra trng thi lp t ca phn mang in Cn kim tra khong cch an ton cc phn c mang in (ngoi tr thit b kn c ni t, v d GIS). y, phn c mang in gm c b s cch in khng c vy chn bng hng ro. Cc khong cch cch in gia phn mang in vi hng ro, tng phi tho mn cc quy nh trong QT-2006 3. Kim tra hng ro, tng Cn kim tra trm bin p c vy chn bng hng ro, tng v c trang b kho sao cho nhng ngi khng c thm quyn khng th vo sn ca trm bin p. Chiu cao ca hng ro, tng cn c kim tra khng thp hn 1,8 [m]. Cc khong cch cch in gia phn mang in vi hng ro, tng phi tho mn cc quy nh trong QT-2006 iu 51. o in tr ni t in tr ni t ca trm bin th cn c o v kim tra khng vt qu gi tr quy nh QT2006 iu 52. Kim tra h thng gim st v iu khin 1. Kim tra ng ct Khi thao tc my ct v dao cch ly t phng iu khin, cn kim tra rng mi thit b lm vic thch hp v nhng tn hiu ch th trong phng iu khin thay i tng ng. Ngoi ra, cng cn kim tra b phn ch th chuyn mch ca cc thit b xem c lm vic ng hay cha. 2. Kim tra b iu chnh in p di ti my bin p Bng cch a lnh thay i iu chnh nc t phng iu khin ti my bin p, cn kim tra b iu chnh in p di ti c thay i nc tng ng vi lnh a ra hay khng. 3. Kim tra thit b bo v, kim tra ch th cnh bo Bng cch kch hot cng bc r le vi mi thit b bo v hay thit b cnh bo, cn kim tra hot ng ca cc thit b c lin quan v cc tn hiu ch th trong phng iu khin hot ng theo ng nh s thit k. 4. Kim tra rle bo v v thit b iu khin mang ti thc Khi kim tra cui cng, bng in p v dng in ca h thng in thc, cn tin hnh cc th nghim sau y: - Kim tra in p v th t pha - o in p, dng in v gc pha - Kim tra hng - o dng in v in p d - Kim tra dng in khng cn bng ca mch so lch

22

iu 53. Kim tra kha lin ng Cn kim tra kho lin ng gia my ct v dao cch ly lin quan m bo rng i tng ca kha lin ng hot ng ng nh m t trong yu cu k thut ca nh sn xut v thit k. iu 54. Kim tra bn in mi bn in mi ca tng thit b cn c kim tra bng cch t in p kim tra nh trong Ph lc trong thi gian 10 pht iu 55. Kim tra s hot ng tng hp ton h thng Nhm kim tra n nh ca GCB, GIS cn t in p h thng trong thi gian 72 [gi] thc hin nhng kim tra sau: 1. o phn b nhit Cn kim tra m bo khng c qu nhit ni b bt thng tn ti bng cch o phn b nhit trn b mt, ti u ra ca GCB, GIS. 2. o kh phn r kh SF6 Hm lng kh SO2 khng vt qu 2 [ppm] iu 56. o n v rung Mc n v rung vng bin ngoi khu vc trm bin p cn c kim tra khng vt qu cc tiu chun cho php theo quy nh hin hnh. Chng 6

KIM TRA NH KMc 1. Quy nh chung iu 57. Quy nh chung Vic kim tra ny phi c thc hin nh k bng mt v o lng nu cn thit, duy tr s lm vic bnh thng ng thi ngn chn cc ri ro c th xy ra vi li in. iu 58. Tn sut ca kim tra nh k Tn sut kim tra phi c n nh theo quyt nh ca ngi c trch nhim qun l thit b, nhng chu k ngn nht phi c gii hn trong vng ba nm. Vic ko di hay rt ngn chu k kim tra phi c xem xt v n nh bi ngi c trch nhim qun l thit b da trn biu cc s c thc xy ra vi thit b. Chu k kim tra ny phi c quyt nh bi ngi c trch nhim qun l thit b. Mc 2. ng dy trn khng iu 59. Cc hng mc kim tra Hng mc v ni dng kim tra nh k c trnh by trong bng sau. Bng 2-55-1 Hng mc kim tra nh k ca ung dy trn khng Hng mc kim tra Thn ct thp Cc ni dung kim tra Cn kim tra khng c bt thng no, v d nh s thay i hnh dng, nt gy, g, cu kin ca ct thp, bng cch quan st t mt t. Cng cn kim tra xem bulng hay vt c b ri, lng, g khng. Cn kim tra khng c bt thng no, v d nh nt gy v h hng, trn thn ct b tng. Cng cn kim tra thn ct b tng khng b nghing t mt t. Cn kim tra khng c nhng bt thng, v d nh h hng b tng mng, b xi l/vi lp do xt t ct Cn kim tra khng c nhng bt thng ca dy no, nh chng dy, g, t st cp. Cn kim tra khng c nhng bt thng, nh g, h hng v t. o in tr tip t gi tr quy nh cn c m bo. Cn kim tra khng c nhng bt thng , nh nt gy, vt g ng

Ct b tng

Mng Dy no Thit b ni t S cch in

23

Hng mc kim tra

Cc ni dung kim tra k trn phn cch in, du vt ng k v h quang in trn phn cch in, g trn u chm v cht. Cn kim tra khng c ting n bt thng nh ting n do r in.

Dy dn in, Dy tip t

Cn kim tra khng c nhng bt thng, nh h hng, chy dy, t si, xon dy v lng dy. Cng cn kim tra dy lo c gi tch bit vi khong cch thch hp so vi thn ct in bng cch kim tra trng thi thay i hnh dng ca dy lo v nghing ca chui cch in. Cn kim tra khng c nhng bt thng ng k, nh nt gy, thay i hnh dng bt thng, g trong ph kin. Vi ng dy c lp t vnh ng th, m phng in cng cn kim tra khng c nhng bt thng nh h hng v g trn vnh ng th v m phng in Cn kim tra khng c nhng bt thng, nh g v gy ca li chn, cc, v.v ca hng ro bo v, hng ro ny c xy dng ngn chn s thm nhp ca ngi vo cc trang thit b ca ng dy. Cn kim tra khng c nhng bt thng nh mt, lng, g, v tr b dch chuyn v gy dy.

Ph kin ng dy trn khng

Hng ro, li bo v

B chng rung

Mc 3. ng dy cp ngm iu 60. Cc hng mc kim tra cp ngm Phi kim tra khng nh rng khng c bt thng nh tnh trng ph kin khng ph hp, nt v, thay i hnh dng, n mn, phn c nh b lng, r r du (i vi cp OF), hng hc thit b lin quan, tng i tng ca qu trnh kim tra c nu trong bng di y. Bng 2-56-1 Hng mc kim tra i vi cp i tng kim tra (1) Cp (Bao gm c phn cp (1) ch gp khc) (2) (3) (4) (5) (2) u ng R du Nt, gin n, thay i hnh dng Tnh trng cong ca cp Thay i hnh dng ca cp ch gp khc Khong cch vi cc cp khc Ni dung kim tra

(1) Tnh trng ca thit b ngn nc (2) Nt, r (3) Tnh trng lp t (4) R nc

(3) Gi cp v phn ph (1) Nt, r tr (2) Bulng, ai c b lng (3) Tnh trng lp t (4) Ging v cng xon (1) Nt, r v tnh trng ca vt liu lm m (2) Bulng, ai c b lng (5) Phn ph tr v cch in (1) Nt, g cho cp (2) V tr lp t, tnh trng lp t (3) Bulng, ai c b lng (6) ng bo v (1) Nt, r, v, thay i hnh dng (2) Bulng, ai c b lng

24

i tng kim tra (7) Dy ni t (1) Khng b t

Ni dung kim tra (2) Dy khng ni t (cc b) (3) R

(8) Vch ngn cc ng vt nh

(1) V, r, thay i hnh dng (2) Tnh trng lp t (3) Bulng, ai c b lng

(9) Bng nhn hiu

(1) Ri (2) Nt, thay i hnh dng (3) Tnh trng lp t

iu 61. Cc hng mc kim tra u cp Phi kim tra m bo khng c bt thng nh trng thi ph kin khng ph hp, nt v, thay i hnh dng, v, phn cng gi c nh b lng, r du (i vi cp OF), hng hc thit b lin quan, tng i tng cn kim tra c nu trong bng di y. Bng 2-57-1 Hng mc kim tra i vi u cp i tng kim tra (1) u cp (bao gm c a kim (1) Lng u ct loi mng gn cng) (2) Nt, v, r (3) Thay i hnh dng (4) (5) (2) V chng nc Bulng lng Ri hoc ri hoc bc mu bng pht hin nhit Ni dung kim tra

(1) Nt, g (2) Thay i hnh dng (3) Tnh trng tt (4) R r hp cht hoc du

(3) S cch in

(1) Bn (2) Nt, v (3) C xut hin du vt h quang (4) R r hp cht hoc du

(4) Ph kin cch in

(1) Bn (2) Nt, v (3) C xut hin du vt h quang

(5) cch in (6) V bo v

(1) Nt (2) o in tr cch in (1) R du (2) Nt, v (3) Thay i hnh dng

(7) Ph kin gn vi GIS

(1) R, thay i hnh dng (2) Bulng ng v tr

25

i tng kim tra (8) Hp ni (1) R du (3) Nt, g (4) Bulng lng

Ni dung kim tra

(9) ng ng hp ni, v bo (1) R du v (2) V, gin n, thay i hnh dng (3) Ri hoc bc mu ca bng chng r (10) Gi (11) u ni v van smi-stop (12) ng cch in (1) Nt, r, tnh trng ca vt liu m (2) Bulng lng (1) R du (2) C np hay khng (1) Bn (2) Nt (3) Thay i hnh dng (13) Cp (Bao gm c phn cp (1) R du ch gp khc) (2) Nt, gin n, thay i hnh dng (3) Tnh trng cong ca cp (4) Kim tra vng (5) Ri hoc bc mu bng hin th pha (14) Thanh ging (15) ng bo v (16) thp (1) Nt, v, r (2) Bulng lng (1) Nt, v, thay i hnh dng, r (1) Thay i hnh dng, v (2) G (3) Bulng lng (17) Ni t (1) Khng b t, (2) Lng tip xc (3) R (18) Bng nhn (1) Ri, Mt, (2) Nt, bc mu (3) Tnh trng lp t (19) Thit b bo v v cp (1) Ri (2) Bulng, ai c lng (3) Tnh trng lp t (4) Pht nng (5) R in iu 62. Cc hng mc kim tra hp ni cp Phi kim tra m bo khng c bt thng nh trng thi ph kin khng ph hp, nt v, thay i hnh dng, mn, phn cng gi c nh b lng, r du (cho cp OF), cc hng hc vi thit b lin quan, tng i tng cn kim tra c nu trong bng di y. Bng 2-58-1 Hng mc kim tra i vi hp ni cp

26

i tng kim tra (1) Hp ni cp

Ni dung kim tra (1) R hp cht hoc du (2) Nt, v, gin n , thay i hnh dng (3) Khim khuyt phn c bo v bng ch (4) (5) (6) (7) (8) Ting ng bt thng, qu nhit Khim khuyt u ni v van semi-stop Tip xc Dch chuyn sch R du Nt, gin n thay i hnh dng Thay i hnh dng ch gp khc Khong cch vi cc cp khc

(2) Cp (Bao gm c phn cp (1) ch gp khc) (2) (3) (4)

(3) Phn gi v cch in cho (1) Nt, G cp (2) V tr lp t, tnh trng lp t (3) Bulng lng (4) Thit b chng vng (5) Kp ni (ch i vi cp OF) (1) Nt, g (2) Tnh trng c nh (1) Nt, g (2) Tnh trng lp t (3) Bulng lng (6) Vt dn (1) Lng, t mt s si (2) t hon ton (3) R (4) Tnh trng ni (7) Dy ni t (1) t mt s si (2) t hon ton (3) R (8) Bng nhn (1) Ri, mt (2) Nt, bc mu (3) Mt ch, tnh trng lp t (9) Thit b bo v cho v cp (1) Ri (2) Tnh trng lp t (3) Bulng, ai c lng (4) Pht nng (5) R in iu 63. Cc hng mc kim tra thit b cp du Phi kim tra khng nh rng khng c bt thng nh tnh trng ph kin khng ph hp, nt v, thay i hnh dng, mn, phn cng gi c nh b lng, r du (i vi cp OF), hng hc thit b lin quan, tng i tng cn kim tra c nu trong bng di y. Bng 2-59-1 Hng mc kim tra thit b cp du

27

i tng kim tra (1) Thng cha du (1) R du, r kh (2) Nt, g

Ni dung kim tra

(2) ng h o du, ng h o (1) R du, r kh kh (2) Nt hoc v mt knh (3) C ng sng khng (4) Tnh trng van (5) Gi tr hin th chnh xc (6) o in tr cch in (3) ng th (1) Nt, v (2) Thay i c tnh ca du, du i mu (3) Cht ht m i mu (4) Tm thp (1) Nt, bn (2) Thay i hnh dng (3) Bulng lng (5) Con ni cch in (1) R du (2) Nt, thay i hnh dng (3) Bng qun cch in i mu hoc ri ra (6) Van, panel (1) R du (2) Nt, gy (3) Tnh trng van (4) Tnh trng kn (7) ng ch, con ni (1) R du (2) Nt, v, thay i hnh dng (3) Tnh trng lp t (8) Cp iu khin (1) Nt, gy (2) C bng qun nhn dng khng (3) o in tr cch in (9) Hp iu khin (1) Nt, g (2) Tnh trng kn (3) Bulng lng (4) o in tr cch in (10) H thng cnh bo (1) Tnh trng hot ng (2) n hin th v ci (3) o in tr cch in (11) Dy ni t (1) Lng, t cc b (2) t hon ton (3) Mn (12) Bng nhn (1) Ri, mt (2) Nt, bc mu (3) Tnh trng lp t

28

iu 64. Cc hng mc kim tra thit b phn tch du cch in ca cp du (OF) Mc ch ca vic phn tch ny l nhm duy tr chc nng ca cc thit b ca cp du v ngn chn cc h hng c th xy ra. Qu trnh phn tch bao gm vic phn tch kh b phn hy, phn tch m trong du, v phn tch cc c tnh in. 1. Phn tch kh b phn hu Khi du cch in hay giy cch in b nhit phn, cc kh d chy s c sinh ra v kh nng cch in do b suy gim. Mc ch ca vic phn tch ny nhm xc nh s suy gim kh nng cch in. Cc kh c s tng quan vi cc hin tng bt thng sau y c p dng nh nhng tiu chun nh gi. Bng 2-60-1 Loi kh phn tch v nguyn nhn sinh ra Kh c phn tch * Hydro Kh dnh gi s bt thng * Mtan * Etan * Etylen * Axetylen * Cacbon monoxyt [Tng lng kh d chy] H2 CH4 C2H6 C2H4 C2H2 CO TCG Nguyn nhn chnh ca s bt thng S nng ln ca du cch in, phng in vng quang S nng ln ca du cch in nhit thp Phng in vng quang vi nng lng phng in thp S nng ln ca du cch in nhit cao, phng in vng quang Nng lng phng in cao S nng ln ca giy cch in, phng in vng quang c lng chung ca tng lng kh bt thng sinh ra

TCG: L tng lng kh ca cc kh c nh du * k trn Vic nh gi s suy gim kh nng cch in c th c tin hnh cn c vo lng kh Axetylen (C2H2) v tng lng kh d chy. Bng 2-60-2 nh gi s suy gim kh nng cch in cn c vo lng kh sinh ra Danh mc qun l v gi tr tiu chun nh gi Tnh trng nguy him i vi kh nng cch in C nh hng ln n kh nng cch in C nh hng n kh nng cch in C nh hng nh n kh nng cch in 2. Phn tch m ca du Hi m xm nhp vo cht cch in ngm trong du ch yu bm vo giy cch in v gy nh hng rt ln n kh nng cch in. Mc ch ca phn tch l nh gi s suy gim kh nng cch in. Phi tin hnh nh gi s suy gim da trn m trong du cch in nh m t trong bng di y: Bng 2-60-3 nh gi s suy gim cch in cn c vo lng hi m sinh ra Axetylen (C2H2) [ppm] 50