generator transformer & unit auxiliary transformer installation 070903

8/10/2019 Generator Transformer & Unit Auxiliary Transformer Installation 070903

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Content

Compilation Reference.......................................................... 1

General Introduction and Characteristics............................. 1

Construction Organization and Schedule........................... 4

Preparation...........................................................................4

Installation Process and Implementation Procedure.......... 6

Qualit control................................................................... 1!

Safe"Ci#ilized Construction.............................................. 16

Compilation Reference

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Item Specification Unit QTY Wt.

n=d1 Hd1+; O)5)

E.3 and O,phase to$er PC 4

>.3 to$er $ith >.3 ushing7 PC *

ain Control o0$ith 2e7 PC 1

?erminal o0 $ith e7 PC 1

Control o0 of ?ap,change PC 1

PumpJith Oil flo$ing Rela 7 PC *

ain Conser#ator PC 1

Pressure Relief 3al#e and Ruer PC +

Gas Rela 'rip,proof cap PC 1

'ehumidifier

PC 1

Jinding ?emperature Controller

'ispla and atcher

PC 1

Signal ?hermometer Indicator and

'ispla

PC +

E.3 ushing PC *

O,Phase ushing K tie,in PC 1

&arthing ushing 5ccessories PC 1

Radiators Set 1?C7 are

correct and tightM $hether taps are cleaned.

f Jhether has sludging= $ater drop= metal chip= etc.

'uring chec2ing of acti#e part and accessories installation= minimize the time

acti#e part e0posed to air. ?ime shall e calculated from unscre$ing of co#er olt

or opening #al#e for e0hausting till tan2 #acuumized. 5ir relati#e humidit shall e

referred to control the e0pose time. anufacturer stipulates that $hen relati#e

humidit8!;= e0pose deniedM $hen at 6!;,8!;= e0pose time shall e less than

1+ hoursM $hen 6!;= e0pose time shall not e0ceed 16 hours.

!.+.8 Installation of ain 5ccessories

a. Installation of 5scending ?o$er

Chec2 C? efore installation. ount ascending to$er as per series numer on

products. a2e sure the C? nameplate face outside of oil tan2 and place air loc2 at

highest part of ascending to$er. Jhen tightening olts of flange= ma2e sure that

gas2et is placed in right position in ad#ance= and then scre$ olts graduall and

e#enl.

. Installation of E3 ushing

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5ssign person speciall monitoring the stand of E3 ushing from horizontal status.

&rection is to e carried out rigger cooperating $ith electrical installer $ith hoo2

and manual hoist as detailed in Plate 1. Place olster e.g. ruer plate or timer

oard under ottom end of ushing. Protect ushing at $here ma contact chain or

rigging $ith ruer plate. Prior to mounting ushing to transformer= clean carefull

the central hole and ushing end that immersed in oil. o#e ushing slo$l to

ao#e of ascending to$er= regulate position of Phase 5 and C= and let fall ushing

slo$l into ascending to$er. 'o not hit ushing on ascending flange. Rigger and

crane operator shall cooperate closel. Open hand hole co#er on ascending to$er=

and $ire E3 lead to ushing panel.

Plate 1 ushing &rection

c. Installation of >3 ushing

17. Chec2 and confirm that no scratch on ushing surface= especiall no scratch=

crac2 and fla2e off on porcelain sealing surface of flange. Clean ushing surface.

+7 ?ie the s2irt of porcelain $ith nlon rope= lift slo$l to ao#e of installation hole

of transformer= and let fall it #erticall and slo$l into transformer. 'o not hit

porcelain on oil tan2 case.

*7 Scre$ olts on flange graduall and e#enl.

47 Jhen $iring ushing and lead= ma2e sure that no olt or other article drop into

oil tan2.

d. Installation of Cooler

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17. Installation of Rac2= Cooler and )an

Chec2 and clean if thereDs an foreign matters inside of cooler. )lush it $ith

satisfactor transformer oil if necessar= and then carr out lea2 test again. air

pressure -.1+ pa for +-min= no lea2age shall e found.7 Chec2 and confirm that

motor and impeller of fan shall e securel installed= and smooth and no loc2 in

rotation. %o distortion of impeller and no contact $ith air duct.

5fter installation of rac2= lift and mo#e cooler slo$l to a#oid collision. )asten it on

rac2= appl flange olts $ithout tighten. Position cooler #erticall and ma2e it $ell,

distriuted. )asten cross piece= and then tighten flange olts.

+7. Pipe Connection= Pump and Oil flo$ Rela Installation

Clean oil pipe efore installationM pump shall e insulated efore installationM

e$are of the impeller direction $hen installing oil flo$ rela. Regulate impeller to

right position tightening nut.

e. Chec2 of On,load ?ap Changer

Chec2 contactor of on,load tap changer O>?C7 as re@uired in manufacturerDs

instruction and confirm the correctness of positionM chec2 operation mechanism

and confirm the correctness of position

f. Installation of Pressure Relief 3al#e

a2e sure flange connecting pressure relief #al#e on oil tan2 is le#el and no slag

on it. Place o,ring $ith adhesi#e to pre#ent it from displacing $hen tightening.

)asten olt at re@uired moment manufacturer. )ace oil outlet on of

pressure relief #al#e to a open space.

g. Installation of Capsule,tpe 3acuum Conser#ator

17. Inside of conser#ator shall e clean. %o scratches are found on capsule. ount

a #al#e and pressure gauge on flange of capsule to test air tightness. 5ppl a 82Pa

pressure on capsule and close #al#e. Pressure shall not reduce $ithin -.! hour.

+7. )i0 rac2 and mount conser#ator on it tightl.

*7. Connect to gas rela pipe and install gas rela after filling oil under #acuum.

47. )it e0haust pipe= oiling pipe= and oil discharging pipe. Install matching stop

#al#es at the ottom of these pipes. 'uring pipe fitting= ma2e sure that seal ring

has een place on the interface.

!7. ?ear off seal on co#er of reather efore installation. ?ighten olt after seal ring

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placed. Oil shall e filled in cup till +,*cm ao#e aluminum chec2 tue to 2eep oil

tightness.

h. Installation of Gas Rela

17. Chec2 $hether outer appearance of rela if sound.

+7. Install rela et$een t$o connection pipes in accordance $ith direction mar2ed

on housing of rela= i.e. red arro$head direct to conser#ator.

*7. Install e0haust pipe of ascending to$ers= concentrate all gas ma e0ist in

ascending to$er in connection pipe of rela.

47. Pipe directl connected to rela shall ha#e a proper gradient $ithin -N !N.

!.+.< Oil )ill under 3acuum

5fter installation of transformer= chec2 and confirm that no tools and materials left

inside of transformer oil tan2. Close co#er of transformer= and fill oil under #acuum.

5fter installation of all accessories= open #al#e connecting gas chamer and oil

chamer at t$o sides of oil conser#ator. a2e sure e@ual pressure inside of

capsule to a#oid damage. 5fter confirmation of all parts connecting of od of

transformer can ear #acuum operation manufacturer $ho shall confirm it in

ad#ance. Parts unale to ear #acuum shall e isolated from #acuation7= open all

#al#es connecting transformer od and start #acuation including od. 'uring

#acuation of oil tan2= chec2 tightness at all times. Stop #acuum pump if necessar

for con#enience of listen to lea2ing sound.

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Plate 2 illing Oil fom Bottom "al,e


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a. Connect #acuometer to proper #al#e on oil tan2.

. Connect #acuum pump to #al#e on the top of tan2 or to conse#ator.

c. )illing Oil and 5dding under 3acuum

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Generator ?ransformer

If acti#e part chec2 and remounting are unale to e finished in one da= satisfied

transformer oil shall e filled into transformer. Resume remounting after draining

oil. Jhen remounting complete= carr out #acuumizing and oil filling under #acuum.

Oil in on,load tap changer has een drained. Connected oil tan2 $ith on,load tap

changer chamer $ith H pipe to ma2e oth of them e #acuumized. Connect oil

pipe of on,load tap changer to ma2e it e filled $ith oil under #acuum together $ith

transformer.

Connect #acuumizing pipe= and turn on #acuum pump. 3acuumize till 1**Pa

1torr7= and 2eep it for < hours= during $hen= fill oil #isa ottom #al#e at oil tan2

Plate +7 $ith oil flo$ less than !t"h and stop filling till oil le#el is 1--mm from co#er

of oil tan2. ean$hile= fill satisfactor transformer oil to chamer of on,load tap

changerM 2eep it under #acuum for < hours. Release #acuum= and dismantle

#acuum pipe and e#acuation e@uipment.

Install supplementar oil pipe at filling #al#e of conser#ator. add oil #isa top of oil

tan2 to pre#ent air from entering #acuumized oil tan2 of transformer.7

5dd oil to proper le#el according amient temperature $hen oil is filled.

+7

Hnit 5u0iliar ?ransformer

3acuumize transformer till +1.*2Pa 16-rorr7 as re@uired manufacturer. Eold the

status for -.!,1 hour. )ill oil #isa ottom #al#e at rate not igger than !t"h= and stop

filling and release #acuum till oil le#el reaching at $here 1--mm from top of oil

tan2. Open all #al#es connecting od to accessories= and add oil till proper le#el

as per temperature at that time.

!.+.11 Eot Oiling Plate *7

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5fter filling oil under #acuum to transformer od= hot oiling shall e carried out in

follo$ing procedures as re@uired manufacturer(

17 ?ransformer connects to oil filter #isa upper and lo$er filter #al#e to form a

closed circulation. Oil direction is from filter to top of transformer= and from ottom

of transformer ac2 to filter.

+7 Eeat the oil to e transferred from filter to transformer to !-,6-.

*7 eep oil circulating till total oil @uantit through transformer e0ceeding + times of

oil tan2 capacit= $hile time of circulation shall not less than 4< hours as re@uired.

47 5fter the $hole oil filling process= sample transformer oil for test again.

!.+.18 O#erall ?ightness Chec2 and Placement

)ill dr air or nitrogen #isa reather at oil conser#ator to chec2 the o#erall

tightness. 5ppl -.-*Pa pressure to oil co#er for +4 hours and no lea2age shall

e found. 5fter filling oil and efore appl #oltage= place G? for 4< hours and E3

unit au0iliar transformer for +4 hours= during $hen release all gas #isa air #ent.

!.+.1+ Grounding

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Jire grounding olt 1+ of on,load tap changer cainet and tap to transformer

housing or oil tan2.

+7

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Plate 3 ot Oiling


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Jire ascending to$er #isa grounding olt to transformer housing or oil tan2.

*7

Connect E3 neutral point ushing #isa steel cored aluminum strand >G,*--"+!

and grounding post insulator FS+,1+6" to grounding grid.

Ground plate shall e $elded to ottom of oil tan2 of transformer. 5fter cleaning

interface= scre$ do$n nut to ma2e the copper,cored cale contact closel to

grounding plate.

Qualit! Control

6.1 5cti#e part chec2 shall meet re@uirements in !.+.6M

6.+ ushing is installed in right position. %o scratch= crac2 and spall on seal interfaceof porcelain ushing flangeM

6.* Insulation oil test shall e in compliance $ith I&C6--6M

6.4 O#erall installation chec2 of transformer shall e in accordance $ith re@uirements

of manufacturer.

Safe"Ci#ilized Construction

8.1 ?o e in strict stipulations as sho$n in &lectric Po$er Construction Safet CodesM

8.+ ?o e in strict oedience to construction safet protection specifications herein

in#ol#edM

8.* 5fter unpac2ing of the e@uipment= $ithout an hesitation= remo#e and dispose all

the deris out ofconstruction area in order to 2eep the galler to e in smooth

access and no an inLuries the nails

8.4 Jhile performing $elding acti#ities= anti,shoc2= e0plosion,proof and metal splashes

etc shall e carried,out=as for the shell of the electric $elding machine= it shall e

$ell grounded.

8.! On the site= all the tools and de#ices shall e 2ept in satisfactor storage and

custodian= the temporar po$er suppl shall e in good conditions $hile

o#erlapping= as $ell= rain$ater,proof= lea2age,resistance methods and actions

shall e implemented. %o an aritrar dismantle those installed and assemled

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scaffoldings and amoo,centered structures= prior to completion of each

construction se@uence or regular shift termination= ta2e care to chec2 those

electric,dri#en tools and grounding cale rolls to e shut,do$n or not.

8.6 In those energized areas= all the acti#ities and operations shall e presented $ith

applicale oImplementation PermitsT= if necessar to utilize flame= flame,

centered o Implementation PermitsT shalle issued.

8.8 'uring installation= oil filter and oil tan2 shall e grounded securel.

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generator transformer & unit auxiliary transformer installation 070903

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