Ncej Mounted Transformer Txhim Kho thiab Ua Haujlwm Qhia

Cov lus qhia no suav nrog kev teeb tsa, kev ua haujlwm, thiab kev saib xyuas ntawm ib-theem roj-immersed ncej-mounted faib transformers. Nws yog raws li cov khoom siv kev qhia thiab cov qauv kev lag luam xws li IEEE C57.12.00. Kev txhim kho kom raug, kev ua haujlwm raug, thiab kev saib xyuas tsis tu ncua yog qhov tseem ceeb rau kev nyab xeeb thiab txhim khu kev qha transformer kev pabcuam. Cov lus qhia no suav nrog kev txais thiab tuav, txuas, txuas hluav taws xob, kev sib txuas hauv av, kev kuaj xyuas ua ntej thiab tom qab lub zog, kev ua haujlwm tiv thaiv, kev tshuaj xyuas niaj hnub, thiab kev tuav dej.

Cov khoom siv npog: Ib-theem roj-immersed overhead faib transformers (paub series)
Cov qauv siv tauIEEE C57.12.00, IEEE C57.12.90, NEMA TR1, NFPA 70E
 

 

 

 

 

 

1.1 Hazard level txhais

Cov lus qhia	Lub ntsiab lus
DANGER	Tam sim no muaj kev phom sij uas, yog tias tsis zam, yuav ua rau tuag, raug mob hnyav lossis khoom puas tsuaj.
CEEB TOOM	Tej zaum yuav muaj teeb meem uas, yog tias tsis zam, tuaj yeem ua rau tuag, raug mob hnyav lossis khoom puas tsuaj.
CEEB TOOM	Tej zaum yuav muaj teeb meem uas, yog tias tsis zam, tej zaum yuav ua rau me me / nruab nrab raug mob los yog khoom puas tsuaj.

 

1.2 Cov kev cai dav dav txog kev nyab xeeb

Tsuas yogcov neeg ua haujlwm tsim nyog(kawm nyob rau hauv high-voltage khoom installation, txij nkawm, kev khiav hauj lwm, kev siv PPE zoo, thiab kev pab thawj zaug) tej zaum yuav ua hauj lwm rau cov cuab yeej no.

Ua ntej kev saib xyuas lossis tshuaj xyuas:

• De-energise lub transformer los ntawm aqhov chaw nyob deb.
• Siv lub ntsuas hluav taws xob tsim nyog los kuaj xyuasxoom voltage ntawm tag nrho cov high-voltage thiab low-voltage bushings.
• Ua tib zoo av tag nrho cov terminals(ob qho tib si thawj thiab theem nrab).
• Xav txog qhov ua tau backfeed (xws li standby generator).

Tsis txhob cia siab rau kev tshem tawm fuse lossis hloov chaw ua pov thawj ntawm de-energisation.

Hnav PPE tsim nyog (cov hnab looj tes insulating, lub ntsej muag tiv thaiv, arc-flash suit) raws li NFPA 70E xav tau.

Tsis txhob khiav cov kua dej-immersed switching li thaum lub insulating kua kub nyob rau hauv qab no:

• Cov roj ntxhia los yog cov kua dej silicone: -20 degree
• R-Temp kua: 0 degree
• FR3 ™ natural ester kua: -10 degree

 

 

 

 

 

2.1 Tau txais kev tshuaj xyuas (ua ntej unloading)

Yam khoom	Kev ua
Daim ntawv npe	Txheeb xyuas tus lej xov tooj, kVA, HV / LV kev ntsuas, impedance, kua hom kev sib tw.
Kev puas tsuaj sab nraud	Tshawb xyuas cov dents, khawb, deformed radiators, xim puas.
Leaks	Tshawb xyuas welds, bushings, gauges, li qub rau cov roj stains.
Khoom siv	Paub meej tias lub siab / lub tshuab nqus tsev ntsuas, ntsuas roj qib, ntsuas qhov ntsuas kub, ntsuas lub valve, ntes, fuses, phau ntawv qhia, cov ntawv ceeb toom tam sim no.
Lub tshuab nqus tsev vacuum	Kev nyeem ntawv yuav tsum sib txawv nrog qhov kub thiab txias. Tsis tas li xoom yuav qhia tau tias muaj dej xau.

Yog pom muaj kev puas tsuaj lossis tsis txaus,ceeb toom ntawm daim nqi ntawm lading, thaij duab, ua ntawv thov nrog tus neeg nqa khoom, thiab ceeb toom rau cov chaw tsim khoom.

 

2.2 Lifting thiab tuav

Crane / Hoist Lifting:

• Sivtsuas yog muab lifting lugs. Tsis txhob nqa los ntawm bushings, radiators los yog khi-down qhov.
• Cov cuab yeej nqa (hooks, slings, spreader bar) yuav tsum tau ntsuas rau tag nrho qhov hnyav (saib daim ntawv teev npe).
• Siv cov kab sib kis kom cov hlua khi ze li ntsug (lub kaum sab xis tsawg dua lossis sib npaug li 20℃ntawm ntsug).
• Maximum qaij thaum nqa:15℃los ntawm ntsug.
• Thaum ambient kub qis dua -20 degree, kho nrog kev saib xyuas ntxiv kom tsis txhob muaj kev puas tsuaj.

Forklift tuav:

• Tsuas yog rau cov transformers ruaj ntseg mounted ntawm shipping pallet.
• Forks yuav tsum txuas tag nrho hauv qab pallet.
• Tsis txhobnqa ib tug unpalletised transformer nrog ib tug forklift.

 

2.3 Cia khoom

Lub sij hawm luv luv: Khaws rau hauv cov ntim khoom qub hauv qhov chaw huv, qhuav, tsis muaj corrosive.

Long‑term (>3 lub hlis):

• Khaws rau ntawm qhov chaw ruaj khov, theem saum npoo. Siv cov racks cia.
• Tsis txhob stacktransformers - kev pheej hmoo ntawm lub tank thiab bushing puas.
• Tshawb xyuas txhua 3 lub hlis: ntsuas ntsuas, roj qib, xau, corrosion.
• Yog tias lub ntsuas ntsuas siab nyeem xoom lossis qib roj poob, tshawb xyuas thiab kho cov xau.
• Khaws lub siab me ntsis (3-4 PSIG) nrog cua qhuav lossis nitrogen yog tias ua tau.

 

 

 

 

 

 

3.1 Xaiv qhov chaw

Ua raws li IEEE C57.12.00 "Kev Pabcuam Ib Ntus":

• Qhov siab tsawg dua lossis sib npaug li 1000 m
• Ambient kub -25℃rau +40 degree
• Tsis muaj plua plav ntau dhau, corrosive gases, kev vibration, lossis dej nyab.

Nruab nyob rau hauv ib qho chaw nkag tau tsuas yog rau cov neeg ua haujlwm tau tso cai (xws li xauv lub qhov rooj lossis ncej).

Khaws cov radiators (yog tias muaj) tsis muaj kev cuam tshuam.

 

3.2 Ncej mounting

Siv cov hanger brackets muab rau ncaj ncej mounting.

Ncej lub zog yuav tsum txhawb nqa transformer tag nrho qhov hnyav (saib daim ntawv teev npe).

Tom qab mounting, qaij nyob rau hauv txhua txoj kevyuav tsum tsis pub tshaj 3 degree. Kev qaij ntau dhau tuaj yeem:

• Txo cov dej insulating ntawm cov khoom nyob.
• Impair cua txias ncig.
• Muab cov ntawv nyeem qib roj cuav.

 

3.3 Kev tsim kho av

Siv covtshwj xeeb grounding ncoo los yog txiv ntseejntawm lub tank.

Tus neeg xyuas pib hauv av (feem ntau yog tooj liab, Ntau dua lossis sib npaug li 16 mm²) yuav tsum ua raws li cov cai hauv zos.

Kev tiv thaiv hauv av yuav tsum qis raws li qhov yuav tsum tau ua los ntawm cov cai hauv zos (feem ntau Tsawg dua lossis sib npaug li 10 Ω).

Tsis txhobsiv hanger brackets, bushings los yog lwm yam uas tsis yog-grounding qhov chaw rau grounding.

Txuas tag nrho cov nruab nrab muaj nyob rau hauv qhov system nruab nrab.

 

3.4 HV thiab LV kev sib txuas

Ntxuav thiab du tag nrho cov mating connector nto ua ntej kev sib txuas.

Ua raws li daim duab txuas ntawm daim ntawv teev npe.

Tighten bolts rau cov nqi torque hauv Table 3 (saib Tshooj 8).

Tsis txhob muaj ntau lub cantilever loads ntawm bushings (tsis txhob rub cov conductors nruj heev) - txwv tsis pub bushing los yog gasket puas yuav tshwm sim.

Optional insulated terminal caps ntawm HV sab pab tiv thaiv cov tsiaj qus tiv tauj.

 

3.5 Reconfiguring Internal LV kev sib txuas (yog tias xav tau)

Qhov xwm txheej: Transformer nrog peb LV bushings, Hoobkas-set rau E/2E (xws li . 120/240 V), tab sis xav tau E voltage (xws li . 120 V).

Txheej txheem:

• De-energise, av, txo siab (ua haujlwm PRV).
• Tshem tawm lub hau npog los yog lub hau npog (saib Tshooj 8.7).
• Reconnect LV coj los ntawm koob mus rau qhov sib npaug raws li qhia ntawm daim duab kos npe.
• Xyuas kom tag nrho cov kev sib txuas yog nruj (siv lub rooj torque), cov hlau lead yog zoo insulated, thiab tsis txhob kov lub tank los yog ib leeg.
• Reinstall npog, refill rau qib kom tsim nyog, tso cai rau 24 teev, tom qab ntawd ua qhov ntsuas piv los txheeb xyuas.

Hu rau cov chaw tsim khoom yog tias tsis paub meej.

 

 

 

 

 

 

 

Lub transformer yuav tsum tsis txhob energized kom txog rau thaum tag nrho cov nram qab no cov kev ntsuam xyuas thiab kev ntsuam xyuas tiav tiav.

Tsis muaj.	Kuaj / Tshawb xyuas	Paub meej	Kev lees txais
1	Ratio Test (TTR)	Siv transformer lem ratio tester ntawm tag nrho cov kais dej	Tsawg dua lossis sib npaug ± 0.5%
2	Rwb thaiv tsev tsis kam	1000V megger; winding-winding thiab winding-av	Ntau dua lossis sib npaug rau 1.0 GΩ (huv / qhuav)
3	Multi-voltage hloov txoj hauj lwm	Teem raws li daim ntawv teev npe, locking ntsia hlau koom	Txoj hauj lwm raug
4	Coj mus rhaub hloov txoj hauj lwm	Teem rau qhov ntsuas voltage (feem ntau yog nruab nrab kais)	Txoj hauj lwm raug
5	Hauv av	Visual + av tiv thaiv ntsuas	Ruaj ntseg, nyob rau hauv lub zos txwv
6	Bolted kev sib txuas	Torque check ib Tables 1-4	Nyob rau hauv lub torque range
7	Dej theem	Level gauge los yog pom plug	Nruab nrab ntawm "High" thiab "Low"
8	Dej kub	Nyeem qhov ntsuas kub	Tsis pub tsawg kawg nkaus (saib hauv qab)
9	Internal Fault Detector (IFD)	Tshem cov txiv kab ntxwv shipping xauv	Xauv tshem tawm
10	Tam sim no transformers (CTs)	Yog tias tsis txuas nrog kev thauj khoom, cov hlau lead yuav tsum luv luv thiab hauv av	Tsis qhib Circuit Court
11	Accessory thaiv	Tswj, tswb circuits - tsis muaj kev sib txuas xoob lossis puas rwb thaiv tsev	Zoo mob
12	Tank tiav	Xim - tsis muaj kev puas tsuaj, xeb	Txais tau

 

Yam tsawg kawg nkaus tso cai dej kub ua ntej energis:

• Mineral roj / silicone: -20 degree
• R-Temp: 0 degree
• FR3: -10 degree

Yog tias cov kua dej txias dua, sov nws maj mam (xws li nrog cov pam cua sov) ua ntej muaj zog.

 

 

 

 

 

 

Tom qab thawj lub zog (zoo dua los ntawm qhov chaw nyob deb), ua:

• Txheeb xyuas qhov voltage thib ob- Yuav tsum tsis pub dhau ± 5% ntawm daim ntawv teev npe tus nqi.
• Tshawb xyuas cov dej xau- Tshawb xyuas welds, bushings, li qub, gauges rau cov roj seepage.
• Saib xyuas kev ua haujlwm- Tsis muaj kev vibration txawv txav, pa taws, sparking, lossis suab nrov txawv txawv.
• Tshawb xyuas cov ntsuas- Cov roj qib yuav tsum nce siab (raws li qhov kub nce), tus pas ntsuas kub yuav tsum maj mam nce, lub ntsuas ntsuas lub tshuab nqus tsev yuav tsum pom qhov zoo.
• Suab nrov- Ib txwm yog qhov "hum" tsis tu ncua (magnetostriction).

Cracking / intermittent popping → ua tau nto tawm ntawm bushings.

Buzzing nrog arcing suab → internal xoob kev twb kev txuas los yog core teeb meem.

Suab nrov heev → over-excitation los yog overvoltage.

• Infrared Thermography (yeem)- Tshawb xyuas cov kev sib txuas ntawm lub davhlau ya nyob twg rau qhov chaw kub.

 

 

 

 

 

 

 

6.1 Cov cai dav dav

• Siv acov cuab yeej nyob-kab (kub stick lossis phom phom stick)rau cov cuab yeej tsim los rau kev ua haujlwm zoo li no. Tsis txhob ua haujlwm ntawm tes.
• Txhua zaus de-energise thiab hauv av ua ntej ua haujlwm hloov lossis hloov fuses.

 

 

6.3 Multi-voltage hloov

• Tsis tas li ntawd de-energized nkaus xwb.
• Kev teeb tsa Hoobkas feem ntau yog qhov chaw siab tshaj plaws.
• Yog hais tias ob qho tib si kais dej thiab ntau qhov hluav taws xob windings muaj, xyuas kom lub kais hloov nyob rau hauv txoj hauj lwm uas pom ntawm daim ntawv teev npe thaum muaj ntau qhov hluav taws xob hloov nyob rau hauv txoj hauj lwm sib npaug.

 

 

6.5 Magnex cuam tshuam

Internal roj-immersed overcurrent thiab overtemperature ntaus ntawv rau HV sab.

Kev ua haujlwm nrog kub stick:

• Qhib: Tig kov sab saud (counter-clockwise) rau OPEN txoj hauj lwm.
• Kaw: tig tuav downward (clockwise) nrees tiv thaiv nres nyob rau hauv CLOSED txoj hauj lwm.
• Rov pib dua tom qab taug kev: ua ntej rau OPEN, tom qab ntawd rau CLOSED.

Kev xaiv thaum muaj xwm txheej ceev tshaj (EO): ntawm OPEN txoj hauj lwm, tig EO lever counter-clockwise rau EO, ces kaw.

Yeem qhov taw qhia mus txawv tebchaws: txiv kab ntxwv lens tshwm thaum tripped.

 

6.6 Fuse

Weak-link fuse: mounted ntawm HV bushing puag lossis ntawm kev hloov; tiv thaiv overloads thiab internal faults.

Ib nrab-nqi tam sim no-limiting fuse: nyob rau hauv series nrog weak-link; txwv lub zog rau cov kev ua txhaum sab hauv siab tam sim no.

Hloov:

• Txheeb xyuas thiab kho qhov laj thawj ntawm kev ua haujlwm ua ntej hloov.
• Siv qhov ntsuas thiab cov yam ntxwv zoo ib yam.
• De-energise, av, qhib tank (saib Tshooj 8.7) kom nkag mus.

 

 

 

 

 

 

Ntaus ntawv	Ib txwm qhia / siv	Abnormal / kev ua
Lub tshuab nqus tsev vacuum	Nws txawv nrog load thiab kub; zoo thaum kub, tej zaum yuav tsis zoo thaum txias	Tsis tu ncua xoom → tuaj yeem xau, tshawb xyuas
Roj qib ntsuas	Ntawm 25 degree, taw tes ntawm "H" thiab "L"; nce nrog kub	Hauv qab "L" → ntxiv cov kua dej thiab kuaj xyuas cov dej xau
Roj ntsuas kub	Sab saum toj roj kub feem ntau Tsawg dua los yog sib npaug li 85 degree; liab luag tes cov ntaub ntawv max	>95℃→ check load, txias, dej txias
Drain valve / sampling ntaus ntawv	Tshem tawm los yog nqa cov qauv los ntawm qab ntawm lub tank	Pas → hloov gasket lossis valve
Tsis siv neeg siab nyem valve (PRV)	Qhib thaum lub siab sab hauv siab tshaj qhov taw tes, ces rov ua dua	Tom qab ua haujlwm, tshawb xyuas qhov laj thawj
Internal Fault Detector (IFD)	Pops tus chij txiv kab ntxwv uas tsis tuaj yeem hloov dua tshiab thaum muaj teeb meem sab hauv arcing tshwm sim	Txiv kab ntxwv chij pom → transformer yog faulted,tsis muaj zog

IFD ceeb toom: IFD yog qhov taw qhia pom nkaus xwb, tsis yog hluav taws xob txiav. Txawm hais tias IFD tsis tau ua haujlwm, qhov hloov pauv tseem tuaj yeem ua txhaum. Tsis txhob cia siab rau nws ua ib qho kev ruaj ntseg de-energisation ntaus ntawv.

 

 

 

 

 

 

 

 

 

8.1 Pom zoo lub sijhawm txij nkawm

Lub sijhawm	Kev ua si
Txhua hli (lub luag haujlwm hnyav lossis ib puag ncig hnyav)	Kev kuaj pom pom, roj qib, suab txawv txawv, IR thermography
Txhua 6 lub hlis	Kev tshuaj xyuas xim, rov kho cov bolts, huv radiators
Txhua xyoo	Roj sampling (dielectric zog, dej ntsiab lus, acidity, DGA)
Txhua 3 xyoos	Rwb thaiv tsev tsis kam, piv txwv kuaj, kev ntsuas fais fab
Tom qab ua txhaum los yog txawv txav	Kev soj ntsuam roj tam sim thiab ntsuas hluav taws xob

 

8.2 Sab nrauv xim tiav

Yog hais tias primer los yog liab qab hlau raug, kho tam sim ntawd los tiv thaiv corrosion:

• Xuab zeb rau thaj tsam kom tshem tawm xeb thiab xoob xim.
• Ntxuav nrog hnyav (tshem roj, roj).
• Siv anti-xeb primer.
• Siv ob lub tsho tiv no sab saum toj (siv cov chaw tsim tshuaj pleev xim yog tias muaj).

 

8.3 Kev kho cov dej xau

Leak pov thawj:

• Ntxuav qhov chaw tsis txaus ntseeg, siv talc lossis cov kua dej tawm kom pom.
• Pressurize tank nrog cua qhuav lossis nitrogen rau 3-4 PSIG, tos 1-2 teev, tshuaj xyuas.

Txoj kev kho:

• Pinhole los yog weld seam leak on tank: de-energise, drain, weld (muaj peev xwm welder).
• Radiator leak: tsis welding (cov khoom nyias); hloov lossis siv cov khoom kho epoxy.
• Bushing to: sim zawm clamp bolts (torque Table 2); yog tias ua tsis tau, hloov gasket.
• Valve lossis gauge leak: hloov gasket lossis tag nrho cov khoom.

 

8.4 Insulating kua dej tu

Cov txheej txheem Sampling:

• De-energise thiab av.
• Flush ntws valve nrog me me roj.
• Nqa cov qauv hauv lub thawv huv, qhuav, tsis txhob tshav ntuj.
• foob ​​tam sim ntawd thiab xa mus rau kev tshuaj ntsuam.

Hom kev lees txais (mineral oil):

Parameter	Txais tus nqi
Dielectric zog	Ntau tshaj lossis sib npaug li 26 kV
Cov ntsiab lus dej	Tsawg dua lossis sib npaug li 35 ppm
Acidity	Tsawg dua lossis sib npaug li 0.1 mg KOH / g
Lub zog muaj zog @ 25 degree	Tsawg dua los yog sib npaug li 0.5%

Lim:

• Siv lub tshuab lim xovxwm kom txog thaum lub zog dielectric Ntau dua lossis sib npaug li 26 kV.
• Tsis txhob sib tov cov kua dej; lub lim xovxwm yuav tsum tsis muaj paug los ntawm lwm cov kua.

Refilling:

• Siv raws nraim tib hom thiab hom kua.
• Twj maj mam los ntawm hauv qab ntawm lub tank kom tsis txhob muaj cua npuas.
• Sau rau kab cim hauv lub tank, tom qab ntawd cia 24 teev rau huab cua kom khiav tawm ua ntej muaj zog.

 

8.5 Kev ntsuam xyuas hluav taws xob (periodic lossis diagnostic)

Kuaj	Txoj kev	Txais
Rwb thaiv tsev tsis kam	1000V lossis 2500V megger	Ntau dua lossis sib npaug rau 1 GΩ (qhuav)
Ratio (TTR)	TTR tester	±0.5%
Rwb thaiv tsev fais fab	2.5 kV lossis 10 kV choj	Tsawg dua lossis sib npaug li 0.5% @ 20 degree
Winding DC tsis kam	Micro-ohmmeter	Deviation Tsawg dua lossis sib npaug li 2% ntawm theem

 

8.6 Torque cov lus qhia

Table 1 – Sab nraud fasteners

Fastener hom	Nominal torque (hauv-lbs)	Torque ntau yam (hauv-lbs)
3/8" bolts	240	220‑260
Handhole npog bolt	144	129‑158
Npog band bolt	180	170‑185
Surge arrester mounting ntsia liaj qhov rooj	420	372‑468

Table 2 – Sab nraud bushing mounting hardware

Bushing hom	Nominal torque (hauv-lbs)	Torque ntau
LV molded Tri-Clamp (tsis muaj lub nplhaib clamp), 3/8 "stud	60	40‑80
LV molded (nrog lub nplhaib clamp), 3/8 "stud	120	90‑150
LV porcelain (nrog lub nplhaib clamp), 1/2 "stud	80	70‑90
HV molded Tri-Clamp, 3/8 "stud	60	40‑80
HV molded (nrog lub nplhaib clamp), 3/8 "stud	120	90‑150
HV porcelain	80	70‑90

Table 3 – External terminal txuas

Terminal hom	Nominal torque (hauv-lbs)	Torque ntau
HV porcelain bushing eye-bolt	210	180‑240
HV porcelain bushing kawg cap	168	156‑180
LV bushing 5/8" jam txiv ntoo	600	480‑720
LV bushing 1" jam txiv ntoo	600	480‑720
LV bushing 1-1/4" jam txiv ntoo	720	600‑840
Sab nraud arrester kab lead	180	162‑198
Sab nraud arrester av lead	180	162‑198

Table 4 – Accessories

Cheebtsam	Nominal torque (hauv-lbs)	Torque ntau
Bushing-mounted tsis muaj zog-link fuse bolts	85	80‑90
Fluid Level Sight Plug	960	900‑1020
Fill ntsaws	960	900‑1020
Drain plug	960	900‑1020
Dej valve	600	480‑720
PRV 1/4" NPT	180	160‑200
PRV 1/2" NPT	360	324‑396
Tsis siv neeg pluaj fastener (hauv av ncoo)	160	140‑180
Coj mus rhaub hloov mounting txiv ntseej	120	96‑144

Vim lub gasket so, ntsuas torque yuav qis dua nominal. Tsis txhob overtighten - kev pheej hmoo ntawm tawg los yog over-compression.

 

8.7 Qhib lub tank transformer

Tsuas yog thaum tsim nyog kiag li(xws li kev hloov fuse sab hauv, LV reconfiguration, kev hloov kho sab hauv).

Txheej txheem:

• De-energise, hauv av, txo qhov siab (ua haujlwm PRV nrog cov pas kub kub - ceev faj ntawm cov dej kub).
• Ntxuav thaj chaw nyob ib ncig ntawm lub hau los yog lub qhov tes kom tiv thaiv cov khib nyiab nkag.
• Tshem cov bolts, ua tib zoo nqa lub hau (tiv thaiv gasket).
• Yog tias cov kua dej yuav tsum tau qis dua, tso rau hauv cov ntim huv si, qhuav (tsis txhob txo cov dej hauv qab cov tub ntxhais / coil clamp pan - coils yuav tsum nyob twj ywm).
• Thaum ua haujlwm: siv cov npog huv, tsis muaj lint-dawb; khi cov cuab yeej nrog txoj hlua ruaj ntseg kom tsis txhob poob rau hauv lub tank.
• Tsis txhob cia lub tank qhib rau ntau tshaj 2 teev.Yog tias cuam tshuam, rov ua dua thiab sau nrog cua qhuav lossis nitrogen.
• Ua ntej rov txhim kho lub hau, hloov cov gasket puas. Tighten bolts rau Table 1 torque.
• Rov ua dua maj mam, tso cai rau 24 teev, tom qab ntawd ua qhov ntsuas kev tiv thaiv kev tiv thaiv ua ntej lub zog.

 

 

 

 

 

 

 

Cov tsos mob	Ua tau	Kev ua
Secondary voltage tsis raug	Txoj haujlwm kais tsis raug, tsis raug HV txuas, tshuab fuse	De-energise, xyuas kais hloov, xaim, hloov fuse
Kub kub	Overload, thaiv radiators, qis roj theem, sab hauv txhaum	Txo cov load, huv si radiators, ntxiv roj, qauv roj
PRV ua haujlwm	Internal arc, hnyav dhau, roj tsim	De-energise, xyuas IFD, ua DGA - tsis txhob rov ua kom lub zog dig muag
IFD txiv kab ntxwv chij pom	Internal arcing txhaum	Transformer yog faulted - hloov unit
Tsawg rwb thaiv tsev tsis kam	Moisture nyob rau hauv roj, qias neeg bushings, laus rwb thaiv tsev	Ntxuav bushings, lim los yog hloov roj, qhuav tawm
Suab nrov txawv txav (tsis yog ib txwm hum)	Lub hauv paus xoob, winding txav, over-excitation	De-energise, check ratio thiab tsis muaj-load tam sim no
Roj theem maj mam poob	Leak	Nrhiav thiab kho cov dej xau, sab saum toj
Lub tshuab nqus tsev ntsuas ntsuas ib txwm xoom	Tank foob poob	Kev ntsuam xyuas, kho, ces khiav tawm thiab rov ua dua

 

 

 

 

 

 

 

 

 

Ncej mounted transformers pab nyiaj siv ua haujlwm faib cov kab, tab sis ntau daim ntawv thov hluav taws xob xav tau lwm yam kev sib txuas los yog cov ntaub thaiv npog. Txhawm rau ua tiav cov txheej txheem ntawm kev teeb tsa transformer thiab kev ua haujlwm, saib cov lus qhia ntxiv hauv qab no.

• Substation Transformer Installation and Operation Guide
• Fais fab Transformer Installation and Operation Guide
• Pad Mounted Transformer Installation thiab Kev Qhia Ua Haujlwm
• Dry Type Transformer Installation and Operation Guide
• Compact Substation Installation thiab Kev Qhia Ua Haujlwm

 

 

 

 

 

 

 

10.1 Ordering spare qhov chaw

Muabtransformer serial tooj(ntawm nameplate), ib feem piav qhia, thiab kom muaj nuj nqis.

Hu rau cov chaw tsim khoom muag lossis kev pabcuam.

 

10.2 Warranty

Qhia rau cov chaw tsim khoom tam sim yog tias muaj teeb meem tshwm sim thaum lub sijhawm lav.

Tag nrho cov kev kho warranty yuav tsum tau pom zoo los yog ua los ntawm cov chaw tsim khoom.

 

10.3 Pov tseg

Tshem tag nrho cov dej insulating ua ntej scrapping lub transformer.

Pov tseg cov kua raws liib puag ncig kev cai hauv zos(tsis txhob nchuav).

Lub tank steel, core thiab tooj liab windings tuaj yeem siv dua.

Cov kua dej los ntawm cov hloov pauv qub (ua ntej xyoo 1970s) tuaj yeem muaj cov PCBs - ua rau cov khib nyiab pov tseg.