QUY TRÌNH VH và bảo DƯỠNG các máy BIẾN áp KHÔ 10kv 0,4kv

Chr vi6t tft DCS H0 th6ng di6u khien phdn tan MBA PCCC PCT i Phdng chiiy chfra chiiy Phi6u c6ne tac PTT Phi6u thao t6c PGE i Ph6 Girim d6c QE QTQP QuAn ddc Quy trinh quy pham TC Tru&ng

rL,,I\\J UUI\U I Y

^ DIEN LI./C DAU KHi VIET NAM

TTnh, ngdy [4 thang cJ ndm 20 t 5

VG viQc ban hinh Quy trinh vf,n hinh &

bio du6'ng cfc m:iy bi6n f p khd l0kv/0,4kv

cOxc ry DrEN L{Ic nAu KHi HA TiNH

d6ng thdnh viOn Tdng C6ng ty Di6n luc DAu khi ViQt Nam vd vi€c thdnh ldp

chi nhdnh T6ng c6ng ty Di6n luc DAu khi viet Nam - c6ng ty Di6n luc DAu

khf Hd finh;

Cdn cri Quy6t dinh sd 671IQD-DLDK-HETV ngdy 0611112014 crja H6i

d6ng thenh vi6n T6ng C6ng ty Di6n luc DAu khi Viet Nam vd vi6c ph6 duy6t vd ban hdnh quy chti td chri'c vd hoat dQng cta Chi nhdnh Tong C6ng ty Ei6n luc

DAu khi Vi6t Narn - C6ng ty EiQn luc DAu khi Hd finh;

Td chric Hdnh chinh

QUYET DINH:

Di6u 1 Ban hdnh Quy trinh vAn hdnh &bho du0ng c6c miry bi6n 6p kh6

l0kV/0,4kV (nQi dung quy trinh dfnh kdm)

Di6u 2 Quytit dinh ndy c6 hiOu luc kti tu ngdy ky

Didu 3 Ke to6n trudng, Trudng c6c phdng chuc ndng,QuAn d()c citcphAn

Noi nltfin:

- Nhu di6u 3;

- PV Power (thay b6o crio);

Luu VT, PXVH,

D6c lfip - TU do - Hanh phric

vrEl l{anr

ThG H6ng

TONG coxc r

QUY rniNs vAN HANH & BAO OrIOxc

mA urpu: pvpHTero2ovu

FV Porurer Ha Tinh

Hd TTnh, thdng! ndm 2015

Tdi lidu:

Ban h:inh lin thir:

CONG TYDIEN LTI{ DAU XTTINA TINII

QrrY TRiNH vAN HANH & BAO DTICTjYG

cAc nnAy BrEN Ap r*ro lo/o.4kv

i Ngdy hi€u lqrc:

PV Fou/prfi: Tinh : i

PVP

T6p tin:

O2O TVFI VIBA Kho

I

{

\

NGr.lOI DugC PHAN PHOr:

Girim

Ph6 Girlm ddc

Dai dien ldnh d4o vO chAt lugng

Phdng Ky thuat - C6ng nghQ

Luu Vdn thu

PhAn xu&ng vin hanh

Ca vdn hdnh

Van hanh vien tnrc di6n/thi6t blpht,

Don vi Sria chira

CHi TRi SOAN THAO: phin xu6ng Vin hirnh

Chtr ky:

H9 vd tdn: Ld Bii Hung

Chric w: Tru&ng kfp diQn - Tua bin

Chir $i:

Ho va t6n: il, u, :t"- ttlclt //-i

Chric vu: Trtat!, C"

THAM GIA XEM XET VA GOP f T<IPN:

Phdng K! thuAt - C6ng nghQ

NGTIOI DUYET

Chii ky:

FIo vd tOn:

Chric rU;

CONG Ty D\EN LtfC o,iu rcui aA riuu

PV Power HT

Vuy trrntr van tranh dt bao du0ng cic mfy bi6n

6p khd l0/0,4kV Md hi€u PVPHTQT020vrlrrii liQu:

gANc THEo n6I go SUNG SI.IA DoI

LAI{

STIA

PHIEU

YNU CAU

NGAY

sua TOM rAr Ngr DUNG Sr.lA DOr

Ban hdnh ldn thir: j Ngey bi6u lrrc:

r : /g /201s

\<uJ rurr f aD D4utr s lr4u uuuuS l.ac ttral utt,lt

6p kh6 l0l0,4kY Me hi€u tdi li€u:PVPHTQT020VH

I,

2

DI

R

(

couc w otEN tu c oAu rni n) riun

PV Power HT

Vuy rrlnh van hanh dt b:io duffng c6c m6y bi6n

6p kh610/0,4kV

B;#;iiltr"rr.i

PVPFtTQT020!'rl rang so:

) / lt)

; Ngiy hi€u luc

1 Mgc ilfeh

Quy djnh, hudng d6n trong c6ng tac ki6m tra, theo d6i, vAn hdnh va bdo du6ng cdc

mdy bi6n 6p kh6 1010,4 kV cria nhd mdy nhi6t di6n V[ng Ang l.

2 Phgm vi rip dqng

c6n b0 k! thu6t li6n quan trong nha may cli6n Vtrng Ang 1.

3 Tni liQu li6n quan

- Cac tdi li6u huong dIn vdn hanh vd bio du0ng IV{BA tu dirng do nha san xr-r6t

cung c6p.

- PVPVAI QT059VH: Quy trinh vdn hanh h0 thong chira ch6y.

- vAl-vGC-00100-E-E2-DSL-0003: so d6 ngu6n cdp tF d'ng t0kv.

4 Chr vi6t tft

DCS H0 th6ng di6u khien phdn tan

MBA

PCCC PCT

i Phdng chiiy chfra chiiy Phi6u c6ne tac

PTT Phi6u thao t6c PGE i Ph6 Girim d6c

QE QTQP

QuAn ddc

Quy trinh quy pham

TC Tru&ng ca

VHV i Van hanh vi6n

AN ChC d6 ldm m6t t.u nhi6n

CONG Ty DIEN uJ C o'iu rcni ne riuu

PV Power IIT

vuJ rl'rrr van nann o Dao ordng cac may Dlen

np kh6l0l0,4kv

PVPIITQTO2()V}I

Trang 5" N6i dung

5"1 Nguy6n f cdu t4o MBA kh6

Di6u 1 C6u t4o mfy bi6n 6p khd t0t0,4klV

C6c miry bit5n the l0/0,4kv trong todn nhd m6y ld loai miiy birin 6p kh6 co cu6n ddy

dang dirc boc nhua 3 pha, tAn s6 50 Hz, di6u chinh di6n rip kh6ng tii, di6n 6p l0l0,4ky

duoc ch6 tao dri vdn hdnh trong nhd, ldm rnrit bing kh6ng khi ttr nhien (AN)

:::i:.:rir:r,, :i: - :ii),.

1) Ldi tti'

LOi tir cria MBA ducrc ldm ghep bing citc lit th6p dinh hinh cilch di6n Cdu truc theo

dang 2 hodc 3 tru duoc nOi tiOn thinh g6ng theo cric mdi n0i goc PhAn l6i thep duoc

crlch ly vdi k5t cdu dd vd bu l6ng kgp, ngo4i tru vdng nOi A6t L6i tt cluoc b6o v6

r A x

ch6ng lai su nhi6m ban ctia mdi truong bing 2l6p scm c6ch nhi6t cao.

2) Cu6n diy cao rip

Cu6n ddy cao 6p bao gdm Ll dong cudn xoin, c6ch di€n boi md.ng polyseter C6c cu6n

dAy dugc ghdp v6i nhau vd duoc dric nhua epoxy trong chdn kh6ng d0 tao thdnh tru.

C5c dAu.tSi c6c cuQn ddy ducrc dua ra ngodi Ae AAu nOl.

3) CuQn ha 6p

CuOn ha rip cfrng duoc chti tao bing 16 nhdm cu6n c6 crich nhi6t cao Cudn ddy duoc

,A

ttun son trong chAn kh6ng, say luu hod.

4) BO eOi ndc tliQn np

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cirr

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l.r

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Vuy tnnn van hanh dt bao du0ng cic miy bi6n

6p kh6 10/0,4kV Md PVPfrTQT020Vrlhi€u t:ii li€u:

C6c cAu n6i dugc lip 6 cuQn cao rtp MBA d6 chon t1i 19 bi6n rip y€u cAu MBA phAi dugc c6t diQn trudc khi thay AOi ndc ph6n 6p.

5) Gi6 tld trg

C6c cu6n cao 6p vdL cu6n hq dp duoc kep

gi6 dO ciich di€n ddn h6i hoat d6ng nhu

nhi6t

khung chic chin phfa trdn vd phfa dudi qua

1^

'i

bQ giam chAn cho phdp cu6n d6y gidn nd

6) Circ OAu niii cao vi ha ip

Cric dAu cu6n cao vd ha 6p duoc trang bi cac ddu n6i Oe nOi MBA vdi ngu6n vd tii.

Di6u 2 Danh sich cic mriy bi6n 3p f*O sfr clqrng trong nhi miy Vfrng Ang I

(Tham khAo phu luc 1: Scr dd cilc phu tAi hr dung l0kV)

ftVA)

UK ("4\ Remark Unitl SwitchboardA

2 ESP.Txl IOBFT5O l0+2x2.5%10.415k

Unitl SwitchboardB

StationSwitchboarA

5 StationEssentialTA OOBHTO3 l0+2x2.5%/A.415k

6-Water&WWTxl OOBHT3O l}+2x2.5oh1A.415k

7 StationAux.TxA OOBHTO I 10+2x2.5%o/0.415k

S.Admin.BuldingTxl OOBHTOT l0+2x2.5o/o/0.415k

9 AshHandlingTxl OOBHT6O t0+2fl 5%/0.415k

10 FIVACTxI OOBHTO5 10+2x2.So/on.4l5k

StationSwitchboardB

I I" ITVACTX2 l}+zp,.5Ya10,415k

12 AshHandlineTx2 OOBHT6l l0+2x2.5oA/0.415k 3 150 7.5 TRI2

PV Power IIT

\<uJ fr rfrfr I atr rraurt ax uau uuu|lB uau ||tay ulcll

np khd 10/0,4kV Md hi€u tdi lidu:PVPFrTQT020vll

Trang

8t16 V

13 Water&WWTx2 OOBHT3l 10+2x2.5%/0.415k

l4.Admin.BuildingTx

15 StationEss.TxB OOBHTO4 I0+2x25%10.415k

16 StationAux.TxB OOBHTO2 10+2x2.5yo10.415k

Unit2SwitchboardA

17.UnitzAux.TxA 2OBFTOl l0+2x2.5%ol0.4l5k

18 ESP.Tx3 2OBFT5O 10+2x2.5o1o10.415k

Unit2Sr,vitchboardB

19 Unit2Aux.TxB 2OBFT02 l0+2x2.5%/0.415k

20 ESP.Tx4 2OBFT5I l0+2x2.5%o10.415k

FGDControlBuildine

2 I FGDTxI 00BFT'30 l0+2x2.5o/o/0.415k

22.FGDTx2 OOBFT3l fi+2x2.5o/o10.415k

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5-2 Thdng sii t<y rhgt cria c:ic MBA kh6 l0/0,4kV

Didu 3 M:ly bi6n iry lA/0,415 KV - 3750KVA

Nhd s6n xu6t:

Ti le di6n rip:

-l A

I AN SO:

S(i pha:

Dong kh6ng tAi:

Trd khring lJkYo:

Hi0u su6t:

Ki0u ldm m6t:

Nhiet dQ mdi trucrng

al

uap cacn olgn:

Tdn th6t khOng tAi:

T6n thdt c5 thi:

ZHEJIANG JIANGGSHAN TRANSFORMER CO.LTD

1010,415 KV

5\Hz

3

0,2yo 9,20

99,190h Ldm m6t bdng khOng khf r.u nhi6n (AN)

; 40oC (Lem vi6c trong nhd)

F

5kw

25,3kW

coNc rY D.EN tt| c o,iu rcni nt riNa

Vuy rnnn yan nanh dt bao duolg cic miy bi6n

6p kh610/0,4kV Mi PVPHTQT020vrrhi€u tiii Ii€u:

PV Power HT -; , - - i-l l- :- ''

n tnu: i Ngay hteu luc:

I i ( rzott

Di6u 4 M6y bi6n 6p 10/0,415 KV - 3150KVA

- SO n6c ph6n iip:

- KhoAngphln fry:

^K 1 ,

- vap Dao ve:

- Ty l€ di6n rip:

- 36 pha:

- Dong khdng tAi:

- Tr0 khring Ukah:

- Hi6u sudt:

, A

t\.teu tam mat:

C6p c6ch di6n:

mi r on rnat Knong .r K ' ' tal:

T6n thAt c6 tAi:

ai ;

' ^

)o nac pnan ap:

Khodng ph6n 6p:

al

uap Dao ve:

5

+2x2,Sa/o IP31

10/0,415 KV 5AHz

3

0,23ya 7,5yo

99,llyo

Ldm mdt bing khong khi tu nhidn (AN)

F

4,3kW 23,7kW

+2x2,5Yo

IP3I Nhiet d6 mdi trucrng : 40oC (Ldrn vi€c trong nhd)

Di6u 5 M:iy bi6n 5p 10ft,415 KV - 2000KVA

Ty l9 di6n 6p: 1010,415 KV

Tdn s6:

^l

Jo pna:

Ddng kh6ng t6i:

Tr& khilng Uko/o:

A.

Hreu suat:

Ki0u ldm mdt:

5jHz a

0,35yo 5,50

99,04%o

Lam milt bAng khdng khi tu nhi6n (AN) Nhi€t dd mdi trucmg : 400C (Ldm vi6c trong nhd)

Cdp c6ch di6n: F

TOn th6t kh6ng tAi: 3,7kW

T6n thdt cb t6i: l5.5kw

PV Power HT

\<uJ rf rttrr r.rtr rrarril oa uao uuung cac may Dlgn

fp khd t0/0,4kV

5

+2x2,5o/o

IP3I

PVPHTQT020VII

il;gs6,

t0tt6

-^ il brn hanh tan :T- :: thr: - : Ngiy hi€u l[c:

ri

- 56 ndc phdn 6p:

- Kho6ng phdn iip:

ai

- Lap oao ve:

Di6u 6 M:iy bi6n fip tA/0,41S KV - 1500KVA

- Nhd sAn xudt:

- Ty ld di6n dp:

mi X

- SSpha:

- Ddng kh6ng t6i:

- Trd khiin_s Uk%o:

tr.^ A.

- ,tileu suat:

- Ki6u lam mdt:

- Nhi6t dd m6i trucrng :

- CA'p ciich di0n:

- T6n thAt khdng tAi:

-i ., a.

- I On tnat co tal:

- Sd n6c ph6n 6p:

- KhoAng phdn 5p:

aK

- Lap Dao ve:

^A

- Jopna:

- Dong khdng tii:

- Trd kh6ng Uk%o:

A.

- flreu suat:

- Ki6u ldm mdt:

- NhiQt d6 m6i trudng :

- Cep c6ch di6n:

- T6n th6t kh6ng tii:

*A ,:

- lon tnat co tal:

Ei6u 7 M:iy bi6n irp I0/A,415 KV - 1000KVA

- Nhd SAN XU6t: ZHEJIANG JIANGGSHAN TRANSFORMER CO.LTD

ZHEJIANG JIANGGSHAN TRANSFORMER CO.LTD

t0/0,415 KV

5jHz

a

0,40

5,}yo

9g,g70h

Lam miit bang khOng khf ru nhi6n (AN)

+OoC 6am vi8c trong nhd) F

2,7kW 12,gkw

5

-L2x2,5o IP31

5DHz

t

0,40A

4,75yo 98,glYo Ldm miit bing khdng khf t.u nhi6n (AN) +OoC 6am viQc trong nhd)

F 1,9kW 9,Okw

CONC Ty D\EN tt| C OtiU xai nA ri|a

PV Power HT

Vuy trrnn v?n hatrh & bflo dudng cic m{y bi6n

np kh6 10/0,4kV

I

5

+2x2,5yo IP3I

PVPHTQTO2()YII

/tl/20t5

Trang

- Khoing phdn iip:

nA

- vap Dao ve:

Di6u 8 Rcr le bio vG mriy bi6n 6p tF ding 10/0,4kV

- Loai role:

- Nha sin xuAt:

Sepam T81 Shneider

- CAc chfc nlng b6o v6:

/ Bdo vC qud taj (49) / Bho v€ dong thri tu nghich (46) / Bho vd quii dong (50/51)

5.3 Vfn hinh MBA khd l0i0,4kv

Di6u 9 Ki6m tra tnnic khi rl6ng di6n

MBA ph6i duoc I*p dat, n6i c:lc ctJs cao, hq ap theo dring thu'tu pha, cirng voi cric m6i nO; A6t vd c6c mach phu Sau khi IIp ddt vd AAu nOi MBA, cdc cu6n ddy ph6i duoc ki6m tra vd vd sinh s4ch cric phAn dr kim lo4i

Tru6c khi d6ng di6n phii thuc hi6n ciic bu6c ki6m tra du6i day:

- Dam b6o tdt ch circ pha ddt n6c phdn 6p phfa cao iip ld gi6ng nhau vd phu hgp didn

rip d6u vdo MBA

- Ti6n hdnh kitim tra didn tfd c6ch di0n.

- Ki6m tra dAu do nhi6t dd rlang 6 trang thdi ldm viec

nhAm kh6ng

Ki6m tra t6t ch cdc phi6u c6ng tiic dd hodn thdnh vd khoa phi6u, thdo todn b6 cac titip dia bi6n b6o, rdo ngdn tam thdi

Ki6m tra hQ thting b6o v0, cric thit5t bi vd c6c giir cli6rn ddt bAo v6 dring rheo ti6u

chuAn ttrit5t t6 Dua todrn bo hq thdng b6o v€ viro ldm vi6c

Ki6m tra so c16 el6u didn vd phitiu thao tdc ctil d6ng diQn.

PV Power HT

' 4u uAurr q u4u uuulIB viLE [la! ulcll

:ip kh6 lA/O,4kV

r! tzots

Me hieu iai liCu:

P\rPHTQT020vrl Trang sd:

12/16

Didu 10.

Khi d6ng dign MBA cho chay khong t6i, ddng khoi ddng c6 thii bing tir 5-12 ldn ddng

dAy tAi binh thucrng do d6 ro le bAo v6 phdi duoc cdi dflt cric gil, triphu hcr-p dC tr6n;

kh6ng tdc d6ng nhAm"

Di6u 11.

Khi MBA duoc dua viro ldm vi6c lai sau kho6.ng thcri gian ddi bd:o qtrdn hoac kh6ng

; , " - ., 2

vdn hdnh thi cAn ph6i vd sinh bui bAn, Am ucrt cudn ddy bing mdy n6n khi kh6 6p suft

thAp, ding gi6 kh6

Didu 12.

Trong gi6i han di6n 6p cho ph6p, rnriy bi6n 6p co th6 van hdnh llu dai d trang thai qu6

di6n rlp voity l€ di6n:ip vatAn sO larn vi6c kh6ng vuor qua 5%ty 16 o clien Ap va tAn

s5 dinh mtrc.

Didu

13-f7l : ,

Khi str co, mdy bi€n rip duoc phep qud tAi ngin han cao hon don_e di6n dinh muc theo

circ gioi h4n sau ddy (khdng phu thu6c thdi gian va tri s0 cfra dong di6n tnr6c khi su

i , ^

co khong phu thuoc nhi6t do mdi trLrong ldm miit)

Qud tAi theo dong diQn, o/o

Di6u 14.

Khi c6n di6u chinh ti sO bi0n 6p de bir vao su bi6n thi€n di6n 6p ng,-r6n, phii thuc hi6n

theo trinh t.u sau:

2) KiCm tra khdng con di6n vd thuc hidn n6i Adt Ae xh iry du trong cdc cudn day (n6i

di0m ctAu cu5i cu6ng dAy vdo di6m

"Oi Odt;.

3) Me hdp ndi b9 d6i nilc phiacao 6p bi6n 6p

4) Noi lai thanh nOl UO OOi ndc biiin 6p t6i vi trf phir hqp nh6t ae tnicn img v6i di6n

iip vdo nhu so dO tren nhln mrly

5) D6ng hQp n6i b6 d6i n6c

6) Th6o dd tiep dia di d6ng ciic cu6n ddy MBA

7) T6l ldp d6ng ctien lai MBA

='0

\r{f

.iu

.ru

{H

.<

gl

=

PV Power HT

Vuy rnnn v?n nanh & bao drong cic m6y bi6n

:ip kh6 1010,4kV

i Ngiy hi6u lpc:

PVPHTQT02OVTI

Di6u 15 Ki6m tra dlnh kj'trong qui trinh vfln hlnh

- DCu dan ti6n hanh kitim trabho duong theo lich b6o duong & Di6u 20 Ddc bi6t chu y, n6u mdi trudng v4n hanh qu6 b6Ln thi khoing thoi gian b6o du6ng n€n thay

eOi tai.

- Ntiu c6c truc trdc tim th6y md khdng th6 loai trlr duoc ph6i lidn h6 vdi nhdr sin xu6t

d0 c6 c6c hudng dAn k! thudt cu thO.

Di6u 16 Ki6m tra khi m:iy kh6ng tim viQc

N6u MBA chi duoc dinh kj' c6p ciiQn thi cilc ki6rn tra du6i diy phAi tidn hdnh sau

khodng thoi gian ddi khOng hoat cldng thi clinh kj,ph6i dung m6y nen khong khf dp sttzit thdp vd ,eie khd lau chui bpi bdn dm trot ci{c cudn dAy, ki0m tra do dac c6c th6ng sti ty thu6t tdt cit ciic nQi dung ki6m rra, bAo du0n,e ph6i ducr c ghi lai vdo s6 NKVH

cucmg vi

Didu 17.

Ndu MBA bi 6nh hucrng bdi cric tnrcrng hqp bft thuong nhu ddng dAt, ngin mach, qu6

tii b6n ngodi thi ph6i kidm tra ttmg mr.rc cira bin danh s6ch ki6m tra bio dtrone theo Di€u 20 cria quy trinh niy

5.4" Cficbit thudrrg vi biQn ph:[p xfr ty

Di6u f8

Khi xdy ra su tdng qurl gidi han nhi0t dd cudn ddy MBA, cdn ki6m tra c6c nguy€n nhdn sau:

- Kha nang bi qu6 tii li6n r.uc

- Ng5" mach tai mdt trong c6c phu t6i MBA

- ch6 dQ ldm m6t kh6ng t6t

Didu 19.

Khi mdy bi6n 6p bi chfty, vi6c chta ch6y MBA dp dung theo ervH hq thOng pccc vfi cdc budc chfnh nhu sau:

l - Brio dQng chdy toan nhd miiy, b6o c6o ngay cho Tru&ng ca d6 huy ddng luc lugng phong chta ch6y cria nhd miiy

2 Ki€m tra ciic mdy cat cria mriy bi6n rip c6 t.u dQng cat kh6ng n€u chua cit thj phLi chtngay citc m6y cltvd dao c6ch ly de c6t dien MBA

3 Nifu h?a vdn ch|y, c6n thuc hi€n cdc biQn phrip tt0 ngdn ciich ving bi chrly v6i

vung hia cd th€ lan trii

PV Power HT

dp khd tAtA,4kV Md hifu trii li€u:PVPltTQT020Vrl

nito, CO2, bqt hod hgc vd crit di5 cr?u ho6 Luu y: C6c binh khi x6ch tay, binh bot

uu ti6n sri dung tru6c

5 Dirng thi6t bi voi phun nu6c cia h6 th6ng criu hoa ae aap tit ngon Iua

6 N6u ddm ch6y lcnr kh6ng c6 khi ndng d4p tft bing lgc luqng PCCC cira nhd

miiy, thi ph6i liOn lac voi dcrn vi chira ch6y chuydn nghiqp cira dia phucrng d€n

h6 trcr chiia chiiy theo quy trinh pCCC nhd m6y.

Di6u 20 Mdt sii ndt ttrudng vi biQn phnp xfr Iy

5.5 Ki6m tra bio dudng itinh k)

Didu lI Danh mgc ki6m tra bio rlr.rirng

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rY

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STT BAt thudng Nguydn nh6n Nh&ng viQc c6n ti6n hinh

I Quri nhi6t

Quri di6n 6p dAu vdLo voi

dAu phAn ap dE cho.n

Ki6m tra chfnh x6c v!trf ddu

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phein ap va di0u chinh lai ndc phAn 6p phu hqp.

Nhitt dO phdng cao Ki6m tra tdng cudng thdng gi6

cria phong chr?a MBA

Qua tai MBA Gi6m bdt phu tii vd trong khd

ngang cho phdp cria MBA

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Qud nhi0t cuc

bO trong l6i

thep

Do ddng phu c6 trong l6i

g5ry rabcri ng6n mach vdng ddy hodc cdc khuy6t t6t ciich tliQn lOi tir

Ki0m tra bu l6ng l6i vd c6ch

di0n cu6n ddy, do di6n trer I

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cnleu-A

a Ti6ng 6n

Qud rip dAu vdo .

KiOm tra vi trf cria cdc thanh

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nol oau pnan ap.

Ch6t luong gh6p n6i cria I6i tir

B6o d6ng hoflc

tiic d6ng cria

bd gi:im s6t

nhiet dd

Sg cO que do nhi6t d0

d K, ^

VtOi nOi diQn bi l6ng

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r ac ong tam mat

Thay thi!

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r hay the Si6t chat lai

Lam thong