Qua tai theo dong di¢n, % 20 30 40 50 60
T/gian qua tAi, pMt 60 45 32 18 5
Cacmay billn ap d~u dllQephepqua tai cao hon dong di¢n dinh mile toi 40% voi t6ng thoi gian khOng qua 6 giil mOt ngay dem trong 5 ngay lien tMp voi dillu ki¢n h¢ s6 ph\! tAi ban dAu khOng qua 0,93, khi d6 phai ~n dungh~t khA nang moi trang bi lam mat caa may bi~n ap,
Di~u 629: May bien ap lam mat theo dang' QQ, khi tat ca
quat gi6 bi cat do sll c6, dllQe phep lam viec voiph\i tM dinh
mile lily thea nhiet dO khOng khi xung quanh trong thili gian quy dinh nhu sau:
Nhi¢t dO khOng khi xung quanh·C. 0 10 20 30 T/gian' eho phep,giil 16 10 6 4 May bien ap (cuon di¢n khang] lam ma~ theo ~ng KD va ND duoc phep:
a, Lam viecvdi phi} tai dinh mile trong thoi gian 10 phut hoac lam viec 0 eM do khong taitrong thili gian 30 phtit khi ngung lam mat ellllng bile. Neu Mt thili gian k~ tren, nhi¢t dO dau 0 lop tren ehlla toi 80°C - d6i voi may billn apeOng sollt til 250 MVA tro xu6ng va d6i voi cuOn di¢n khang; '75"C d6i voi II1:\Y bi~n lip lren 250 MVA thi chophep tillp tyclam vi¢<: voiph\! tai dinh mil~ eho d~n khi d<lt d~n nhi¢t dOk~ tren, nhllng khong dllQe keo dili qua 1 giil: .
b. Lam vi¢<: lau dili voi ph\! tAi gi:\ll1 bOtkhi nhi~tdO dAu o lop trenkhOng qua 45"C khi ngilng toan 1>0 ho~<: mOt pblln q""t. giO ho~e khi ngilngnlloe tulln hoon nhllngv~n duy ttl tulln hoon dAu.
May bi~n ap lo~i dAu tulln hoan cO hllong. ttong cae euOn
'li day~::: :::et::d:::~::::ga:::u::d::::n:~o~oi
bien ap kU!u luu dong, ki~u ban kin hoac nha cM tao khong cho phep.
Dieu 631: Viecv~n hanh DAT pMi theo dung quy trinh cila
nha chetao,
Dieu 632:0 tung noi, pMi xac dinh s6 luong may bien ap lam viec dbng thoi, tuy theo bieu db phu tai, co xet d6n d¢ tin cay cung csp dien cho cac M dung dien,
ocac luoi dien phan phoi dien ap 15kY tro xu6ng, pMi ti~n hanh do phu tai va di~n ap cua cac may bien ap mlli nllm it nMt 2 Ian vao thoi '-1' phu tili cao nhat va tMp nhllt.
Dieu 633: Diem trung tinh cua cuon day til 110 kY tro len cua may bi~n ap tl/ ngilu va caa cuon di~n khang phai lam viec o che dO.n6i dat true ti~p.
. Cac may bien ap 110 kYvii 220kY voi di~n ap thi nghiem
di~m trung tinh !IIong itng bang 100vii 200 kY c6 tM lam viec voi di~m trung tinh khOng n6i dat vOidi~u kien di~m trung tinh d6 dU<)C bao v~ Mng cai ch6ng set. .
Dl/a vao nhilng tinh toanc6 din cit, chopMp maybi~nap 110kY e6 di~nap thi nghiemdi~m trung tinh Mng 85 kY dU<)c lam vi~ vOi trung tinh khong n6i dat voi di~u ki~n di~m trung tinh d6 lIu<)c bilo v~ bang cai cMng set.
Dieu 634: Khi rO Ie Milac dong bao tinbi~u, philiti~n hanh
x~mxetphia ngoai maybi~nap (cuon di~nkhang),laymilukhi trong rO Ied~pMn tichvii ki~m tra tinh cMt cMy Clla khi.N~u
khi chay dU<)Cho~c trong khi c6 chila nhilng san pMm do phan huy cMt cach di~n, pMi nhanh ch6ng cat may bi~n ap (cuon
di~n khang).
Dieu 635: 1fuilng h<)p maybi~n ap (cuon dien khang) bi cat tl/ dOng do tilc dong Clla bao v~ ch6ng hu hOng ben trong may·
bMn ap (cuon dien khang), chi cho phep d6ng vao lam viec tra lai sau khi dll xemxct, thit nghi~m,pMn tich milu khi va khac phuc nhilngdi~m bllt thuilng daphat hien.
Neu viec cat may bi~n ap dilnd~n viecngtrng cap dien coo nhilng M sit dung dien, cho phep dung may cat dien d6ng ~i
mot Ian neu may bien ap d6 c6 cil bao ve so lech va bao ve hoi nhung chi bi cat boi mot trong hai bao ve d6 vii khOng thSj' ro dau hieu ben ngoai chilng to may bi hu hong, .
Truong hop may bien ap (cuon di~n khang) bi cat tl/ dong do bao v~ khac ngoai so lech va ro Ie hoi c6 tM d6ng maybi~n
ap (cuon dien khang) tro lai lam viec khOng can ki~m tra. Dieu 636: May bien ap COng sullt ti/l60 kYA tra ltn va cuon dien khang phai dU<)c van hanh cung voi h¢ th6ng tai sinh dau lien tuc trong cac binh IQe siphOng nhiet hoac binh IQC blip thu. Dau trong binh dau phu caa maybi~n ap (cuen dien khang) pMi dll<)e bao v¢ tninh ti~p xtie trl/c ti~p voi khOng khi xung quanh.
Maybi~n ap (cu¢n dien khang) e6 trang bi b¢ p~n chuytn _ dung d~ ch6ng nhi~m 11m dllu pMi dUQc ~n hanh voi sl/ lilm
viec thUilng xuytn Clla b¢ pMn d6, khOng phu thu¢CcM dO lilm vi¢c cua may bi~n ap (cuon dien khang); cac bO pMn k~ trtn pMi dU<)C v~n hilnh theo quy tdnhella nba ch~ t~o. .
Dlio trong cac sit dien e6 dau pMi dUQc bao ve cMng oxy bOa va cMngnhi~m11m.
Dieo 637: Maybi~n ap (euon dien khang) pMi dU<)C d6ng vao hloFbilng each dOng xung Dch toan b¢ dien ap.
Maybi~n ap lamvi¢C theosQ db kh6i voi may pMt dien c6 voi may pMt dien bang each nang dien ap til khOng h~c Mng each d6ng xung DCb.
Dien 638: Viec kil!m tra may bil!n ap (cuon di¢n khang) rna khOng cAtdien pMi til!n hanh thea dinh kY nhu sau:
a. 0 noi c6 nhan vien true nhat thuong xuyen:
• M6i ngayit nMt mot Ian d6i voi cac may bil!n .pehinh cua nha may di¢n va eua tram bil!n ap, cac may bien ap tl! <lung lam viec va dl! phong, cuon dien khang,
MOt tuan it nMt mer Ian d6i voi cacmay bien ap khac;
b. 0 noi khong c6 nhan vien true nhat thllilng xuyen:
Khong qua mOt thang mot Ian d6i voi MBA ehinh.
Tuy theo dieu kien cu tM tirng noi, 1.)'gil chinh nha may
dien hoac So Dien Iuc e6 tM thay d6i thili han neu tren.
Dien 639: Viec sitaehua nho cac may bien ap (khong e6
DAT) va cuon dien khang e6 cat dlen khoi IIl6i phai tie"n hanh: a. D6i vOi cac may bil!n ap chinh cua nha may dien va tram
bien ap, cacmay bien ap til dung lam viec va dll phong, cac
eUOn dien kMng it nMt hai nam mOt Ian.
b. D6i voi nhUng maybie"n ap dijt 0 noi c6,nhieu blii Mn .thoo quy trinh rieng.
e. D6i vOi tllt cA cae may bie"n ap khae • tuy thOO mite dO can thie"t nhllng !thOng it hon 4 nAm 1Ian.
Siia ehila nho cae may bien ap va may bie"n ap til ngilu c6
DAT pMi tie"n hanh Mng nAm.
Siia chUa ngoai ke" ho~eh thie"t bi DAT dlll,le tie"n hanh sau mOt ~6 Ian thao tae ehuyen m~eh nMt dinh theo quy trinh eua nhll eM t~o.
Siia ehil. nhOhi)tMng lam matd~ngT,K~D,N·DpMi dllilC tien hllnh hang RAm.
Dong thili vOi sila chila nho may bien ap (euOn di¢n kMng) I'M! sila chUa nhOcac sitdhu vao ella may.
Dieu 640: Sita chUa Ion cac may bien ap (cuOn di¢n khang) pMi tien hanh;
a. D6i voi cac may bien ap ehinh ella nha may di¢n va Ir.tm bien ap, cacmay bien ap IIIdungcaa oM may di¢n va caceUl\)n di¢n khang:
• Sila ehila Ion IAn dhu tien khong qua8 nam ke til khi dlla may vao van Mnh c6 x6t den ket qua thi nghiem dl! phong con Ian sita chua tiel' thea - tuy thuoc vaoket qua do Illilng vatinh trang cua may;
b. Ole may bien ap khac - tuy'theo ket qua thi nghiem va
tinh trang may.
Dieu 641: Thi nghiem dll phong va do luong cac may bien ap (cuon di¢n khang) va cac sit cua chang phai tie"n hanh phu hop voi "Tieu chuan thi nghiem thiet bi di¢n" hi¢n hanh va quy
djnhcua nha chetao. nt ca cac ket qua thi nghiem cacmay bienap llle (euOn di¢n khang) pMi dlll,le ghi eMp thoo mAu quy dinh.
Chllong 29
H¢ rn6NG pHANPH61 DI~N
DieD 64Z:Ole thiet bi di¢n eua h¢ tMng phan pMi di¢n - (HPD) mQi~ng va mQi di¢n ap thea cae 56 lieu dinh mite ella chUng pMi Mo dam cae dieu ki¢n lam vi¢<: trong eM dO ~n
'hanhbinhthllilng cUllgnhll khi ugh m~eh,qua dien apva qua tai.
NMn vien v~n hanh trong HPD, phai nam vi/ng SOdl\ va
cac ehi dan theo cac eM dO lam viec eho phep cua cac thiet bi
dien trong cac die" kien binh thuong vii s1$ c6.
Dieu 643: Khi khai tMe HPD phai dua van lam viec thuong
xuyen tlltca cac phan doan va he rhong thanh cai (tril thanh cai
duong vong), cang nhu tllt ci cac thiet bi dien, trit thiet bi du
phong.
Dieu 644: ClIp' each dien qia cac thiet bi dien phai tuong ilng vOi dien ap djnh mile ella luoi dien, con cac trang bj baa ve eh6ng qua dien ap phaiphu hop voi mile eachdien ella thiet bi dien.
Khi b6 tri thiet bi dien 0 nhi/ng noi e6 mOi truang bui blln phai c6 cac bien phap bao dam eho cac each dien lam viec duoc dille chan: " cache tMng phan pMi dien ngoai troi (HPDN) - sil dung each dien loai tang cuong, rila lam sach, phulop kern
chong 11m; 0 cac hetMng phan pMi dien trong nha (HPDT) - eMng b\li va khi xam th1$e IQt vao; 0 cae he th6ng pMn ph6i dien hQP 1>0 (HPDH) - dilng cae til kin va caeh dien pM kern eh6ng 11m.
Dieu 645: cae ket ciu bi pMt n6ng 0 glln cae phlln m~eh
dien va 0 eM nMn vienv~nMnhd~ eh~mpMi, nhiet dO khOng vuot qua +50°C.
Dieu 646: Nhiet dO trong nha " cae HPDT trung mila he kMng duoe vtl\lt qua +40°C. Trang trtlang h\lp nhiet dO vtlQt qua 40°C pMi c6 cae bien pMp mm giam nhiet dO ella cae thiet bi dien h~e mm giam nhiet dO khOng khi lam mat.
Dieu 647: 0 cae (HPDN) pMi c6 cae bien pMp nganngita . khOng eOO cae dOng vlit va ehim ehui vao.
Up pM san nha khOng eOO phep tao thanh cac buixi mling. Giila cac cay c6iva cac phan mang dien trong HPD pMi e6 khoang each loai tril duQe kha nang ph6ng dien.
Dieu 648: Cac muong vii ranh cap 0 cac HPDN vii HPDT phai duoc ~y bang cac tllm nap khOng eMy. 0 nhi/ng 16 cap vao nha, xuyen wang, trlln ra khoi muong cap phai du<,lC bit kin hang cac v~t lieu khOng chay,
Cac ham cap, muong cap phai duoe gii/ gin sach se phai c6 trang bi bao dam thai nucc.dong.
He thong chua dau, hO chua 56i, he th6ng thoat tMi dllu phai bao dam hoat dong t6t.
Dieu 649: Mile dau a cac may cat dau, cac may bien ap do
1uong, cac 5lieo dau khong duoc vUQt khoi gioi han chi thj dau trong pharn vi nhiet dO eho phep (t6i da va t6i thieu) ella moi truong xung quanh.
DlIu 0 cac su dau vao phai bao ve eh6ng ltm vii oxy hoa, Dieil 650: De lo~i trit s1$ pMt n6ng 0 cae m6i n6i thanh cai Iroug cae HPD pMi dinh kjrki6m tra bang cae ehi thj nhiet di dOngho~e c6 dinh.
Dieu 651: cae HPD dien ap til 3 kV tro len pMi trang bi cae kh6a lien dOng, nhllm ngAn ngila vi¢c thao IAe nhllm cae dao caeh Iy, <lao IAeh m~eh, dao 11;I0 ngan lO",eh, xc ehuy6n may cit, <lao ti6p dilt...
cae khOa lien dOng ngolli hAmCO hQCdn pMi thllang xuyen
k~ ehi.
NhAn vienv~nhilnh, tr1$e ti6p thao IAe cae thi6t bi tren khOng dllQC phep 1\1 YlOo cae kh6a lien dOng.
BIeu 652: 0 cac tram bien ap, tram clt cling nhll cac cong trinh khac d~t tren COt khong co ,hang rao Yay quanh thi cac tay truyen dOng dao each Iy va cac tli phan pMi di¢n h\I ap phai duoc kh6a lai,
Thang ~t c6 dinh dl! treo len san thao tac cling pMi co khoa lien dOng voi dao each Iy va dll<)e kh6a lai,
Viell 653: DI! thlle hi¢n ti~p d~t elia HPD dien ap til 3 kV tro len phili dung dao ti~p ~t ~t c6dinh.
,
Tay g\lt cua bo truyen dong dao ti~p d~t phai son mau do con Illai dao thi son do e6 vach trang, '
Dieu 654: Thoi gian giila hie ngilng may toi lile khOi dOng tiep theo cua may nen khi (khi tarn ngilng lam viec) khOng duoc it hOn' 60 phut d6i voi may nen khi lam viec voi ap suat 40-45 kg/em2 va khong du<)c it hon 90 phut doi voi may nen khi lam viec voi ap s~t 230 kg/em2.
Vi¢<: b6 sung IIl<)ng khOng khi elia cae may nen khi dang lam vi¢e phili bao dam khOng qua 30 philt doi voi cae may nen khi lam vi¢<: voi ap su~t 40-45 kg/em2 va 90 philt d6i voi cae
may nen khi 230 kglcm2.
BIeu 655: Khil nang Illu thOng cUa cae van, van giilm ap va cae dllilng 6ng dAnkhi trongM th6ng pllan pMi khi pMi dam bao ph11e hlli ap s~t khi trong cae binh ehfta khi elia may clt di¢n khOng muOn qua 3 philt sau khi may clt di¢n tae dOng trong ehe dO tll dOng d6ng I\li khong lhanh rong, d~n tris6 lip s~l khi eho phtp may cll di¢n lam vi¢<: trong eM dO nay.
Ap s~l khi trong binh ehfta khieUa may clt di¢n khOng khi lam vi¢<: a chi! dO hai llin 111 dOng d6ngl\li (ehu kY 0 - t5t - , BO - 20 • BO) sau lan til dOng d6ng I\li llin thft nMt khOng
~hanh cong, pMi dat dllQc tr]s6 cho phep ntay clt di¢n I~ vi¢<: o chu kY Bo trong tMi gian khOng qua 20 giay.
• Dieu 65~: H~ thongdi~u khil!n tll dOng, bao v¢ va bao hi¢u cua lrang bi khi nen cfing nhu cac van an toan pMi du<)c d' h
kY kiem Ira va di~u chinh co M tMng. !D Dieu 657: DO am tuong d6i dinn msc elia khinen a ap su~t
lam viec phai: ,
- KhOng .lon qua 50% d6i voi may cat dien voi ap sU~1 dinh mile 20 daN/em2va cac bo truyen dOng bang khi nen cea cac may cal dau va cac thiet bi khac,
.• ~hOngIon qua 25% doi voi may cat di¢n vOi ap suat dinh ' muc tl! 26 daN/cm2 tra len. .
Cho phep sil dung khi nen c6 dO am tuong d6i IOn non 50% cho cac bO truyen dOng bang khi nen cua cac may cal dau va cac thiet bi khac trong dieu kien co cac bien phap khOng dl! dong hoi mroc lrong cac dUilng 6ng dan va lrong cac b¢ troyen
dOng. "
•.SO db .n6icae binh chfta khi nen(c6 ap su~t 40-45daN/cm2) phal dll klen dl! lubng khi nen noi li~p luu thOng khong it hon hai va khOng qua b6n elia cac binh ehfta khi nen.
Vil;u 658: PMi hilt khi lim trong cae binh ehila khi nen c6 ap s~t40-45 daN/cm2it nMt 3 ngay 1 lan, ~na cae c6ng trinh khOng c6 nguili lrlle nh$t lhithlle hi¢n thoo lieh.
Vieu 659: Khi nen, sit d11Rg cho cae may clt dien khOngkhi
va cae b¢ troyen dOngcUa cac thiel bi We pMi loai tril cae t\lP eMl co khi bang ,each~l cac tam IQC a Iii pllan pMi khi
eUa may cat va, a dhu vao m6i b¢ ph$n tru~ndOng bang khi
Sau khi 131' rap xong he thong khi nen, truoc khi n~p khi
nen vao binh chua cua cac may cat dien khOng khi va cac bO
truyen dong Mng khinen pMi th6i SIIch cac duong dan khi,
De tranh nhiem blln khi nen trong qua trinh van hanh phai W,n hanh tMi sach:
- Cac dllilng 6ng dlln true chinh, khOng it hon 1 Ian trong 2thang.
- Cac duong 6ng re nhanh va duong 6ng n6i den cac Ihiet
bi - sau mili Ian sila chila Ion thiet bi.
- Binh chua khi nen cua may cal dien khong khi truce mili Ian nap khi nen vao khOng it hon 1 Illn trong 1 thang,
Dien 660: Cac binh chila khi nen cua may cat dien khOng khi va cac thiet bi khac cung nhu rnoi binh chila khi nen khac phai dap ilng cac yeu cau cua "Tieu chuan an loan khi v~n hanh. cac binh ap luc",
Kiem tra phia trong cac binh chila khi nen, cang nhu cac binh chila khi nen cua may cat dien khong khi va caa cac thiet bi kMc phili tien Mn.h it nMt 1 Illn Irong 4 nAm, thi! tMy I\lC it D.hllt 1 Illn Irong 8 nAm (IMng ke blnh chila khinen elia may cat dien khOngkhi va cac thiet bi khac).
Thil thuy I\le cac blnh chila khi nen cua cac may cAt dien khOng khiphili tien. hanh trong tn1llng hQp pMt hien D.hilng hll
/
hOng, nghi ngll cOanh hllong den dO~n elia blnh.
B~ ~I phia Irong clia cac blnh chila khi nen phili cO I6p cMng ri.
Dien661: Phili dinh Icy ki1!m tra S\l k!tOng gian do"n clia thOng gi6 ben Irong cac sil clia cac may cat dien khOng!<hi. Thlli.
h~n ki1!m tra dinh Icydll9C quy dinh trong quy trlnh dia phll<lng
cO chu yden cae chi dlln cua nM cM I~o.
?fll!
Dien 662: 6 Ilit eli cacthiet bi eung D.hll trenciic cila ravao cliaHPD pMi c6 chil ghir6 ten va nhiem V\I cUachung. ala ravao cua HPDconphili treonhilng bienbao vacacbien h1l6ng dan khac theo dung qny trinh.
Thiet bi trong HPD pMi danh 56 theo Icy bien tMng D.hllt chung trong loan nganh,
Tren cacbang d~tcllu chily phai ghi ro d1lng dien dinhmilc
dAy chay,
Bien 663: 6 may cat dien va bOphan truyen dOngcaa n6
phai co bO chi thi vi tri d6ng ho~c cat.