TNG CNG TY IN LC VIT NAM
CNG TY IN LC I----------------------------
BIN PHP AN TONCHO TNG CNG VIC CA CNG NHN QUN L VN HNH, KINH
DOANH, TH NGHIM IN, XY LP V SA CHA IN
H Ni, Thng 5 Nm 2006
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TNG CNG TY IN LC VIT NAMCNG TY IN LC 1
CNG HO X HI CH NGHA VIT NAM
c lp T do Hnh phc H Ni, ngy 31 thng 5 nm 2006
S: 1011 /Q-L1-P11
QUYT NH CA GIM C CNG TY IN LC 1 V vic ban hnh Quy nh bin php an
ton cho tng cng vic ca cng nhn qun l vn hnh, kinh doanh, th nghim
in, xy lp v sa cha in GIM C CNG TY IN LC 1 Cn c Quyt nh s 146 TTg
ngy 07/04/1993 ca Th tng Chnh ph v vic thnh lp li Cng ty in lc 1;
Cn c Quy ch phn cp qun l c ban hnh theo quyt nh s
33/Q-EVN-HQT-TCCB.L ngy 31/01/2000 ca Hi ng qun tr Tng Cng ty in lc
Vit Nam; Xt ngh ca ng Trng phng Thanh tra an ton Cng ty. QUYT NH iu
1. Nay ban hnh km theo quyt nh ny Quy nh bin php an ton cho tng cng
vic ca cng nhn qun l vn hnh, kinh doanh, th nghim in, xy lp v sa
cha in p dng trong ni b Cng ty in lc 1. iu 2. Cc n v v c nhn xy ra
tai nn lao ng do vi phm quy nh ny, tu theo mc vi phm s b x l theo
quy nh ca Cng ty in lc 1. iu 3.Cc ng (B) Gim c cc n v c trch nhim t
chc ph bin v tp hun quy nh ny cho tt c cn b cng nhn vin c lin quan.
iu 4. Quy nh ny c hiu lc k t ngy k. Cc ng (B) Gim c cc n v trc
thuc, Trng phng Cng ty c lin quan cn c quyt nh thi hnh.Ni nhn:-Nh
iu 4 ( thc hin) -Ban Gim c, C C.Ty. -Cc phng P4, P7, P9, P12. -Lu
VT, P11.
GIM C
Nguyn Phc Vinh ( k)
2
TNG CNG TY IN LC VIT NAMCNG TY IN LC 1
CNG HO X HI CH NGHA VIT NAM
c lp T do Hnh phc
QUY NHBIN PHP AN TONCHO TNG CNG VIC CA CNG NHN QUN L VN HNH,
KINH DOANH, TH NGHIM IN, XY LP V SA CHA IN
(Ban hnh km theo quyt nh s:1011 /Q-L1-P11, ngy 31 thng 5 nm 2006
ca Gim c cng ty in lc 1) PHN 1 QUY NH CHUNG 1. C s php l. Quy nh
Bin php an ton cho tng cng vic ca cng nhn qun l vn hnh, kinh doanh,
th nghim in, xy lp v sa cha in c bin son da trn cc vn bn, quy phm
php lut sau: 1.1. Quy phm k thut an ton khai thc thit tr in cc nh
my in v li in ban hnh theo quyt nh s 25 L/KT ngy 22/01/1985 ca B
Trng B in lc. 1.2. Quy phm k thut vn hnh nh my in v li in ban hnh
km theo quyt nh s 199 NL/KHKT ngy 17 thng 4 nm 1990 ca B Nng lng.
1.3. Quy trnh KTAT in trong cng tc qun l, vn hnh, sa cha, xy dng ng
dy v trm in ban hnh km theo quyt nh s 1559 EVN/KTAT ngy 21/10/1999
ca Tng Gim c Tng Cng ty in lc Vit Nam. 1.4. Quy trnh iu h thng in
Quc gia ban hnh theo quyt nh s 56/2001/Q-BCN ngy 26 thng 11 nm 2001
ca B Trng B Cng nghip. 2. Quy nh Bin php an ton cho tng cng vic ca
cng nhn qun l vn hnh, kinh doanh, th nghim in, xy lp v sa cha in nu
ra nhng iu c bn cn phi nh v cc bin php an ton bt buc phi thc hin m
bo an ton khi n gn, tip xc vi thit b in cng nh khi thc hin cc cng
vic trn li in. 3. Nhng bin php an ton thuc mt s cng vic thng ngy,
nu trong quy nh ny c trch dn t "Quy phm k thut an ton khai thc thit
tr in cc nh my in v li in ban hnh theo quyt nh s 25 L/KT ngy
22/01/1985 ca B Trng B in lc, "Quy trnh k 3
thut an ton in trong cng tc qun l, vn hnh, sa cha, xy dng ng dy
v trm in ban hnh km theo quyt nh s 1559 EVN/KTAT ngy 21/10/1999 ca
Tng Gim c Tng Cng ty in lc Vit Nam; ti liu k thut ca cc thit b in v
nhng bi hc kinh nghim rt ra t thc t sn xut v cc v TNL trong hot ng
sn xut kinh doanh ca ton Tng Cng ty in lc Vit Nam. 4. Trn c s cc
bin php an ton cho tng cng vic ring l c quy nh trong phn 2 di y, cc
n v lp bin php an ton thi cng khi tin hnh cc cng vic trn li in. 5.
Cc n v t chc tp hun cho tt c cn b cng nhn vin c lin quan (c kim tra
st hch) h hiu v nm chc quy nh ny.6. Bin php an ton cho nhng cng vic
khng nu trong quy nh
ny vn phi thc hin theo Quy trnh k thut an ton in trong cng tc
qun l, vn hnh, sa cha, xy dng ng dy v trm in ban hnh theo quyt nh s
1559 EVN/KTAT ngy 21/10/1999 ca Tng Gim c Tng Cng ty in lc Vit Nam,
Quy phm k thut an ton khai thc thit tr in cc nh my in v li in ban
hnh theo quyt nh s 25 L/KT ngy 22/01/1985 ca B Trng B in lc v cc
quy nh khc v k thut an ton. 7. Trong phn 2 Bin php an ton cho tng
cng vic, phn ch in nghing nu nhng v tai nn lao ng in hnh xy ra ti
cc n v, do cng nhn vi phm quy trnh, khng thc hin v ng cc bin php an
ton khi thc hin cc cng vic QLVH, sa cha li in, th nghim thit b,...
PHN 2 BIN PHP AN TON CHO TNG CNG VIC1. KHI RI TR S I THC HIN CNG
VIC.
1- Khi nhn lnh cng tc, phiu cng tc, phiu thao tc phi c k lnh cng
tc, phiu cng tc, phiu thao tc; nu cha r phi hi li ngi ra lnh. Cc
bin php an ton ghi trong phiu cng tc, lnh cng tc y cha. Ni dung v
trnh t thao tc ghi trong phiu thao tc c g sai khng. Nu pht hin c
nhng sai st phi phn nh ngay vi ngi ra lnh thao tc hoc ngi vit phiu
thao tc. Phi hnh dung c v tr thit b; khu vc lm vic, ni dung cng vic
v trnh t cc cng vic phi lm. 4
2- Phi bit mnh c giao lm vic cng vi nhng ai. Bn thn mnh v nhng
ngi cng lm vic chun b y phng tin bo v c nhn cha. Nu cha th phi thc
hin. 3- C y dng c, trang thit b an ton ph hp vi cng vic. Phi kim
tra khng nh dng c, trang thit b an ton cn tt. 4- Phi hnh dung c ng
i n a im lm vic, i bng phng tin no, c th gp kh khn g. Nu c trc trc
trn ng i, hoc vng mc lc thc hin cng vic th c phng tin thng tin no
thng bo cho ngi ph trch bit v xin kin ch o gii quyt.2. KHI NO C PHP
KHNG THI HNH LNH CA NGI PH TRCH
1-Ngi lao ng c quyn t chi thi hnh lnh sn xut ca ngi ph trch nu
thy rng: thc hin lnh c th s gy ra tai nn cho mnh v ngi khc hoc dn n
s c nghim trng. (B Lut lao ng ) 2-Ngi lao ng c quyn t ri b ni lm
vic nu thy c nguy c s c, tai nn nghim trng xy n cho mnh v mi ngi.
(B Lut lao ng) 3- Ngi lao ng c php khng thi hnh lnh ca ngi ph trch
nu lnh vi phm nhng quy nh an ton hoc nhng quy nh v tiu chun k thut
c kh nng dn n hu qu nghim trng v ngi v ti sn. (Quy trnh k thut an
ton in ) 4- Khi ang lm vic hay ang thao tc ng ct in nu thy nghi ng
c sai st th phi ngng ngay kim tra li. Nu xy ra s c bt ng trong qu
trnh thao tc th cng phi ngng ngay vic thao tc tip v bo co cho ngi
ra lnh bit. 5-Ngi khng thi hnh lnh ca ngi ph trch phi c trch nhim
bo co vi lnh o cp trn c phng n x l, khc phc kp thi.
3. NHNG KHONG CCH AN TON PHI NH
1- Khi tin hnh cng vic, lun phi nh v khng c vi phm cc khong cch
an ton quy nh trong bng sau:
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Cp in p in p t 1kV n 15 kV in p trn 15 kV n 35 kV in p trn 35 kV
n 110 kV in p trn 110kV n 220kV
Khong cch an ton ti thiu 0,7m 1,00m 1,50m 2,50m
Trng hp do yu cu sn xut, khng th ct c in m ngi lm vic c kh nng
vi phm khong cch quy nh nu trn th phi lm ro chn. Khong cch t ro chn
ti phn c in l: Cp in p in p t 1kV n 15 kV in p trn 15 kV n 35 kV in
p trn 35 kV n 110 kV in p trn 110kV n 220kV Khong cch ti thiu t ro
chn ti phn c in 0,35m 0,60m 1,50m 2,50m
Khi lm ro chn hoc khng th lm c ro chn m vn khng ngn nga c s va
chm vo cc vt mang in hoc vi phm khong cch an ton th phi ng k xin ct
in, lm y cc bin php an ton trc khi lm vic. 2-ng dy ang vn hnh ch c
php tro ln ct sn x v phn trn ca ct; g t chim, kim tra dy dn, dy
chng st, mi ni, s v cc ph kin khc khi m bo khong cch nm ngang gia
mp ngoi cng ca thn ct n dy dn gn nht t ti thiu l 1,5m i vi cc cp in
p t 110 kV tr xung, v 2,5m i vi ng dy c in p 220kV. 3- Nhng ngi lm
cng vic ghi mc 2 phi c hun luyn v kim tra t yu cu. Khi lm cc cng
vic ghi mc 2 trn, khng c tip xc vi s cch in, ngi v dng c thi cng
khng c n gn dy dn vi khong cch nh hn khong cch an ton sau: Cp in p
in p t 1kV n 35 kV in p trn 35 kV n 66 kV in p trn 66 kV n 110kV in
p trn 110kV n 220kV Khong cch an ton ti thiu 0,6m 0,80m 1,00m
2,00m
4- Cm lm nhng cng vic ghi mc 2 khi c gi t cp 4 tr ln.
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4. KHI LM VIC TRN CAO
1- Qun o phi gn gng, tay o, ng qun phi bung v ci cc, m bo h phi
c ci quai chc chn xung cm, i giy bo h lao ng (tr khi lm vic thi cng
trn rung bn ly). Cm i dp l (khng c quai hu) hoc i giy inh. Ma rt
cng nhn phi mc m. Lm vic cao t 3 mt tr ln phi eo dy lng an ton d
thi gian lm vic rt ngn. 2- Nu tro ct ly tm phi dng thang 1 dng,
thang 2 dng hoc guc tro chuyn dng, chn tro; Ngi thc hin phi c hun
luyn v thc hnh thnh tho. Cm tro ln ct bng cc dy no ct. 3- Khng lm
vic trn cao khi c ma to nng ht, c gi ti cp 6 (60 70km/gi) hoc c
ging st, thiu nh sng. 4- Cm tung nm dng c, vt liu. Ngoi dy thng thi
cng mi v tr lm trn cao cn c dy thng nilng 8 ph hp vi chiu cao ca ct
chng buc hoc nng h cc vt t, dng c nh, nh. Vt nng phi dng puly v
thng thi cng ko ln hoc h xung. 5- Cm ung ru, ung bia trc v trong lc
lm vic. Cm ht thuc trong lc lm vic. 6- Kim tra dy lng an ton v
thang di ng cng nh gin gio trc khi dng. Cc dng c nh cm tay phi cha
trong ti ng dng c c np y. Dao cht cy, ca st, m lt, ba tay,...phi c
dy buc chng vo c tay khi thao tc. 7- Cm mc dy lng an ton vo thang
di ng hay cc vt khng chc chn nh ng mng, chn song ca, lan can... 8-
Khng cht qu ti hay tp trung ng ngi ti mt ch trn gin gio. Khng mang
vc vt nng khi tro ln bng thang. Phi c ngi gi chn thang trong lc tro
ln, tro xung hoc buc chc ngn thang vo vt c nh. 9- Phi c ro chn, bin
bo v ngi cnh gii pha di. Ngi ph vic di t phi i m nha BHL v khng c
ng, lm vic trong khu vc m dng c thi cng c th ri t trn cao xung.
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5. KHI TRO LN CT IN.
Ch tro ln ct in lm vic khi: 1-C phiu cng tc hoc lnh cng tc v nm
vng ni dung cng vic phi lm; cc bin php an ton c thc hin y . 2- Sc
kho m bo; khng b mt mi, hoa mt, chng mt, nhc u... v phi c cc phng
tin bo v c nhn nh m, qun o, giy BHL, guc tro ct in, dy lng an ton
v.v... 3- Khi lm vic trn li c ct in phi bit chc chn khu vc lm vic
hon ton ht in, cc bin php k thut an ton cn thit c thc hin. 4- C ngi
s dng y trang b BHL ng di gim st, sn sng tr gip nhc nh trong sut qu
trnh lm vic. 5- Nu s dng guc tro ct chuyn dng th phi c hun luyn v
kim tra st hch t yu cu v tro cao bng guc tro chuyn dng. 6- Nu tro
ln ct bng thang di ng, phi s dng thang ng tiu chun k thut v phi c
ngi gi chn thang khi tro.6. KHI THU HI DY DN C, CNG DY MI.
xy ra nhng tai nn lao ng nng v tai nn cht ngi v ngi lao ng khng
hiu bit hoc c tnh vi phm nhng quy nh an ton cho cng vic ny. C th:
*Ti Tuyn quang: Nm 1999, khi di chuyn tuyn dy h th; Do ct khng c hm
gi, m tranh th o tr mng ct, li qua m ma. Sng hm sau, khng thc hin
chng no hm ct, Ngi ph trch lnh cho Cng nhn ln tho d thu hi dy ng
trc v hm cng t, hu qu ct do lt mng, ko theo ct cui gy, cng nhn lm
vic trn ct b ng, hu qu l mt ngi cht, ba ngi b thng. *Ti Thi nguyn:
Nm 2000, cng nhn ca XN C in vt t khi thu hi dy c, do khng kim tra
tnh trng ct yu sn, li khng chng no hm gi ct, x; cng khng hm gi dy c
dng km cng lc ct dy. Hu qu ct , mt cng nhn b gy xng b vai, rn xng c
t s 5. *Ti L Yn Bi: Nm 2004, nhm cng tc ri cng dy mi, khi x l dy
vng trn mt t, do cng nhn ng gc trong ca dy nn khi
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dy c ko cng gt cng nhn ng v b gy xng cng tay, trt khp khuu tay,
chn thng ct sng. *Ti in lc Bc Ninh (nm 2001), khi tho h dy ng dy 10
kV, dy dn chm ng dy 0,4kV pha di, cng nhn b in 0,4kV git gy t vong.
V th, m bo tuyt i an ton khi thu hi dy c, cng dy mi; phi thc hin ng
cc quy nh sau: 1- Phi c phiu cng tc. Thc hin y cc bin php an ton
trong phng n c duyt, c bit phi ct in, kim tra khng cn in bng bt th
in c cp in p ph hp, lm y cc b tip a theo quy nh. Phi ct in tt c cc
ng dy giao cho i di ng dy cn thu hi hoc ko dy mi. 2- Phi kim tra
tnh trng ct, x, s; phi chng no, hm gi ct, x, dy dn trc khi ct dy
hoc cng dy ly vng. 3-Trong ton b chiu di khong dy cn thu hi, phi
tho dy buc c s hoc a dy ra khi mng dy, gc dy dn ln x hay t vo rnh
puly. 4-Nu c ng dy r nhnh ni vi on dy cn thu hi nh cp muy-le vo hm
cng t, nhnh r cao th v.v...cng phi c tho b trc khi thu hi dy. 5-Trc
khi ct dy c, phi dng cp thp hoc thng ni lng di hn chiu cao ct hm
gi, ko dy vo pha x mnh ang ngi, ct dy bng dng c chuyn dng ri nh dy
hm h t t dy dn c xung t. 6-Trng hp ri dy mi trn mt t bng phng php
th cng, ngi c giao nhim v i x l dy dn b vng, b chp phi i pha gc
ngoi ca dy dn v phi ng v tr chc chn trc khi x l. 7- Trng hp cng dy
mi v ly vng (k c trng hp ly dy dn c lm dy mi ko rt dy mi). Ti mi v
tr ct phi c 01 puly, khi a dy dn vo puly, trc khi ly vng phi ni t
hai u khong dy cn ly vng ngn nga in p cm ng v in p st.7. KHI I KIM
TRA, X L S C NG DY, THIT B IN
* xy ra rt nhiu v tai nn thng tm do phi hp khng ng b, thiu cht
ch gia Ngi ch huy trc tip v cc thnh vin, cng nh 9
gia cc thnh vin trong nhm kim tra, x l s c ng dy vi nhau. Hy tng
cng kim tra gim st ln nhau sut dc tuyn dy, trong sut qu trnh lm
vic. Khng c tin hnh cng vic mt mnh; phi c ngi bn cnh gim st nhc nh,
tr gip v sn sng ng cu. *Nm 1996, cng nhn bc 5/7 ca L Thi Bnh khi i
kim tra s c vo nhm TBA (tro qua tng ro vo trm), vi phm khong cch an
ton b in 10kV phng gy bng nng. *Ti chi nhnh in Xn Mn L H Giang (nm
2005) khi c giao i kim tra ng dy v cng a phng lp bin bn s c. n a im
cng tc, k thut vin v cng nhn khng bo co vi lnh o chi nhnh a ra phng
n x l khi khng thc hin cc bin php an ton cn thit, gy ra tai nn lao
ng nng. V vy khi i kim tra, x l s c ng dy, thit b in cn phi thc hin
cc bin php an ton sau: 1-Khi nhn nhim v i kim tra s c ng dy hay
thit b in, phi c phiu cng tc hoc lnh cng tc. Phi c k ni dung phiu
cng tc, lnh cng tc bit c khu vc v cc c im ca i tng mnh phi kim tra.
2-Nu ch kim tra ng dy, thit b in bng mt th phi bit v khong cch an
ton in v tuyt i khng c vi phm, khng c tro ln ct in, tr hay gi thit
b. Phi phng in p bc trong trng hp pht hin c s c chm t mt pha. 3-Nu
kim tra pht hin s c phi x l lun th phi c t hai ngi tr ln, phi c ngi
ph trch v gim st. 4-Ngi ph trch cng vic phi tp trung s ngi c tn
trong phiu ph bin ni dung cng vic, cc bin php an ton; kim tra trang
b an ton v giao vic km theo cc bin php an ton c th. 5-Phi thc hin
cc bin php an ton theo phiu cng tc: ct in, th bt kim tra ht in v lm
tip a di ng. Ch c php ra lnh cho mi ngi bt u lm vic khi thc hin y
cc bin php an ton ghi trong phiu cng tc v c ngi trc tip qun l vn
hnh cho php. 6-Khi kt thc cng vic, Ngi ph trch cng vic phi tp trung
qun s, thu gom ht dng c, vt t, vt liu; tho cc b tip a lm, thng bo
cho tt c mi ngi trong nhm cng tc bit kt thc cng vic, cm mi ngi ri
khi ni tp trung trc khi mnh quay tr li
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thng bo hon tt th tc kho phiu cng tc v bn giao li khu vc lm vic
cho ngi qun l vn hnh. 7-Ngi ph trch cng vic (Ngi lnh o cng vic, Ngi
ch huy trc tip) hoc ngi gim st an ton in (chu trch nhim nhn, bn
giao ni lm vic) phi c trch nhim kim tra ton b khu vc thi cng trc
khi chnh thc bn giao li li in cho ngi qun l vn hnh.
8. KHI CHT CY DN HNH LANG TUYN
*Ti in lc Ho Bnh (nm 2004) khi cht cy pht quang hnh lang tuyn,
do khng c dy bo him nn khi cht cnh xong, trong lc di chuyn xung cng
nhn b trt chn v ng t cao 5,02 m gy t vong do rn nt hp s vng trn.
*Ti in lc Thanh Ho (nm 2005), khi cht cy ngoi hnh lang, do khng b
tr cnh gii t u, cu ngi ngoi vo khu vc lm vic khi b cy vo cng nhn
phi vo khu vc nguy him khi cy ang v b cy vo ngi gy TNL nh. V vy khi
cht cy pht quang hnh lang tuyn phi thc hin cc bin php an ton sau:
1- Phi c phiu cng tc, ngi thc hin cht cy ta cnh phi c hun luyn v
cng tc ny. Tng v tr, cung on cng tc phi c phng n x l c th c Trng,
Ph chi nhnh, i trng (nu c u quyn) ph duyt. 2-i vi nhng v tr c kh
nng cnh cy, thn cy nghing hoc ri vo ng dy th nht thit phi xin ct
in, th bt kim tra ht in, lm tip a hai u on ng dy trc khi tin hnh
cht h cy. 3-Khi tro ln cy nu khng m bo chc chn an ton th phi dng
thang v c dy bo him. Dy bo him l thng (hoc ni long) mm ng knh t
10mm n 12mm; nm dy vt qua mt chc cy chc chn gn v tr cnh cy phi ca,
cht. Buc mt u dy vo tht lng an ton, u kia c ngi hm gi. 4- Khng c
tro ln cy cht cnh nu trc c ma, thn cy t, trn. Khi tri ti hoc c
ging, gi t cp 4 tr ln; lc tri ang ma to khng c tro ln cy cht
cnh.
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5-Trc khi cht h cc cy trong hnh lang li in c chiu cao ln hn hoc
bng khong cch t gc cy ti pha ngoi ca ng dy bt buc phi thc hin chng
no, hm gi sao cho cy c xu hng ng ra pha ngoi, khng vo ng dy. Phi
dng t nht hai dy no hm c chiu di ln khi cy , cnh cy khng qut vo ngi
ng ko hm. Dy no phi buc trc khi bt u cht cy. Cm tro ln cy trong lc
ang cht cy hoc ca d dang. 6- Cm cht cy theo cch cho cy n vo cy kia.
Khi h cy bng ca, trc ht phi cht ngang 1/4 thn cy v pha cy s , cm
cht cy hai hoc ba pha. Khi ca, phi ca pha i din vi pha cht trn mc
ming cht v ch ca n v tr cch ming cht t 2cm n 3cm th dng li. Nu lc
cy cha bt u th phi ng chn nm vo mch ca. 7- Phi b tr ngi cnh gii hoc
lm ro chn ngn ngi khng c nhim v i vo khu vc cy . 8- Cc dng c dng
cht h nh dao, ru, ca...khi dng trn cao phi c mt on dy mm, chc di
khong 0,6 mt n 1 mt buc chc chn vo cn ca chng, mt u buc vi c tay
ngi s dng phng dng c ri vng xung nhng ngi lm pha di. Xem thm mc khi
lm vic trn cao trong Qui trnh KTAT in trong cng tc qun l, vn hnh,
sa cha, xy dng ng dy v trm in ban hnh theo quyt nh s 1559 EVN/KTAT
ngy 21/10/1999 ca Tng Gim c Tng Cng ty in lc Vit Nam .9. NGI I CA
VN HNH CN BIT
*Cng nhn bc cao, trc trm trung gian 35kV/10kV thuc in lc Thi Bnh
(nm 2004) v cng nhn trc trm 110kV thuc X nghip in cao th min Bc (nm
2005) khi i kim tra thit b t mt mnh m ca li v m ca t bung phn phi,
khng c ngi gim st, vi phm khong cch an ton b in cao th phng gy t
vong. V vy ngi i ca vn hnh phi nh: 1- Khng c mt mnh thc hin thao tc
ng, ct thit b in cao p d l k s hay cng nhn bc cao.
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2-Khi i kim tra thit b hoc ghi ch ng h o m in mt mnh khng c vt
qua ro chn, m ca li v ca t bung thit b phn phi hoc t sa cha thit b.
Trng hp phi m ca li hoc ca t phn phi nht thit phi c ngi gim st v
phi c phiu cng tc. 3-Khng c trc vn hnh in lin hai ca lin tc hoc trc
qua m ri hm sau li tham gia lm cc cng vic khc (nh tham gia vo nhm v
sinh thit b hay x l s c ng dy cao th,...). 4- Khng c ng; lm vic
ring nh: c bo, c truyn hoc xem ti-vi trong lc trc. Khng c ri khi v
tr trc ca khi cha c s ng ca cn b lnh o v cha c ngi thay th. 5-Phi
ghi chp y thng s vn hnh; cp nht cc thng tin, tnh hnh vn hnh trong
ca vo cc s theo quy nh. 6-C trch nhim bo qun tt cc trang b dng c an
ton, dng c PCCC, thit b thng tin...phc v vn hnh. 7- Phi c v hiu s
ni dy mt si, nguyn l lm vic, tnh nng, thng s k thut cc thit b do
mnh qun l vn hnh. trnh c sai st d dn n s c hoc tai nn lao ng. 8-
Nghim chnh chp hnh mnh lnh ch huy ca K s iu hnh li in cp trn trc
tip.10. KHI THC HIN TH NGHIM CC THIT B IN
*Nm 2003, ti TBA 110kV K Anh H Tnh, khi tch my bin p T1 ra th
nghim nh k, do khng nm c thanh ci C31 vn c cp in t trm E18.1 phc v
th nghim, cng nhn vi phm khong cch an ton b in 35kV phng gy bng
nng. *Nm 2004, khi Trung tm th nghim in tin hnh th nghim thit b TBA
110kV Gia Sng, do khng thc hin y cc bin php an ton, khng nm chc
nhng phn t cn mang in, mt cng nhn ca TBA Gia Sng v mt k s ca TTTN
in vi phm khong cch an ton b in 6kV phng gy t vong ti ch mt ngi, mt
ngi bng nng v t vong trong qu trnh iu tr. V vy khi th nghim cc thit
b in cn phi thc hin cc bin php an ton sau y: 13
1- Nhn vin th nghim chun b y h s k thut, s ni in nht th, nh th;
nm vng s kt dy, thng s k thut v c im thit b c phng n t chc sn xut m
bo an ton. Phng n ny phi c n v trc tip qun l vn hnh kim tra v duyt.
2- Th nghim thit b in cao p phi c phiu cng tc. Nhm cng tc phi c t
hai ngi tr ln. Nhm trng phi c t bc 4/5 an ton in tr ln. Phi s dng
trang b BHL c nhn. Ton b nhn vin i cng tc phi nm chc khu vc c php
lm vic, khu vc v nhng phn t vn c in v phi thc hin theo bin php an
ton c duyt. 3- Ti khu vc c nh chuyn th nghim cao p phi c bung th c
tng ro, vch ngn, ca ra vo nhng khng c hn ch tm nhn t bn iu khin nhn
vo. Bn iu khin thit b th nghim phi ngoi bung th, ring thit b to in
p cao phi trong bung th, nhng phi c ro ngn cch vi cc dng c, thit b
khc cng nh cc vt cn th nghim. 4- C thit b ng ct ngun in h th cp cho
cc thit b th nghim. C gng, so, ng, thm cch in, cc loi bin bo an ton
in v cc b tip a theo quy nh an ton. 5-Ca ra vo bung th cao p phi c
cng tc an ton lin ng: - Khi ca ng: n trong hp bin bo Cm vo c in cao
th nguy him cht ngi v bin bo ang th cao th phi sng; ng thi lc mi ng
c ngun h th cp cho cc thit b th nghim. - Khi m ca: thit b cp in
ngun cho bn th nghim s t ng ct .ng thi c tn hiu chung ku, ci bo v n
trc li vo bung th sng nhp nhy. Ai ch ng mun vo trong bung th, bt
buc phi n nt gii tr tn hiu n, ci, chung. 6- Phi thc hin ni t tt c
cc chi tit bng kim loi ca thit b, dng c, gi treo, gi , ca li v.v .
. c trong bung th cao p. 7- Khi th nghim cao p lu ng phi mang theo
ro chn, bin bo an ton. Nu dng dy thng cng lm ro chn tm thi, th phi
treo trn dy thng v cc pha nhng bin bo Cm vo, c in cao p nguy him
cht ngi.
14
8- Dng cu dao hoc cm ng, ct ngun in th nghim; cu dao phi l loi
hai cc v c chi tit chng ng nhm hoc do li dao sp, v tnh ng in hoc do
chn ng, va chm no ngoi mun. Phi c mt ngi ph trch vic ng, ct ngun in
phc v th nghim. 9-Trc khi ra lnh ng in th, ngi ph trch phi kim tra
ton b mch u dy th nghim, cc bin php an ton v khng ngi no ng trong
khu vc th cao p. Ch khi no thy an ton mi h to lnh ng. 10- Khi th
xong, phi h to lnh "ct in". Sau khi ct ngun in th nghim, phi dng so
cch in c ni sn dy ni t kh in tch trn thit b ri mi c bc vo khu vc th
tho dy thay vt th khc hoc kt thc cng vic. 11- Khi th nghim cp lc,
nhn vin th nghim phi xc nh ng tuyn cp v phi c ngi trng coi u cp.11.
KHI N GN, LM VIC GN THIT B IN.
*Nm 2000, mt k s in thuc Trung tm t vn xy dng Cng ty L1 dng thc
st o khong cch khi kho st thit k ti trm u Lu Yn Bi, thc st bt ln,
vi phm khong cch an ton b in 35kV phng gy tai nn. *Nm 2002, cng nhn
bc 5/7 ca L Lng Sn vo trm o m ranh gii gia L Bc Giang v L Lng Sn
(Trm do L Bc Giang qun l vn hnh), tro ln gi TU ghi thng s TU, vi
phm khong cch an ton b in 35kV phng gy bng nng. *Nm 2002, cng nhn
bc 5/7 ca L Yn Bi (khng phi nhn vin nhm cng tc) tro ln sn thao tc
trm treo xem nhm cng nhn sa cha MBA , do vi phm khong cch an ton nn
b in 35kV phng gy bng nng. Khi n gn hoc lm vic gn thit b in phi thc
hin cc bin php an ton sau y: 1-Ch c n gn thit b in khi bit c thit b
in cp in p no v hy nh khng c vi phm khong cch an ton in cc cp in p
nh sau: -in h p: khng nh hn 0,3m. -in p t 1kV n 15kV: khng nh hn
0,7m. -in p t trn 15kV n 35kV: khng nh hn 1,0m -in p t trn 35kV n
110kV: khng nh hn 1,5m. 15
-in p t trn 110kV n 220kV: khng nh hn 2,5m. 2-Cch phn bit cc cp
in p theo kch thc v s lng s ca DK nh sau: - Cch in ng c chiu cao ln
hn 350mm hoc chui cch in c t 3 n 4 bt cch in l in p 35 kV. Cch in
ng c chiu cao nh hn 350mm hoc mi chui cch in c t hn 3 bt cch in l
DK in p nh hn 35kV. - Mi chui cch in c t 6 bt cch in tr ln l DK in
p 110 kV v ln hn. 3- Khng c dng tay s m vo cc vt, cc chi tit trong
Trm in, bung phn phi in; khng s dng cc thc bng kim loi c chiu di hn
0,5m lm vic gn cc thit b in.12. LP T TIP A 3 PHA DI NG
Tn gi tip a hay tip t l nh nhau, tu thuc thi quen thng gi ca
CBCNV tng ni. *Nm 1996 cng nhn bc 2/7 ca L Ninh Bnh i x l s c sau
bo, khi tro ln ct lm tip a di ng, khng th bt kim tra ht in, b in
35kV phng gy bng nng. *Nm 2001 cng nhn sa cha in bc 3/7 ca L Thi
Bnh khi lm tip a di ng trn ng dy 976 b in ca ng dy 973 i chung ct
phng, b ng v bng nng. V vy khi lp t tip a 3 pha di ng phi thc hin
cc bin php an ton v cc nguyn tc sau: 1- Phi c hai ngi thc hin theo
phiu cng tc. Mt ngi c bc 3/5 an ton in tr ln trc tip thao tc; mt
ngi bc 4/5 an ton in tr ln gim st. 2-Ngi trc tip thao tc phi mang
trang b bo v c nhn, nht thit phi c gng cch in, so cch in, bt th in
c cp in p tng ng. 3-Tip a phi t v pha c kh nng dn in n. t tip a v
tr no bt buc phi dng bt th in p (c cp in p tng ng) kim tra ht in ti
v tr . 4-Trn ng trc ca DK v ng dy cp ngm bt buc phi lp tip a c hai
u. Nu DK di qu 2 km phi lm thm 1 b gia. 16
5-i vi ng trc, ngoi cc b tip t t ti hai u, cc nhnh r nu khng ct
c cu dao cch ly u nhnh th bt buc phi t tip a u nhnh, nu nhnh r di
khng qu 200m cho php khng cn t tip a u nhnh nhng bt buc phi ct ht
thit b ng ct h p, kho t h p; ct v kho tay thao tc b truyn ng ca cu
dao hoc tho ton b cc ng ch ca cu ch SI xung cc my bin p phn phi
thuc nhnh r . Cc nhnh r khc u phi t tip a ti u nhnh. 6-Khi lm vic
khu vc nhnh r, nu nhnh r di khng qu 200m, cho php lm mt b tip a chn
u ngun n nhng phi ct cu dao cch ly t ng dy xung cc MBA phn phi.
7-Vi cc DK i chung ct vn hnh song song, giao cho: mt ng ct in, mt
ng vn hnh th ti DK ct in v c ngi lm vic phi t cc b tip a di ng cch
nhau khng qu 500m. Cng rt ngn khong cch gia cc b tip a th cng an
ton. 8-Trong qu trnh lp t tip a di ng, khng c dy tip a chm vo ngi.
Khng c php u chp cc dy pha m khng ni t. 9-Nu khng c dy hoc cc tip t
ct in ti v tr t tip a, phi dng cc st trn hoc thp gc di 1,0m ng ngp
xung t bt u tip t ca b tip a. Phi m bo cc u kp ca b tip a c bt chc
chn, tip xc tt m bo dn in tt t dy ni t ti cc tip t. 10-Khi t tip a
di ng phi lp u tip t trc, bt bng bu lng, khng c vn xon; cc u ni vo
dy dn lp sau. Khi tho tip a th lm ngc li: Tho ln lt cc u ni vo dy
dn ca ng dy trc, u u vo tip t tho sau.13. KHI LM VIC TI THIT B
IN.
*Nm 1996, cng nhn vn hnh bc 6/7 ca L Ho Bnh khi tin hnh v sinh s
cu dao 35kV, do vi phm khong cch an ton b in 35kV phng gy t vong.
*Nm 2000, cng nhn QLVH bc 5/7 ca L H Ty khi v sinh cu dao trm trung
gian vi phm khong cch an ton v b in 35kV phng gy t vong. *Nm 2003,
khi ct in MBA T1 trm V Cng L Bc Ninh th nghim nh k, trm kt hp lm v
sinh v sn mt s thit b trm , sau khi gim st cho cng nhn sn li cu dao
331-1( cu dao 331-1 ct 17
v tip a mt pha, m kia ca dao vn c in) v cho cng nhn ngh, trm
trng trm V Cng L Bc Ninh mt mnh vo trm v tro ln cu dao 331-1, vi
phm khong cch an ton b in 35kV phng gy t vong. V vy khi lm vic ti
cc thit b in phi thc hin cc bin php an ton sau: 1-Phi c phiu cng
tc, trong c bit quan trng l cc bin php an ton: ct ht in, lm tip a
ngn chn in dn n ch lm vic, treo cc bin bo theo quy nh. 2-Khng c lm
bt c vic g ti cu dao cch ly, cu ch t ri, my ngt in, my bin p
v.v...khi mt u cc pha bn kia ca thit b cn in. 3-Ch bt tay vo lm vic
khi thy thit b hon ton ht in: nhn thy cc cu dao dn in n b ct ra; c
cc b tip a chn ht cc pha c kh nng dn in n ch lm vic; ti thit b c
treo bin cho php lm vic ti y v sau khi nhn vin qun l vn hnh thit b
cho php lm vic.14. THAO TC NG, CT IN
1-Phi c phiu thao tc. Thao tc phi c hai ngi: Mt ngi gim st c
phiu v mt ngi trc tip thao tc. Ngi gim st phi c bc an ton in t bc
4/5 tr ln, ngi thao tc phi c bc an ton in 3/5 tr ln. Khi n v tr
thao tc phi kim tra k thit b v ni thao tc mt ln na. Khng c php thao
tc mt mnh, k c nhn vin trc Trm in c trnh chuyn mn cao. 2-Phi s dng
gng, so, ng cch in hoc ng trn gh, thm cch in m bo an ton. 3-Phi lun
coi thit b l ang c in nguy him. 4-Khi tri ma to, nc ma chy thnh dng
trn dng c khng c thao tc ngoi tri. 5-Trong trng hp cn thit, nhng ng
dy khng c in cho php thao tc cu dao khi tri ma ging. 18
15. CT CU DAO CCH LY
Nh mc Thao tc ng, ct in v thm: 1-Phi kim tra tn gi, s th t, k
hiu, v tr cu dao nh ct xem c ng theo phiu thao tc hay khng. 2-Trc
khi ct dao cch ly phi kim tra ht dng in qua dao bng cc cch sau:
*Kim tra my ct ni tip vi dao v tr ct tt c 3 pha. *ng h Am-pe ca mch
c cu dao ch 0 . *Th bt kim tra ht in (tr cc trng hp thao tc cu dao
c in khng ti hoc c dng in in dung ca ng dy hay dng in khng ti ca my
bin p c quy nh). Nu ct dao cch ly c dng in ti s xy ra s c ln v tai
nn. 3-Khi ct cu dao c 3 pha ring bit (khng phi loi cu dao lin ng)
hoc cu ch t ri phi ct theo th t ct pha gia trc ri ct hai pha bn
sau.16. NG CU DAO CCH LY
Nh mc Thao tc ng, ct in v thm: 1- Kim tra tn gi, s th t, k hiu,
v tr cu dao cch ly nh ng xem c ng theo phiu thao tc hay khng. 2-
Khi ng cu dao cch ly c 3 pha ring bit (khng phi loi CD lin ng) hoc
cu ch t ri phi ng theo th t: ng hai pha bn trc ri mi ng pha gia
sau.17. CT MY NGT IN
Nh mc Thao tc ng, ngt in v thm: 1-Kim tra tn gi, s th t, k hiu
ca my ngt sp ct xem c ng theo phiu thao tc hay khng. 2- Trong trng
hp ct s c cng phi xc nh chnh xc tn my ngt s ct v phi ghi vo s Nht k
vn hnh. 3-Khng c ch cn c vo tn hiu n hoc c cu ch th v tr khng nh my
ngt v tr ct tt m phi xem cc ng h bo dng in ca mch c cp qua my ngt
ch 0 . Nu ct my ngt bng kho iu khin th hy thao tc ct my ngt mt ln
na bng nt ct c kh ti my ngt. 19
4-Sau khi ct my ngt phi ct ngun in cp cho mch iu khin my ngt (tr
cc trng hp ct in do sa thi ph ti) v treo bin Cm ng in ti kho iu
khin my ngt hoc ti ca t my ngt hp b.18. NG MY NGT IN
Nh mc Thao tc ng, ct in v thm: 1-Nu ct in sa cha ng dy, thit b
th cn kim tra ln cui xem ng dy hay thit b sp c ng in vo c cn ngi lm
vic khng. C bao nhiu nhm cng tc lin quan, tip a c thu hi ht cha? Cc
nhm cng tc tr ht phiu cng tc v rt ht ngi cha? 2-ng dy hay thit b sp
c ng in vo tho mn cc tiu chun k thut cha? Nu ng my ngt in th c xy
ra phi ng b khng? 3-Kim tra tn gi, s th t, k hiu ca my ngt sp ng
xem c ng theo phiu thao tc hay khng.19. KO MY NGT IN HP B RA V TR
TH NGHIM
Nh mc Thao tc ng, ct in v thm: 1-Kim tra tn gi, s th t, k hiu ca
my ngt sp ko ra xem c ng theo phiu thao tc hay khng. 2-Kim tra chc
chn my ngt ct tt c 3 pha bng cc cch: *Tn hiu n bo my ngt ct. *ng h
Am-pe ca mch c my ngt ch 0 . *Th ct my ngt mt ln na bng nt ct c kh
ngay ti my ngt. *Ci ch trng thi my ngt bng c kh phi v tr bo my ngt
ct. 3- Sau khi a my ngt ra v tr th nghim phi ct v tho gic u cp cp
ngun cho mch iu khin my ngt; ng v kho t hp b my ngt; treo bin cm ng
in ti t my ngt. *Nm 2002, hai cng nhn vn hnh trm 110kV, bc th 5/5
ko my ct 600 trm 110kV Vit Tr ra v tr sa cha trong khi my ct ang v
tr ng (khng kim tra trng thi my ct trc khi thc hin), khng mang
trang b an ton; gy s c v b bng nng do h quang in.
20
20. A MY NGT IN HP B T V TR TH NGHIM VO V TR CNG TC
Nh mc Thao tc ng, ct in v thm: 1- Kim tra tn gi, s th t, k hiu
ca my ngt sp a vo xem c ng theo phiu thao tc hay khng. 2- Ni gic cp
ngun cho mch iu khin my ngt (nu trc ct ra). Phi kim tra chc chn my
ngt ct tt c 3 pha bng cc cch: *Tn hiu n bo my ngt ct. *Th ct my ngt
mt ln na bng nt ct c kh ngay ti my ngt. *Ci ch trng thi my ngt bng
c kh phi v tr bo my ngt ct. 3- Kim tra trng thi dao tip t ca t hp
b; ct dao tip t c nh ti t my ngt (nu dao ny ang v tr ng). 4- a my
ngt vo v tr cng tc.21. CT V KO MY NGT IN HP B T V TR CNG TC RA V TR
SA CHA
Nh mc Thao tc ng, ct in v thm: 1-Kim tra tn gi, s th t, k hiu ca
my ngt s ct v ko ra v tr sa cha xem c ng theo phiu thao tc hay
khng. 2- Ct my ngt in. Kim tra chc chn my ngt ct tt c 3 pha bng cc
cch: *Tn hiu n bo my ngt ct. *ng h Am-pe ca mch c my ngt ch 0 . *Th
ct my ngt mt ln na bng nt ct c kh ngay ti my ngt. *Ci ch trng thi
my ngt bng c kh phi v tr bo my ngt ct. 3- Ko my ngt ra v tr th
nghim. 4- Ct v tho gic u cp cp ngun cho mch iu khin my ngt 5- i vi
cc loi my ngt c ng, ct nh nng lng c tch sn ca c cu tch nng th phi
gii phng nng lng ca c cu tch nng (sau khi my ngt v tr th nghim v
tho gic u cp cp ngun iu khin my ngt) bng cch:
21
*Thc hin thao tc ng my ct bng nt ng c kh, sau thc hin ct my ngt
bng nt ct c kh. *Quan st c bo c cu tch nng ca my ngt bo c gii phng
ht nng lng. 6- Sau khi tho gic cp ngun iu khin, thc hin gii phng ht
nng lng ca c cu tch nng mi c a my ngt ra v tr sa cha. 7- ng v kho
ca t hp b my ngt.22. A MY NGT IN HP B T V TR SA CHA VO V TR CNG
TC
Nh mc Thao tc ng, ct in v thm: 1- Kim tra tn gi, s th t, k hiu
ca my ngt sp a vo xem c ng theo phiu thao tc hay khng. 2- Kim tra
chc chn my ngt ct tt c 3 pha ng thi c cu tch nng c gii phng ht nng
lng bng cc cch: *Th ct my ngt mt ln na bng nt ct c kh ngay ti my
ngt. *Ci ch trng thi my ngt bng c kh phi v tr bo my ngt ct. *C bo c
cu tch nng ca my ngt bo c gii phng ht nng lng. 3- Kim tra trng thi
dao tip t ca t hp b; ct dao tip t c nh ti t my ngt (nu dao ny ang v
tr ng). 4- a my ngt vo v tr th nghim. 5- Ni gic u cp cp ngun cho
mch iu khin my ngt. 6- a my ngt vo v tr cng tc. 7- ng v kho ca t hp
b my ngt.23. THAY DY CHY CU CH PHA CAO P CA MY BIN P
Nh mc Thao tc ng, ct in v thm: 1- Ct ht ph ti pha h p (ct cc my
ngt, cu dao, p t mt nhnh v tng) v kho ca t phn phi h p li. Sau ct
cu dao cch ly pha cao p ca MBA.(Theo th t c th ghi trong phiu thao
tc). 22
2- Dng bt th in c cp in p tng ng kim tra ht in 2 pha ca c 3 ng
ch cao p. Sau lm mt b tip a ti thanh dn ni t dao cch ly cao p n cc
u cc trn ca ng ch; mt b ti 3 u cc cao p ca MBA (Nu pha h p c cc l
ra c ng ct bng cu dao, nhn r khong cch ct; t phn phi h p kha v treo
bin cm ng in c ngi ang lm vic th khng phi lm b tip a ti cc cao p ca
MBA). 3- Ch sau khi lm xong cc b tip a nh mc 2, mi c tho tng ng ch
xung kim tra, thay th. Nu cu dao pha cao p ca MBA l loi n pha hoc 3
pha lin ng li dao chm ngang, kho c tay thao tc v m bo khong cch an
ton ti thiu th khi tin hnh tho ng ch cho php khng cn t tip a di ng
ti thanh dn ni t dao cch ly n cc u cc trn ca ng ch. 4-Sau khi lp cc
dy ch hoc ng ch K vo v tr c, ln lt tho b b tip a u cc MBA, ri n b
pha di dao cch ly n cc u cc trn ng ch , kim tra li ln cui v thao tc
ng in li cho MBA. c nhiu trng hp do khng lm ng cc quy nh trn nn b
tai nn lao ng. *Nm 1998, cng nhn QLVH bc 6/7 ca L H Ty v cng nhn bc
2/7 ca L Ngh An, tin hnh thay dy chy ca cu ch pha 35kV ca MBA phn
phi, do cng nhn khng tin hnh ct cu dao 35kV xung MBA, cn mt pha ch
khng ct, khi lm vic khng c ngi gim st b in 35kV phng gy bng nng.
*Nm 2000 ti L H Ty xy ra mt v tai nn lao ng tng t.
24. THAY DY CH CA CU CH T RI CA MY BIN P
Cu ch SI (cu ch FCO) cn gi l cu ch t ri, v khi n t dy ch ca pha
no th ng ch ca pha y t ng ngt ra. Nh mc Thao tc ng, ct in v thm: 1-
Ct ht ph ti pha h p (ct cc my ngt, cu dao, p t mt nhnh v tng), kho
t phn phi h p li. Sau ct c 3 pha cu ch t ri ca MBA (Theo th t ghi c
th trong phiu thao tc). Lun nh rng 3 m hm trn cu ch vn cn in cao p.
2- Phi dng so thao tc chuyn dng tho ng ch t ri b hng ra khi ngm di
ca cu ch. Thc hin thay dy ch mi cng thng s k thut, chnh ng cng cn
thit ri dng so thao tc lp tr li ng ch SI. 23
3-Nu v l do no khng ct c cc ng ch, khng tho ng ch ra khi ngm di
c, hoc khng ng c cu ch t ri (mc d chnh ng cng cn thit) phi bo co
cho ngi Ph trch cng tc bit c bin php x l. Khng c t sa cha khi cha c
lnh v cha c phiu cng tc km theo cc bin php an ton bt buc. c nhiu
trng hp b tai nn khi t sa cha cu ch t ri b kt do khng c bin php an
ton c th cho cng vic ny. *Nm 1999 cng nhn QLVH bc 6/7 ca L H Tnh v
cng nhn bc 3/7 ca L Ngh An dng tay tho ng ch ca cu ch t ri trong
khi ngm trn cu ch vn ang cn in, vi phm khong cch an ton b in cao th
phng gy bng nng.25. SA CHA CU CH T RI CA MY BIN P
m bo an ton, phi thc hin y cc bin php an ton c th nh sau: 1- Phi
c phiu cng tc v phi c t nht hai ngi thc hin. 2- Phi ct ht ph ti pha
h p (ct cc my ngt, cu dao, p t mt nhnh v tng). Phi ct my ngt hoc cu
dao phn on u ngun, kho tay thao tc cu dao cch ly. Dng bt th in c cp
in p tng ng, kim tra ht in, lm tip a ti u nhnh r vo trm hoc ti ct k
vi trm; nu cn th tch lo ng li in cho cc ph ti khc, hn ch thi gian
ct in ton tuyn. 3- Dng bt th in c cp in p tng ng, kim tra ht in v
lm mt b tip a ti 3 u cc cao th ca MBA. ng thi kim tra thit b ng ct
h p ( ct ht cc my ngt, p-t-mt v cu dao ca ph ti pha h p); kho ca t
phn phi h p li (Nu pha h p c cc l ra c ng ct bng cu dao, nhn r
khong cch ct; t h th kha v treo bin cm ng in c ngi ang lm vic th
khng phi lm b tip a ti cc cao p ca MBA). 4- Ch sau khi lm xong nhng
vic nu mc 2 v mc 3, mi c tro ln x l; tho tng ng ch xung kim tra,
thay dy ch hng, sa cha v cn chnh li ton b cc pha ca cu ch. 5- Tun
th cc bin php an ton khi lm vic trn cao.
24
6- Sau khi sa cha xong, ln lt tho b b tip a u cc MBA, ri n b pha
ng dy n trm. Lm th tc kho phiu cng tc v ng in tr li.
26. THAY CCH IN NG DY TRN KHNG
Xem mc Khi tro ln ct in v thm: 1- Phi c phiu cng tc v t nht hai
ngi thc hin ti mt v tr. Mt ngi di tr gip kim gim st an ton; mt ngi
trn ct thao tc thay cch in. 2- Ct in ng dy, tip t hai u khu vc lm
vic. Tun th cc bin php an ton khi lm vic trn cao. 3- Ngi tro ln ct
phi mang theo ti ng dng c v mt dy thng (hoc ni lng) mm ng knh khong
8mm, di hn chiu cao ca ct buc ko cch in mi ln hoc buc h cch in c
xung. 4- Ch lm vic khi mc xong dy lng an ton vo v tr c nh v t th lm
vic chc chn. 5- Ti ni ng ngi qua li, phi lm ro chn, bin bo ngn ngi
qua li; phng dng c, cch in ri vo u nhng ngi pha di. 6- Khi thay cch
in ng dy c in p 110kV, phi ct in cc ng dy giao cho i di. Cc trng hp
khc phi dng dy no dy dn ca pha cn thay cch in phng tut dy ri xung
ng dy pha di ang mang in gy chm chp, in git.27. KHI S DNG N KH
XNG
1- Phi kim tra n kh trc khi s dng. n kh khng c tc hay x h. 2-
Lng xng trong bnh ti a ch mc 3/ 4 th tch ca bnh. 3-Khng c t hay n
kh di cc vt mang in hoc gn cc cht d chy n. Khng c a ngn la n kh vo
gn cc vt mang in p. 4- Ch sa cha n, b sung xng khi n kh tt ngui hn.
25
5- Cm bm tng p lc khi n b tc. 6- My, vt t, thit b,...pha di khu
vc s dng n kh phi c che y bng vt liu chng chy.28. RI DY QUA NG B,
NG TU HO
1- Phi c phng n an ton thi cng c duyt; thng bo cho n v qun l ng
b, ng st bit phi hp gim st. 2- Phi lm gin gio dy vt ng b, ng st
khng gy n tc giao thng. 3- Phi c ngi canh gc cch ni lm vic 100 mt v
c hai pha ca ng, cm c (ban ngy) hoc n bo (ban m) hng dn v khi cn
thit th tm ngn cc phng tin giao thng qua li qung ng , nhm m bo an
ton cho ngi qua li v cho c cc nhm thi cng.29. RI DY QUA SNG, QUA
SUI
1- Phi c thuyn, b, mng theo nh phng n an ton thi cng c duyt. Phi
thng bo cho c quan qun l ng sng bit phi hp trong vic iu tit giao
thng. 2- Phi chn nhng cng nhn c hun luyn bi, phi c o phao. C phng
tin, phao cu sinh ti hai u bn ko ri dy. 3- Khng ng trn b mng, thuyn
pha thng lu ko ri dy, v thuyn mng tri theo dng nc, dy dn s gt ngi
ri xung sng. Ch ng pha h lu, di dng chy trnh b dy gt gy tai nn.
4-Khng c dy chm xung y sng khi cha bit y sng c chng ngi vt hay khng
v d b mc kt khng x l c.30. RI DY VT TRN HAY CHUI DI NG DY IN , NG
DY THNG TIN.
1- Phi c phiu cng tc. Phi c phng n k thut v bin php an ton thi
cng c duyt. 2- Phi ng k ct in ng dy ang vn hnh chui di, lm tip a
hai u khong ct v lm gin gio dy vt qua khng cho dy 26
chm vo dy dn ca ng dy pha di hoc pha trn. Trong trng hp cn thit
c th h dy dn ca ng dy giao cho chui di nu iu kin cho php. 3- Khi ko
ri dy chui di DK khc, nu khong cch khng m bo an ton bt buc phi ct
in ng dy pha trn. Nu khi cng dy m khong cch t ng dy mi n DK ang vn
hnh ln hn 4m th c th khng phi ct in, nhng phi dng dy thng ni lng ph
hp khng ch, hm gi dy khi bt ln ng dy pha trn. *Nm 2003, ti in lc Ph
Th nhm cng tc thc hin cng vic lp t cp h th i di ng dy 6kV ang vn
hnh, cng nhn ngi trn ct ng dy h th dy do khng m bo khong cch an ton
nn cng nhn b in 6kV phng gy bng nng.
31. DNG CT GN NG DY DN IN TRN KHNG ANG VN HNH.
1-Phi c phiu cng tc, cc dng c dng dng ct phi c kim tra m bo an
ton. 2-Phi ct in, lm tip a khong ct lin quan trong cc trng hp: Khi
cc dy chng no, hm gi ct, ti t s i st hoc chui di DK ang mang in.
Hoc khi dng ct gn DK ang mang in m khong cch t h mng n dy dn gn nht
ang mang in nh hn chiu cao ca ct cng thm vi khong cch an ton phng
in (Theo cp in p). 3- Khi dng ti t dng ct th cm tro ln t, ln ct ang
dng lm bt c vic g. 4- Khi dng ct bng thang, ct chng. Phi kim tra
tht k cc thang v ct chng phng thang yu, ct mc gy gy tai nn. 5-
Trong thi gian dng ct khng cho ngi i li hoc ng di ct ang dng, ng gn
cc si dy hm ang lm vic, ng di hoc cnh cc b t hay chc, di hoc trn
ming h mng. Ngi ch huy dng ct phi ng v tr bao qut c cc cng nhn lm
vic, hiu lnh v c lnh phi dt khot r rng. 6- Khi ct dng ng thng, ngi
ch huy trc tip cha ra lnh lm vic khc th khng ai c ri khi v tr mnh
ang ph trch.
27
7-Ct phi dng lin tc cho n khi ct ng; tr trng hp ct ang dng d,
ngn ct cch cch mt t nh hn hoc bng 0,4 mt m pht hin mt an ton th c
php dng, h ct xung mt t x l. 8-Khng c tho dy hm khi b tng chn c mng
ct cha qua 24 gi.
32. V SINH CC THIT B IN.
*Nm 1996,mt cng nhn qun l vn hnh in, bc 6/7 ca L Ho Bnh khi tin
hnh v sinh s cu dao 35kV, m cu dao vn c in nn b in 35kV phng gy t
vong. *Nm 2000, mt cng nhn QLVH bc 5/7 ca L H Ty khi v sinh cu dao
trm trung gian, do mt m cu dao vn c in, cng nhn vi phm khong cch an
ton nn b in 35kV phng gy t vong. *Nm 2003, khi ct in MBA T1 trm V
Cng L Bc Ninh th nghim nh k, trm kt hp v sinh v sn mt s thit b trm
, sau khi gim st cho CN sn ti cu dao 331-1( cu dao 331-1 ct v tip a
mt pha, m kia ca dao vn c in) v cho CN ngh, trm trng trm V Cng L Bc
Ninh mt mnh vo trm v tro ln cu dao 331-1, vi phm khong cch an ton b
in 35kV phng gy t vong. V vy khi v sinh cc thit b in phi thc hin cc
bin php an ton sau: 1- Phi c phiu cng tc. Phi ct in, th bt, lm tip
a, t ro chn v treo y cc bin bo theo quy nh. 2- Phi hiu r thit b s c
v sinh phn no. Ti tng thit b c lm v sinh phi c t nht hai ngi cng
lm, ngi ny gim st ngi kia. 3- Ch v sinh cc thit b nm trong khu vc c
bo v, c bn giao v cho php. nhn thy cc ng dn in n thit b c tip a an
ton.
33. KHI S DNG PA-LNG XCH KO TAY
28
1- Phi xc nh c trng lng ca vt cn nng, so snh vi kh nng cho php
ca pa-lng. Ti trng th nghim ca pa-lng bng 1,25 ln ti trng nh mc.
2-Phi kim tra tnh trng lm vic ca pa-lng trc khi s dng: Cc xch ti,
xch ko phi tt, khng tut xch khi mang ti; th ko vo, nh ra trn nh,
khng b kt. Khi th h ti, ti trng phi c h nh nhng. 3- Ni treo mc
pa-lng phi chc chn, khng th b tut, ln, lt. Cp treo mc pa- lng v ti
trng phi tit din, chiu di ph hp, khng b x tp, t tao, t nhiu si. 4-
Khi nng ti trng cch mt t khong 0,2m, phi dng li kim tra ton din trc
khi tip tc. 5- Khng ngi ng di ti trng hoc ng chn ng i gia ti trng v
cc vt chng ngi khc. 6-Phi s dng trang b phng h c nhn, c bit l gng
tay bo h lao ng.
34. KHI KHING VC VT NNG, CNG KNH
1- Phi bit c trng lng ca vt, t nh gi kh nng ca mnh liu c th mang
vc, di chuyn n theo mun ca mnh khng phng qu sc, gy chn thng ct sng,
cc khp. 2- Cn quan st, dn dp, chun b ng di chuyn trc khi bt tay vo
di chuyn vt nng. 3- Nu nhiu ngi cng khing vc, vn chuyn mt vt, nhm
cng tc phi c mt ngi ch huy thng nht ng tc s lm. 4- Khi khing vc vt
nng, cng knh, phi khing cng mt bn vai, phi b tr chiu cao ca mi ngi
ph hp vi kch thc, hnh th ca vt. Phi thng nht tng hiu lnh, tng ng
tc. 5-S dng y cc trang b dng c ph hp, an ton.35. KHI HN, CT KIM LOI
TRN MT SN B TNG.
29
Phi c vt liu chu nhit k lt, hng kim loi lng nng chy ca mi hn ct,
cch ly chng vi nn sn b tng xi mng, v khi nhit cao, b tng xi mng s
gin n gy n, bn vo mt, vo mt v nhng ngi xung quanh gy tai nn.36. KHI
HN, CT THNG CHA XNG, DU.
. m bo an ton cn phi: 1-Dng dung dch xt (NaOH) pha long 3% ngm,
ra thng cha; nu c iu kin ph hp nn nhng ngp thng cha vo b cha dung
dch xt (NaOH) 3% m ngm k. Sau thng tht kh, cho ht hi xng, du. 2- Ch
sau khi ngm, ra k v sch s mi c tin hnh hn ct, gia nhit. 3- Vi cc vt
cha ho cht c hi v vt liu d chy n khc, phi c chuyn gia chuyn ngnh
hng dn x l. Khng c t hn, ct chng khi cha c hng dn hoc cha hiu
bit.37. KHI HN, CT KIM LOI TRN CAO.
c nhiu v chy ln, nhiu v tai nn xy ra do vi phm cc quy nh an ton.
m bo an ton phi thc hin cc quy nh sau y: 1- Khng c hn, ct kim loi
trn cao khi pha di c ng dy in cao p cha c ct in. Nu pha di c my mc,
vt t, vt liu d chy, n m khng di chuyn c th chng phi c che ph bng vt
liu chng chy. Phi c khay bng kim loi c treo chc chn st di khu vc
hn, ct hng x hn, mu que hn v kim loi lng nng chy khng cho ri xung t
2- Khi tin hnh cng vic hn ct trn cao phi c ngi cnh gii, gim st bn
di. phng chy, cn c cc bnh cu ho ngay gn ni hn ct. 3- Cc vt cn hn ct
trn cao phi c chng no chc chn bng h thng puly v dy thng: N s khng b
sai lch trong khi hn. Khi b ct ri n khng ri xung t gy h hi hoc tai
nn.
30
4- My hn in di t phi c cu dao ng ct in ti my, c ngi trc bn cnh
trong sut qu trnh lm trn cao. Cc dng c thi cng v que hn phi ng
trong ti c lp y chc chn. 5- Nu dng my hn in, khi thay que hn phi
lnh cho ngi di ct in vo my hn, thay xong que hn mi c ng in tr li.
Khi tm ngng cng vic hn, ct kim loi thc hin cc thao tc khc cng phi
ct in cp cho my hn. 6-Phi thc hin cc bin php an ton nh nu phn Khi
lm vic trn cao.38. KHI TRO CT KIM TRA, GHI CH S CNG T
1- Phi c phiu cng tc hoc lnh cng tc. Nhm i kim tra, ghi ch cng t
phi c t nht hai ngi, phng tin lm vic l thang di ng (bng tre, g hoc
nhm) phi m bo tiu chun k thut. 2- Phi s dng trang b bo v c nhn nh
qun o, giy, m BHL. Khi s dng thang di ng phi yu cu ngi cng i gi chc
chn thang trong khi tro ln hoc tro xung v khi cha mc c dy lng vo v
tr chc chn. 3- Phi lun nh l mnh ang lm vic c tip xc trc tip vi cc
vt c th mang in bt ng, hy dng bt th in h p th vo tt c cc vt bng kim
loi xung quanh, nhng ch c th chm vo v c th chng c in. 4- i vi nhng
trng hp m v tr lm vic cht hp, nhiu tng hp cng t, d chm vo cc vt c
in th phi thc hin ct in trc khi tro. 5- Phi tm v tr c nh chc chn mc
dy lng an ton, khng c mc dy lng vo thang di ng. 6- Khi cn chuyn hng
ng c ch, phi tm ch t chn chc chn, ch khi c t th n nh mi tho dy an
ton mc vo v tr mi. Nu khng c ch t chn chc chn khi cn chuyn hng phi
nhc ngi ng di gi chn thang tro xung. Chuyn thang sang v tr mi ri li
tro ln lm vic tip. Khng c ng trn thang di chuyn sang v tr mi; khng
c ngi tro xung, tro ln.
31
c cng nhn b qua nhng ni dung trn m b tai nn. ng ngh rng cng vic
n gin m khng xy ra tai nn cht ngi. *Nm 1996, cng nhn bc 3/7 ca L
Thi Nguyn khi tro ct kim tra cng t, khng th in b in t ngun khc git
v ng cao 4m. *Nm 2000 cng nhn bc 5/7 ca L Hi Dng i ghi ch s cng t,
khi tro xung b trt chn ng v b m xng i phi phn gn gip xng chu. *Nm
2001, ti L Qung Ninh cng nhn bc 2/7 i ghi ch s cng t, do khng ch
chm dy thng tin b in d git v ng cao.
39. KHI TREO, THO CNG T IN
1. Treo, tho cng t in c th phn ra cc loi cng vic sau: a) Nhng
cng vic lm c tip xc vi ng trc h p, bao gm: - Lp t mi hp cng t in 1
pha, 3 pha cho khch hng mua in trc tip vi ngnh in. - Thay th ng thi
hp cng t 1 pha, 3 pha v cp ngun vo hp cng t. b) Nhng cng vic lm
khng tip xc vi ng trc 0,4kV, bao gm: - Lp t cng t in 1 pha mi vo hp
cng t ang treo c sn trn ct cn trng cho khch hng mua in trc tip vi
ngnh in. - Tho cng t c v lp mi cng t in 1 pha, 3 pha trong hp cng t
ang treo trn ct. - Thay th hp cng t 1 pha, 3 pha nhng khng thay cp
ngun vo hp cng t. 2. Trc khi lp t mi hoc thay th cng t, hp cng t ;
b phn qun l vn hnh li in, treo tho cng t phi n kho st trc tip, c th
tng im thi cng, lp phiu gii trnh phng n cp in trong cn c tnh hnh
thc t xut ct in hay khng ct in ng dy trc 0,4kV khi thi cng, trnh
lnh o chi nhnh duyt. Trng chi nhnh, ph chi nhnh ph trch k thut, KTV
chi nhnh l ngi quyt nh c ct in hay khng ct in. 3. Vic thi cng khng
cn ct in ng dy trc 0,4kV, khi m bo c cc iu kin sau:
32
- Dy dn in 0,4kV l dy cp bc hoc cp vn xon, u ni gia cp vo hp cng
t v ng dy 0,4kV dng ghp php bc nha cch in. - V tr cng tc ch c 1 tng
x, hoc c nhiu tng x nhng ch u ni tng x di cng. - V bc cch in dy dn
cn tt, khng b h hng hoc khng c du hiu e da mt an ton khi thi cng. -
V tr cng tc thong, rng, khng c chng ngi vt gy cn tr vic tro ln ct v
lm vic trn cao, m bo khong cch an ton vi cc ng dy dn in khc. 4. Cc
trng hp sau y phi ct in ng dy trc 0,4kV khi lm vic: - Dy dn in
0,4kV dng loi dy trn m cng vic c tip xc vi ng trc. - Dy dn in 0,4kV
dng loi cp bc, cp vn xon nhng cch in ca ng dy 0,4kV hoc cp c t ng
dy xung cc hp cng t c ch h hng, xung cp e da mt an ton. - Phi u ni
cp t hp cng t vo ng dy trc bng ghp thng khng c v bc cch in. - V tr
cng tc c chng ngi vt gy cn tr vic tro ln ct v lm vic trn cao, khng
m bo khong cch an ton vi cc ng dy khc. 5- Tt c cc loi cng vic treo,
tho cng t u phi thc hin theo phiu cng tc. Nhm cng tc phi c t nht
hai ngi mang y cc trang b bo v c nhn. 6- Phi s dng cc dng c c cp
cch in ph hp. c bit phi c bt th in h p kim tra s r in ra hm cng t,
v cng t v cc kt cu bng kim loi xung quanh ni lm vic trc khi bt tay
vo cng vic treo tho. 7- Khi tro ln ct v lm vic trn ct phi tun th cc
quy nh an ton nh nu phn khi lm vic trn cao. 8- Khi thay cng t c hoc
lp cng t mi vo hp c sn trn ct m khng thay cp ngun vo hp cng t v
khng ct in ng trc 0,4kV:
33
- Tho cng t c: Trc ht tho dy ngun t hp boc cng t c; phi tho u dy
trung tnh trc, dng bng cch in hay u nha bc kn u dy li; tho tip u dy
pha, cng bng bc n li trc khi tho cc u dy cn li v cc dy ra ca cng t.
nh du cc u dy sau khi tho, tip tho b cng t c. - Lp cng t mi: C nh
cng t mi vo hm. Lp ln lt ht cc u dy ra ca cng t. Lp cc dy ngun theo
trnh t dy pha trc, dy trung tnh sau. trnh u nhm, cn nh du u dy. -
Kim tra, nn chnh li cc si dy cho ngay ngn, m quan; Sau khi chc chn
cng t c lp ng, m bo k thut, ng ti kim tra cng t; kho hm cng t v kt
thc cng vic. 9- Lp mi, thay mi hp cng t v cp ngun vo hp cng t nhng
khng ct in ng trc 0,4kV: - Ct ton b cc p t mt, cu dao, cu ch u ra
sau cng t. - Tho dy ngun t ng trc vo hp cng t c; phi tho ln lt tng
pha cp u vo ng dy: Tho cc dy pha trc, tho u dy trung tnh sau, tho u
dy no phi dng bng cch in hay u nha bc kn u dy y trnh chm chp. - Tho
b hp cng t c. Khi tho dy ra cp cho khch hng phi nh du trnh nhm ln
khi u tr li. - Vic u ni cp t hp cng t ln ng trc 0,4kV ch c thc hin
khi hon tt cng vic lp cng t vo hp, hp cng t treo chc chn trn ct, u
xong cp ngun trong hp cng t v thit b ng ct ph ti sau cng t. Tt c cc
p t mt, cu dao, cu ch u ra sau cng t v tr ct. u ln lt tng pha cp vo
ng trc: u dy trung tnh trc, cc u dy pha u sau. - Kim tra, th ti sau
ct cc p t mt, cu dao, cu ch u ra sau cng t v u cp cho khch hng. 10
- Trng hp c ct in ng trc 0,4kV. Bin php an ton v in: - Ct ptmt hoc
cu dao l ng dy 0,4kV s tin hnh cng vic, cc l ng dy khc khng m bo
khong cch an ton, khng m bo cch in e da mt an ton khi lm vic.
34
- Treo bin "Cm ng in c ngi ang lm vic" ti tay thao tc ptmt (cu
dao) ct in. - t tip t ti thanh dn u cc ptmt (cu dao) 0,4kV ct in
pha u ra ng dy. - Nu trn ng dy c cc im c th t thm tip t th t thm
tip t di ng ti cc im tng cng an ton cho i cng tc. c nhiu trng hp b
tai nn lao ng do khng thc hin cc bin php an ton nu trn. *Thng 4 nm
2005, cng nhn thuc in lc Thanh Ho khi lm nhim v thay cng t 3 pha
cho khch hng, do khng bc kn cc u dy nn lc u dy vo hng kp cng t mi
lm chm chp gy phng in 2 pha, cng nhn b bng do h quang. *Trong 2
thng 9 v 10 nm 2005, ti L Cao Bng lin tip xy ra 2 v TNL ng cao do b
in h th git. Khi thc hin nhim v lp t cng t pht trin khch hng mi v
sa cha in cho khch hng do khng kim tra s d in ra cc kt cu kim loi
trn ct nn khi tip xc cng nhn b in d git, gy ng cao v b trn thng
nng.
40. KHI U DY TH CNG T IN
1-Phi c phiu cng tc hoc lnh cng tc. Nhm cng tc phi c t nht hai
ngi. 2-Trc khi ng in vo th cng t m in, phi hon tt cc vic sau trong
iu kin khng c in: * Cng t phi c treo, gi chc chn. * u xong ton b dy
dn ni vo ph ti th. * u xong dy dn t ngun th vo cng t. 3-Phi kim tra
ln cui, m bo an ton mi ng in v phi bo trc cho mi ngi bit. 4-Sau khi
kim tra xong, phi ct ngun th ri mi c tho dy. 5-Cm dng tay cm hai u
dy ngun hoc dy ph ti chc vo im u dy ti hp boc ca cng t. 35
*Nm 1996, mt k thut vin thuc in lc Hi Phng trong lc tin hnh th
cng t sau khi lp t gy chp mch b h quang 0,4kV gy bng nh. *Nm 2002,
cng nhn bc 7/7 ca L Hi Dng khi kim tra th ti cng t chp nhm u c gy
ngn mch u ra ca p t mt, b h quang gy bng nh mu bn tay phi.
41. KHI THO LP NG H O, R LE
1-Phi c phiu cng tc. Nhm cng tc phi c t nht hai ngi. Phi c mt
nhn vin vn hnh bn giao, kim tra, gim st trong sut qu trnh lm vic.
2-Phi u tt mch dng in th cp ti my bin dng in (TI) hoc ngay trc u vo
ng h o, r le trc khi tho. Ch b dy ni tt khi u hon chnh ng h o hoc r
le. 3-Phi tho b cu ch hoc ct cu dao mch th cp ca my bin in p (TU)
hoc p dng cc bin php an ton c bit nh dng thm, gng, ng, dng c cch
in. Ngi cng i phi gim st cht ch tng ng tc ca ngi trc tip lm. 4- i
vi cc t TU hp b, yu cu nhn vin vn hnh ct in v ko ra v tr th nghim.
Phi tho cu ch hoc ct cu dao mch th cp ca TU bt k l loi t trong nh
hay ngoi tri. ------------------------------------------
MC LC NI DUNG Trang
36
Phn 1 : Quy nh chung Phn 2 : Bin php an ton cho tng cng vic 1.
Khi ri tr s i thc hin cng vic 2. Khi no c php khng thi hnh lnh ca
ngi ph trch 3. Nhng khong cch an ton phi nh 4. Khi lm vic trn cao
5. Khi tro ln ct in 6. Khi thu hi dy dn c, cng dy mi 7. Khi i kim
tra, x l s c ng dy, thit b in 8. Khi cht cy dn hnh lang tuyn 9. Ngi
i ca vn hnh cn bit 10. Khi thc hin th nghim cc thit b in 11. Khi n
gn, lm vic gn thit b in. 12. Lp t tip a 3 pha di ng 13. Khi lm vic
ti thit b in. 14.Thao tc ng, ct in 15.Ct cu dao cch ly 16. ng cu
dao cch ly 17.Ct my ngt in 18. ng my ngt in 19. Ko my ngt in hp b
ra v tr th nghim 20. a my ngt in hp b t v tr th nghim vo v tr cng
tc 21. Ct v ko my ngt in hp b t v tr cng tc ra v tr sa cha 22. a my
ngt in hp b t v tr sa cha vo v tr cng tc 23.Thay dy chy cu ch pha
cao p ca my bin p 24.Thay dy ch ca cu ch t ri ca my bin p 25.Sa cha
cu ch t ri ca my bin p 26. Thay cch in ng dy trn khng 27. Khi s dng
n kh xng 28. Ri dy qua ng b, ng tu ho 29. Ri dy qua sng, qua sui
30. Ri dy vt trn hay chui di ng dy in , ng dy thng tin. 31. Dng ct
gn ng dy dn in trn khng ang vn hnh. 32. V sinh cc thit b in. 33.
Khi s dng pa-lng xch ko tay 34. Khi khing vc vt nng, cng knh 35.
Khi hn, ct kim loi trn mt sn b tng. 36. Khi hn, ct thng cha xng,
du. 37. Khi hn, ct kim loi trn cao. 37
03 04 04 05 05 07 08 08 0911 12 13 15 16 17 18 18 19 19 20 20 21
21 22 22 23 24 25 25 26 26 26 27 28 29 29 30 30 30
38. Khi tro ct kim tra, ghi ch s cng t 39. Khi treo, tho cng t
in 40. Khi u dy th cng t in 41. Khi tho lp ng h o, r le
31 32 35 36
38
