Alstom Grid Bushings Pno Light Uk Web

7/29/2019 Alstom Grid Bushings Pno Light Uk Web

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GRID

PNOCondenser Bushings52-245 kV

bushings

Customer Benefts

Buhin with loner

lifetime and hiher reliability

Utilization under extreme

weather condition (lower

pour-point value)

No oxidation phenomena

typical with mineral oil

No performance reduction

with ae

Voltage and current ratings

Rated voltae rane for PNO buhin, normal

cantilever load, i 52 to 170 kV. Heavy canti-

lever load i 52 to 245 kV. PNO buhin, for

a rated voltae, are deined in order to have

the ame overall dimenion for all the normal

ervice current. There are three connection

alternative for the conductor:

Draw lead connection for 800 and 1250 A

Draw rod connection for 1250 A Bottom connection, uin a riid conductor,for1600 A

Uin uitable acceorie, any draw rod

1250 A buhin can be converted to draw lead

buhin, only for minimum under flane leeve

lenth, and vice vera. Minimum 1250 A draw

lead conductor ection are lited in fi. 11.

AN ALSTOM COMPANY

Dein, component and manufacturin

technoloy promote an averae lifetime in

exce of 30 year under normal operatin

condition.

The bushing is designated as follows:

PNO.145.650.800.X.Y

PNO IEC type Condener Buhin,Oil-Imprenated Paper (OIP)oil-to-air application

145 Inulation cla in kV650 BIL in kV800 Rated current in AX Cantilever load:

N = NormalH = Heavy

Y Oil ide hield:N = NormalL = Removable upward

(for 245 kV only)

OIL-TO-AIR - Oil-impregnated Paper

IEC STANDARDS 60137

PNO bushings are capacitance graded bushings with an oil-impregnated paper core.

They meet IEC 60137 Standards: insulated bushings for alternating voltages above 1000 V.They are designed for use in power transformers and can be installed up to a maximum

of45 inclination off the vertical.


2/8

CONDENsER BUsHINgs PNO

Main FeaturesPNO: IEC Standards Condenser Bushings

Rane 52 to 245 kV

Current up to 1600 A

Oil-Imprenated Paper

Air ide: porcelain inulator or compoite inulator

Oil ide: epoxy rein inulator

Partial dichare: max. 5 pC at 1.5 Un

synthetic imprenatin oil DDB

Dodecylbenzene fully micible with tranformer oil

Provided with power factor tap

(voltae tap upon requet)

Draw lead for 800-1250 A - draw rod for 1250 A

bottom connection for 1600 A application

Head made of pecial UHV filter primatic la

with oil level indication viible at any anle of iht

Flane made of cat aluminum alloy.

standard anle of intallation max of45 off vertical

Fig. 1: Bushings 245 kVHeavy Cantilever load

Fig. 2: Bushings 52 to 170 kVNormal Cantilever load

1

1

2

2

3

3

4

4

5

5

6

6

8 8

99

7

7

1. HV Terminal

2. UHV lter la

3. Porcelain

4. OIP Condener

5. Windin tube

6. Power factor tap or voltae tap

7. Flane

8. Epoxy rein inulator

9. Oil ide hield


3/833


Manufacturing

The main electrical component i the condener body, manufactured

uin a continuou heet of pure kraft paper, wound around a central

conductor tube or rod. Durin the windin proce, the paper i

dried by heated cylinder in order to reduce it water content to 1%

maximum. A erie of aluminum foil are coaxially inerted between

the layer of the paper, to achieve the bet poible ditribution of

the radial and lonitudinal electrical radient between the central

tube and the flane, which i rounded. The windin i made by

computer-controlled machine, with ubequent machinin to achieve

the final hape. After windin, each buhin i individually aembled

and placed into an oven and then proceed under vacuum for the

appropriate period of time. Each one i then imprenated with

ynthetic oil, which ha been deaed and proceed o that it ha

a maximum water content of3 ppm. Each buhin i placed under

preure to inure thorouh imprenation and to tet that it i properly

ealed. After imprenation, the buhin head i filled with a nitroen

cuhion. Thi proce i automatic and computer controlled.

Top terminal

The tandard buhin top terminal i made of aluminum without

any urface treatment. Upon requet, it can be upplied in tinned or

ilvered copper. Draw lead or draw rod type buhin (800 and

1250 A) have a removable top terminal. Thi terminal i connected to

the copper inner terminal lu or the draw rod by mean of multiblade

contact and i ecured to the buhin head by crew. In bottom

connected buhin (1600 A), the inner non-removable rod alo act a

top terminal.

Head and oil level indication

The metal component of the head are made of a cat aluminum

alloy. Buhin have an oil head reervoir, primatic in hape, made of

boroilicate la, and containin a UHV filter, which allow for an eay

check of the oil level even from a ditance and at any anle of iht.

Air side

The air ide inulator i made of brown porcelain. grey porcelain or

compoite inulator (rein fiberla envelope covered by ilicone hed)

i available upon requet. The typical creepae ditance i uitable for

very heavy polluted atmophere. The hed confiuration i an alternatin

type: hort-lon hed. Thi i the mot effective olution, proven by

alt pray tet. The hed profile complie with IEC 60815 - 1986

recommendation. A one-piece porcelain or multiple piece porcelain,

in order to meet standard or pecial requirement, are ued for buhin.

Multiple piece are lued uin epoxy rein, without ue the of aket,

and the final porcelain i conidered a a inle piece (it pae

iEC 60233 - 1974, claue 6 tet).

Flange

The flane i made of cat aluminum, and i equipped with the

followin acceorie:

Lifting holes Power factor tap, teted at 2 kV for 60 (fi. 3),

and/ or voltae tap, upon requet (fi. 4)

Buchholz relay connection: 1/2 a outlet plu Oil sampling plug (for 145 kV buhin).

1. Cloin and roundin cap

2. Meaurement electrode

3. Inulation tap

4. gaket

5. Tap ane

6. Buhin ane

7. Lat layer

1. Cloin and roundin cap

2. Meaurement electrode

3. Inulation tap

4. gaket

5. Fillin plu

6. Buhin ane

7. Connection to internal layer

8. Tap external houin

Fig. 3: Power Factor Tap Fig. 4: Voltage Tap

7 4 6 5

3 2 1 1423

7

6

4 5 8


4/8


Oil side

The oil ide envelope i made of a molded epoxy rein. Thi rein i

a two-part compound conitin of a rein bae and a hardener; the

filler material i quartz and. The epoxy rein envelope permit hape,

thickne and dimenional tolerance not poible with porcelain.

Under flane leeve lenth for CT accommodation, different from

tandard, i available upon requet. In thi cae, the rounded part i

obtained by mean of a metallic tube or directly by the lat metallic

layer inide the condener body.

Oil side shield

The bottom end of the buhin i hielded by a proper deflector, made

of aluminum alloy. It i deined to reduce the electric field tre

in oil and to creen the connection between the lead comin from

the tranformer windin and the buhin itelf. Buhin up to and

includin 170 kV have a deflector interated in the epoxy rein tail.

245 kV 1600 A buhin have an aluminum hield that can be moved

upward. The ame hield i available, upon requet, for 800 and

1250 A buhin.

Assembling

The mechanical couplin amon all the part of the buhin i made

by mean of prin placed into the head of the buhin. 245 kV

buhin are alway aembled uin (air ide) porcelain cemented to

flane (fi. 5) a well a the one for heavy cantilever (H) load. The

cement ued i quick ettin monocalcicaluminized type. All cemented

urface, potentially in contact with the external environment, are

ilicone ealed (fi. 5).

Insulating uid

We have over 20 year of field-proven experience with oil-imprenated

paper buhin uin ynthetic oil dodecylbenzene (DDB). DDB oil i a

mixture of monoalkylbenzol: a benzenic rin with lateral aturated chain

(fi. 6). Thi oil ha uperior dielectric and inulatin characteritic than

mineral oil:

superior and contant dielectric qualitie (non ain) Hih a aborption under electrical field tre and hih temperature Neliible toxicity

Excellent bioderadability Full micibility with tranformer mineral oil A very low pour point and hiher flah point No PCB content

Fig. 5: Cemented porcelain

1. Porcelain

2. Cement

3. Metal cemented rin

4. Flane

5. silicone ealin

Fig. 6: DDB dodecylbenzene synthetic oil

saturated lateral chain

Benzenic rin

---(CH2)

9-13---(CH

3)

1

5

2

3

4

5


5/855


Gaskets

Made of Viton, a fluorocarbon rubber elatomer (FPM), o-rin

type. They are compatible with all the fluid they are in contact with

(buhin imprenatin ynthetic oil and tranformer mineral oil). Air

ide aket are carefully protected, by mean of a ealin, aaint

influence of pollutin weather element. For pecial requirement, uch

a low ambient temperature (down to -55C), pecial o-rin are

ued.

Arcing horns

Adjutable arcin horn are available upon requet. The upper arcin

horn i fixed by mean of one crew ued to ecure the top terminal,

while the bottom one i fixed on a proper threaded flane hole (fi. 7).

Transformer oil

synthetic oil DDB ued in buhin i completely micible with

tranformer mineral oil. Thi oil mut have a water content le than

15 ppm for voltae up to 145 kV and le than 10 ppm for 170 kV and

above rated voltae. It dielectric trenth mut be hiher than 60 kV,

accordin to IEC60156.

Tests

All buhin have electrical characteritic and are teted in compliance

with the latet edition of IEC 60137 standard: inulated buhin for

alternatin voltae above 1000 V and Main National standard.

Type tests

Meaurement of dielectric diipation factor (tan d),capacitance and partial dichare quantity before and

after the erie of type tet

Wet power-frequency voltae withtand tet Temperature rie tet Verification of thermal hort-time current withtand Cantilever load withtand tet Tihtne tet Verification of dimenion

H

10

Fig. 7: Discharge distance for a bushingequipped with arcing horns


6/8


PNORange 52 to 245 kV

Dimensions HeadSize

NominalSystem

Voltage

Ratedline-to-

earthvoltage

BIL(Drylightning

impulsewithstand

voltage

Ratedcontinuous

current

Dryandwet

powerfrequency

withstand

voltage(for60s)

Flexibledrawlead

connection

Rigiddrawrod

connection

Bottom

connection

Kmin.

(CTpocket)

Minimum

creepagedistance

(forNormal/eavy

cantileverload)

C:Arcingdistance

(forNormal/eavy

cantileverload)

Normal

cantileverload

Heavy

cantileverload

Weight

Maxoperating

altitude

H(discharge

distance)+/-10%

Type kV kV kV A kV mm mm mm N N kg m mm

52.250.

800

52 30 250

800

95

X

50 1722/1662 610/550

1000

1600

25

4000 3201250 1250 X* X1250

32

1600 1600 X 40

72.5.325.

800

72.5 42 325

800

140

X

0 2359/2299 760/700

1000

2000

29

3000 4501250 1250 X* X1250

38

1600 1600 X 48

100.450.

800

100 58 450

800

185

X

50 3100/3040 985/9251000

2000

432000 6001250 1250 X* X

125052

1600 1600 X 80

123.550.

800

123 71 550

800

230

X

0 3886/3806 1155/1075

1250

3150

84

3000 7501250 1250 X* X1600

95

1600 1600 X 106

145.650.

800

145 84 650

800

275

X

100 4539/4459 1405/1325

1250

3150

105

2000 9001250 1250 X* X1600

120

1600 1600 X 150

170.750.

800

170 98 750

800

325

X

0 5333/5253 1595/1515

1250

4000

120

2000 10001250 1250 X* X1600

130

1600 1600 X 162

245.1050.

800

245 142 1050

800

460

X

0 --/8224 --/2310

-

4000

230

1000 14501250 1250 X X - 265

1600 1600 X - 248

(*) poible only for K minimum - Note: for ratin not lited, conult u.

Dimensions Head

Size

D1 D2 D3 D4 D5 D6 D7 R7 D10 D11 D13 L2 L3 L4 L5 L6 L8 L9 t1 n. F

Type kV kV kV A kV mm mm mm N N kg m mm

52.250.

800

100 185 22530

17035

100 100 60 95

-860

69580

240705

25

-14

6 161250 32 -100

1600 40 - - 915 125 - - -

72.5.325.

800

100 185 22530

17035

100 125 60 95

-1010

84580

240855

25

-

14 6 161250 32 -100

1600 40 - - 1065 125 - -

100.450.

800

115 250 29030

17035

115 175 70 130

-1245

108080

3251090

50

-

16 8 161250 32 -100

1600 40 - - 1300 125 - -

123.550.

800

115 250 29030

23035

115 200 70 130

-1410

124080

3251255

50

-

16 8 161250 32 -100

1600 40 - - 1465 125 -

145.650.

800

145 290 33530

23035

145 225 70 130

-1660

149080

4751505

50

-

19 12 161250 32 100

1600 40 - - 1715 125 - -

170.750.

800

145 290 33530

23035

145 225 70 130

-1850

168080

4751695

50

-

19 12 161250 32 100

1600 40- -

1905 125- -

245.1050.

800

175 400 45030

27050

195 325110 200

-2745

252580

6202550 80

-

22 12 231250 40 130

1600 40 - 175 250 - 2850 125 - 180 -

1. HV terminal M12

2. Copperlug

3. Pin6. Multi blades

4. Belleville washers

5. Winding tube 5. Winding tube


3. Pin

1. HV terminal M12

6. Multi blades

2. Draw rod

1. Top closing cap


3. Solid rod

Fig. 8: 52-170 kV bushing head:draw lead connection

Fig. 9: 52-170 kV bushing head:drawarod connection

Fig. 10: 52-170 kV bushing head:bottom connection


7/877


Fig. 13: 245 kV bushing head: draw rod connection Fig. 14: 245 kV bushing head: bottom connection

I

I

rated voltage < 170 kV

Section(mm2)

800

700

600

500

400

300

200

100

0200 300 400 500 600 700 800 900 1000 1100 1200 1300

I (A)

k=500k=0

I

rated voltage 170 kV

I (A)

900

800

700

600

500

400

300

200

100

0200 300 400 500 600 700 800 900 1000 1100 1200 1300

Section(mm2)

k=500k=0

I

rated voltage 245 kV

I (A)

Section(mm2)

1000

800

700

600

500

400

300

200

100

0200 300 400 500 600 700 800 900 1000 1100 1200 1300

900 k=500k=0

I

I

5t1

n holes F

F+8

+

1. HV terminal

2. Copperlug

3. Pin

4. Bellev ille washers

5. Winding tube

M12

6. Multi blades

3. Pin

1. HV terminalM12

6. Multi blades

2. Draw rod


5. Winding tube

1 - Top closing plate

2 - Springs

3 - Solid rod

D11

D10

L8

L5

K

L2

L3

C

t1

L6

R7

45

D5

D4L4

D6

D1

D7

D3

D2

3

2

1

D11

D10

R7

D6

D1

D7

L8

L5

K

t1

L2

L3

C L6

L4D4

D5

45

D3

D2

1

2

3

1. Air drainin plu

2. Liftin hole

3. Power factor tap

Fig. 15: PNO Bushings 52 through 170 kV Fig. 16: PNO Bushings 245 kV Fig. 17: Flange fxing holes

Fig. 12: 245 kV bushing head: draw lead connection

Fig. 11: Draw lead conductor sections


8/8


Grid-P

roducts-L3-PNO_

light-71961-2011_

02_

EN-Alstom,t

heAlstomlogoandanyalternativeversionthereofaretrademarksandservicemarksofAlstom.Theothernamesmentioned,registeredornot,arethepropertyoftheirrespec

tivecompanies.The

techni

calandotherdatacontainedinthisdocumentareprov

idedforinformationonly.

NeitherAlstom,

itsofcersnoremployeesacceptresponsibility

fororshouldbetakenasmakinganyrepresentationorwarranty(whetherexpressorimplied)astotheaccuracy

l t f h d t t h h i t f j t d f i t i

h t h i d i t d N l i b i l i t i t d f

l i l d

t h i f t i t i d i t h i b h A l t t h i h t t

i h t h

Followin the acquiition of PAssONI & VILLA, Altom grid now offer a lare portfolio of condener buhin for AC or

DC operation. If you require any further information, pleae addre your querie to

[email protected] ALSTOM COMPANY

GRID

Alstom Grid Worldwide Contact Centre

www.rid.altom.com/contactcentre

Tel.: +44 (0) 1785 250 070www.grid.alstom.com

To contact the manufacturer

Viale suzzani, 229 20162 MILANO (Italy)

Tel.: +39 02 661 221

Fax: +39 02 647 09 06Email: [email protected]

Routine tests

Dielectric diipation factor (tan d), capacitance and partialdichare quantity meaurement

Dry lihtnin impule voltae withtand tet (BIL) Dry power-frequency voltae withtand tet Meaurement of partial dichare quantity Tet of tap inulation Tihtne tet

Tihtne tet at the flane

Viual inpection and dimenional check

Packing - transportation

After tet and before packin, the buhin i cleaned of any oil or dut.

Thank to a pecial device to prevent the diffuion of the nitroen cuhion

out of the head and into the lower end of the buhin, each buhin

can be packed and hipped ecured in horizontal poition. Thi inure

minimal crate dimenion and reduced tranportation cot.

Proper protection i ued for oil ide hield. Buhin up to and inducin

170 kV are normally hipped in crate containin three piece.

Nameplate

Each buhin i provided with a nameplate, containin complete

electrical data and it erial number, in accordance with the requirement

of IEC standard. The tainle teel nameplate i ecured to the flane

with rivet and include the followin information (fi. 22):

D13

L9

30

30

K

L5

L8

30

L9

38

D13

D13

40

120

K

L5

L8

120

40

D13

30

PASSANTE-BUSHING-TRAVERSEE-DURCHFUHRUNG

50-60HzA

MILAN

ITALY

Kg

kV

1

23

4 5

7

6

8

N

SERIAL NR.

STANDARD REF.

CAP. C1 pF

DISSIPATION FACTOR AT 10 kV - 20 C %

MILAN - I TALY

CAP. C2 pF

Fig. 18: 52-170 kV bushing tail:draw rod connection

Fig. 20: 245 kV bushing tail:draw rod connection

Fig. 19: 52-170 kV bushing tail:bottom connection

Fig. 21: 245 kV bushing tail:bottom connection

Fig. 22: Identifcation Nameplate Fig. 23: Test Nameplate (from 123 kV above)

1. Buhin type

2. Inulatin voltae

3. Rated current

4. Max. moutin anle off

of the vertical

5. Weiht6. Blank (available)

7. serial number

8. Month - year of final tet

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Alstom Grid Bushings Pno Light Uk Web