Alstom Grid Bushings Pno Light Uk Web

bushings

PNO

Condenser Bushings

52-245 kV

OIL-TO-AIR - Oil-impregnated Paper IEC STANDARDS 60137 AN ALSTOM COMPANY

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 of 45° inclination off the vertical. Dein, component and manufacturin technoloy promote an averae 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 Condener Buhin, Oil-Imprenated Paper (OIP) oil-to-air application

145

Inulation cla in kV

650

BIL in kV

800

Rated current in A

 X

Cantilever load: N = Normal H = Heavy

 Y 

Oil ide hield: N = Normal L = Removable upward (for 245 kV only)

Voltage and current ratings Rated voltae rane for PNO buhin, normal cantilever load, i 52 to 170 kV. Heavy cantilever load i 52 to 245 kV. kV. PNO buhin, for

Customer Benefts

a rated voltae, are deined in order to have

• Buhin with loner lifetime and hiher reliability • Utilization under extreme weather condition (lower pour-point value) • No oxidation phenomena typical with mineral oil • No performance reduction with ae

the ame overall dimenion for all the normal ervice current. There are three connection alternative for the conductor:

• Draw lead connection for and • Draw rod connection for • Bottom connection, uin a riid conductor, 800

1250 A

1250 A

for 1600 A Uin uitable acceorie, any draw rod 1250 A buhin can be converted to draw lead

buhin, only for minimum under flane leeve lenth, and vice vera. Minimum 1250 A draw

lead conductor ection are lited in fi. 11.

GRID 1

CONDENsER BUsHINgs

PNO

Main Features PNO: IEC Standards Condenser Bushings Rane 52 to 245 kV 1

Current up to 1600 A

Fig. 1: Bushings 245 kV Heavy Cantilever load

Oil-Imprenated Paper Air ide: porcelain inulator or compoite inulator

2

Oil ide: epoxy rein inulator Fig. 2: Bushings 52 to 170 kV Normal Cantilever load

Partial dichare: max. 5 pC at 1.5 Un synthetic imprenatin oil DDB Dodecylbenzene fully micible with tranformer oil

3

1

Provided with power factor tap (voltae tap upon requet) Draw lead for 800-1250 A - draw rod for 1250 A

4

2

bottom connection for 1600 A application Head made of pecial UHV filter primatic la with oil level indication viible at any anle of iht

5

3

Flane made of cat aluminum alloy. standard anle of intallation max of 45° off vertical 4

5

6 7 6 7 1. HV Terminal 2. UHV lter la 3. Porcelain 4. OIP Condener 5. Windin tube 6. Power factor tap or voltae tap 7. Flane 8. Epoxy rein inulator 9. Oil ide hield

2 2

8

8

9 9

CONDENsER BUsHINgs

PNO

Manufacturing

 Air side

The main electrical component i the condener body, manufactured

The air ide inulator i made of brown porcelain. grey porcelain or

uin a continuou heet of pure kraft paper, wound around a central

compoite inulator (rein fiberla envelope covered by ilicone hed)

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

i available upon requet. The typical creepae ditance i uitable for

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

very heavy polluted atmophere. The hed confiuration i an alternatin

maximum. A erie of aluminum foil are coaxially inerted between

type: hort-lon hed. Thi i the mot effective olution, proven by

the layer of the paper, to achieve the bet poible ditribution of 

alt pray tet. The hed profile complie with IEC 60815 - 1986

the radial and lonitudinal electrical radient between the central

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

tube and the flane, which i rounded. The windin i made by

in order to meet standard or pecial requirement, are ued for buhin.

computer-controlled machine, with ubequent machinin to achieve

Multiple piece are lued uin epoxy rein, without ue the of aket,

the final hape. After windin, each buhin i individually aembled

and the final porcelain i conidered a a inle piece (it pae

and placed into an oven and then proceed under vacuum for the

iEC 60233 - 1974,

claue 6 tet).

appropriate period of time. Each one i then imprenated with ynthetic oil, which ha been deaed and proceed o that it ha

Flange

a maximum water content of 3 ppm. Each buhin i placed under

The flane i made of cat aluminum, and i equipped with the

preure to inure thorouh imprenation and to tet that it i properly

followin acceorie:

ealed. After imprenation, the buhin head i filled with a nitroen

• Lifting holes • Power factor tap, teted at kV for  (fi. 3), and/ or voltae tap, upon requet (fi. ) • Buchholz relay connection: 1/2” a outlet plu • Oil sampling plug (for ≥ kV buhin).

cuhion. Thi proce i automatic and computer controlled.

2

60

4

Top terminal The tandard buhin top terminal i made of aluminum without

145

any urface treatment. Upon requet, it can be upplied in tinned or ilvered copper. Draw lead or draw rod type buhin ( 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

4

7

6

6

5

5 8

4

7

contact and i ecured to the buhin head by crew. In bottom connected buhin (1600 A), the inner non-removable rod alo act a top terminal.

Head and oil level indication The metal component of the head are made of a cat aluminum alloy. Buhin have an oil head reervoir, primatic in hape, made of  3

boroilicate la, and containin a UHV filter, which allow for an eay

2

3

1

2

4 1

check of the oil level even from a ditance and at any anle of iht. Fig. 3: Power Factor Tap

Fig. 4: Voltage Tap

1.

Cloin and roundin cap Meaurement electrode 3. Inulation tap 4. gaket 5. Tap ane 6. Buhin ane 7. Lat layer

1.

2.

2.

Cloin and roundin cap Meaurement electrode 3. Inulation tap 4. gaket 5. Fillin plu 6. Buhin ane 7. Connection to internal layer 8. Tap external houin

3

CONDENsER BUsHINgs

Oil side

PNO

Fig. 6: DDB dodecylbenzene synthetic oil

The oil ide envelope i made of a molded epoxy rein. Thi rein i saturated lateral chain

a two-part compound conitin of a rein bae and a hardener; the filler material i quartz and. The epoxy rein envelope permit hape, thickne and dimenional tolerance not poible with porcelain. Under flane leeve lenth for CT accommodation, different from

---(CH2)9-13 ---(CH3)

tandard, i available upon requet. In thi cae, the rounded part i obtained by mean of a metallic tube or directly by the lat metallic

Benzenic rin

layer inide the condener body.

Oil side shield

Insulating uid

The bottom end of the buhin i hielded by a proper deflector, made

We have over 20 year of field-proven experience with oil-imprenated

of aluminum alloy. It i deined to reduce the electric field tre

paper buhin uin ynthetic oil dodecylbenzene (DDB). DDB oil i a

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

mixture of monoalkylbenzol: a benzenic rin with lateral aturated chain

the tranformer windin and the buhin itelf. Buhin up to and

(fi. 6). Thi oil ha uperior dielectric and inulatin characteritic than

includin 170 kV have a deflector interated in the epoxy rein tail.

mineral oil:

245 kV 1600 A buhin have an aluminum hield that can be moved

• superior and contant dielectric qualitie (non ain) • Hih a aborption under electrical field tre and hih temperature • Neliible toxicity • Excellent bioderadability • Full micibility with tranformer mineral oil • A very low pour point and hiher flah point • No PCB content

upward. The ame hield i available, upon requet, for 800 and 1250 A buhin.

 Assembling The mechanical couplin amon all the part of the buhin i made by mean of prin placed into the head of the buhin. 245 kV buhin are alway aembled uin (air ide) porcelain cemented to flane (fi. 5) a well a the one for heavy cantilever (“H”) load. The cement ued i quick ettin monocalcicaluminized type. All cemented urface, potentially in contact with the external environment, are ilicone ealed (fi. 5). 1 5 Fig. 5: Cemented porcelain

2

Porcelain Cement 3. Metal cemented rin 4. Flane 5. silicone ealin

3

1. 2.

4 4

4 5

CONDENsER BUsHINgs

PNO

Gaskets Made of Viton®, a fluorocarbon rubber elatomer (FPM), o-rin type. They are compatible with all the fluid they are in contact with (buhin imprenatin ynthetic oil and tranformer mineral oil). Air ide aket are carefully protected, by mean of a ealin, aaint influence of pollutin weather element. For pecial requirement, uch a low ambient temperature (down to - 55°C), pecial o-rin are ued.

 Arcing horns Adjutable arcin horn are available upon requet. The upper arcin horn i fixed by mean of one crew ued to ecure the top terminal, while the bottom one i fixed on a proper threaded flane hole (fi. 7).

Transformer oil synthetic oil DDB ued in buhin i completely micible with tranformer mineral oil. Thi oil mut have a water content le than

Fig. 7: Discharge distance for a bushing equipped with arcing horns

15 ppm for voltae up to 145 kV and le than 10 ppm for 170 kV and

above rated voltae. It dielectric trenth mut be hiher than 60 kV, accordin to IEC 60156.

Tests All buhin have electrical characteritic and are teted in compliance with the latet edition of IEC 60137 standard: inulated buhin for alternatin voltae above 1000 V and Main National standard.

   0    1   ±

   H

Type tests

• Meaurement of dielectric diipation factor (tan

d),

capacitance and partial dichare quantity before and after the erie of type tet

• Wet power-frequency voltae withtand tet • Temperature rie tet • Verification of thermal hort-time current withtand • Cantilever load withtand tet • Tihtne tet • Verification of dimenion

5

CONDENsER BUsHINgs

PNO

PNO Range 52 to 245 kV

   e   z     i    S    d    a    e    H

Dimensions Type

   g   d    n   n    a     i    t    n    t    s    h    h    i    t    g     i    l   w   y    e    e    r    s    D   l     (   u   g    a    t    l    L    I    p    m   o    B    i   v

   m    e   -    e    t    o    s    t   y   -    g    a    S    e    t    l    n   l    a   e     i    l    o   v    n     i    g    d    h    a    e    t    m   t    t    l    r    o   o    a   a    N   V    R   e kV

kV

kV

1250

52

30

250

450

71

550

1250

84

650

1250

98

750

X

1050

460

kg

1155/1075

32

1600

X

4539/4459

100

1405/1325

X

5333/5253

0

1595/1515

X

X

--/8224

0

1250

1600

38

320

3000

450

2000

600

3000

750

2000

900

2000

1000

1000

1450

43 2000

52 80 84

3150

1600

95 106 105

3150

1600

120 150 120

130

4000

1600

162

-

X

4000

48

1250

--/2310

mm

29 2000

1250

X*

m

40

1250

X*

   %    0    g    1      n    e     i    /    t    g   +    r    a    r    a     )    e    e    h   e    p    c    c    s    n    o   d   u     i   x    i    t    d   a    t    a    s    t    l     (    i    M   a    H   d

25

1250

X

1250

1600

3886/3806

0

X

800 142

N

1250

X*

1600 245

985/925

X

325

1250

800 1250

3100/3040

50

X

800 170

1600 245.1050.

X

1600

800 170.750.

275

N

   t    h    g     i    e    W

1000

X*

X

1250

1600

760/700

X

800 145

2359/2299

0

1600

800 145.650.

X

X

230

   d    a    o    l    r    e   v    e   y    l     i   v    t    a    e   n    H   a    c

1000

X*

X

1250

1600

610/550

X

800

123

1722/1662

50

1600

800 1250

X

X 185

   d    a    o    l    r    l    e   v    a   e    l     i    m    t    r    n    o   a    N   c

mm

X 140

1250

1600

123.550.

X*

800 58

mm

   e    c   y   v    )    n    d    a   a    e    t    a    /    s    l    o     i    a   l    d    r    m    g   r    e   v    n   o   e     i    l    c     i    r    N    t    A   r    o   n    :    f    C    (    a    c

1000

1600 100

   e    c   y   v    )    n    d    a   a    e    t    a    /    s    l    o     i    a   l    d    r    m    e    m   g   r    e   v   u    o   e    l    m   a    N    i    p     i    t    r    n    n   e     i    e    f    o    M   r    c    (    a    c

X

1250

800 1250

95

800

325

42

1600 100.450.

mm

1600 72.5

    )    t    e    k    c    o    p    T    C     (  .    n     i    m    K

X

1250

800 1250

   n    o     i    t    m   c    e    o    t    t    n    o   n    B   o    c

kV

800

1600

72.5.325.

   d   y     )    s    a    c    e    l    d    0    n    o    e    6   w    t    r   u    r    a    e   q    o    n    r   w   n    d     f   w   e    o    o    d     (    a     i    r    n    t    r    i    t    d    f    e    a    e    l    c    c    d    t    r    n   e    s    g    b   e    e    a    h   a     i    d    n    n     i   x    t    t   y   w    l    n    g    e   o     i    n    r    o    i    o    l    D   p   w  v    F   c    R   o    c

A

800 52.250.

   s   u    o   u    n     i    t    n    o    c    t    n    d    e    e    t    r    a   r   u    R   c

230 4000

265 248

(*) poible only for K minimum - Note: for ratin not lited, conult u.    d    e    a   z    e    i    H   S

Dimensions Type

D1

D2

D3

D4

D5

kV

kV

kV

A

kV

800 52.250.

1250

100

185

225

1600 1250

100

185

225

1600 1250

115

250

290

1600 1250

115

250

290

1600 1250

145

290

335

1600 1250

145

290

335

1600 1250

175

400

450

1600

1. HV terminal

30

30

30

30 40

M12

D10

D11

D13

L2

L3

L4

L5

mm

mm

mm

N

N

kg

m

100

60

95

35

100

125

60

95

35

115

175

70

130

230

35

115

200

70

130

230

35

145

225

70

130

230

35

145

225

70

130

-

40

800 245.1050.

170

40

800 170.750.

30

100

R7

-

40

800 145.650.

170

40

800

123.550.

30

35

D7

-

40

800 100.450.

170

40

800

72.5.325.

30

D6

270

50

195

325

-

1. HV terminal

110

200

175

250

32 32 32 32 32 32 40

-

860

695

915

80

240

1010

845

80

240

1080

1300

80

325

1240

1465

80

325

1490

1715

80

475

1680

1905

80

475

2525

2850

80 125

50

-100 -100 -100 -100

50

100

25

855

25

1090

50

1255

1505

F

6

16

14

6

16

16

8

16

16

8

16

19

12

16

19

12

16

22

12

23

14

-

-

1695

50

100

2550

80

-

180

130 -

-

125

2745

705

-

125

1850

n.

-

125

1660

t1

mm

-

125

1410

L9

-

125

1245

L8

-

125

1065

L6

620

M12

1. Top closing cap

2. Copperlug 6. Multi blades

6. Multi blades 3. Pin

3. Pin

2. Draw rod

4. Belleville washers

2. Belleville washers 4. Belleville washers

3. Solid rod 5. Winding tube

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

6 6

5. Winding tube

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

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

CONDENsER BUsHINgs I

PNO

I I

1000 900 800     ) 700    2    m600    m     ( 500    n    o    i 400    t    c    e 300    S 200 100 0 200

900

k=500 k=0

700

rated voltage 245 kV

rated voltage 170 kV

rated voltage < 170 kV

800

k=500 k=0

800 700

    ) 600    2    m500    m     (

    )    2600    m    m500     (

   n400    o    i    t    c 300    e    S

   n400    o    i    t    c 300    e    S

200

200

100

100

0 200

300

400

500

600

700 I (A)

800

900

1000 1100 1200 1300

0 200

300

400

500

600

700 I (A)

800

900 1000 1100 1200 1300

k=500 k=0

300

400

500

600

700 I (A)

800

900 1000 1100 1200 1300

Fig. 11: Draw lead conductor sections

M12

1. HV terminal 2. Copperlug

M12

1. HV terminal

6. Multi blades

3. Pin

6. Multi blades 3. Pin

1 - Top closing plate

2. Draw rod

4. Bellev ille washers I

I

2 - Springs

4. Belleville washers

5. Winding tube

3 - Solid rod

5. Winding tube

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

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

Fig. 14: 245 kV bushing head: bottom connection

D5 D4

      4       L

I

D5

D4       4       L

1. Air drainin plu 2. Liftin hole 3. Power factor tap       2       L

      3       L

      6 L

      C

1

      2       L

      3       L

      6       L

      C

      3       D

      2       D

1

2

      3       D

2

      2       D

3

3

      1       t       K

      1       t

D7

+

D1       K

D7

  °  4  5

D1       5       L

D6

  °  4  5

      5       L

n holes

D6 R7

R7       8       L

F

      5

      1        t

      8       L

D10

D10

D11

D11

Fig. 15: PNO Bushings 52 through 170 kV

Fig. 16: PNO Bushings 245 kV

F+8

Fig. 17: Flange fxing holes

7

CONDENsER BUsHINgs

PNO

  y

Routine tests

• Dielectric diipation factor (tan ), capacitance and partial dichare quantity meaurement • Dry lihtnin impule voltae withtand tet (BIL) • Dry power-frequency voltae withtand tet • Meaurement of partial dichare quantity • Tet of tap inulation • Tihtne tet • Tihtne tet at the flane • Viual inpection and dimenional check  d

       K        K

      9        L

D13       5        L

      5

D13

       L

      0       3

      8        L

      0       2       1

      8        L

30

40

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

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

Packing - transportation After tet and before packin, the buhin i cleaned of any oil or dut. Thank to a pecial device to prevent the diffuion of the nitroen cuhion out of the head and into the lower end of the buhin, each buhin

        9

        L

can be packed and hipped ecured in horizontal poition. Thi inure minimal crate dimenion and reduced tranportation cot.

D13

Proper protection i ued for oil ide hield. Buhin up to and inducin

D13

170 kV are normally hipped in crate containin three piece.

Nameplate

        0         3        0        2        1

Each buhin 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 flane with rivet and include the followin information (fi. 22):

       0        3

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

Fig. 22: Identifcation Nameplate 2. 8

PASSANTE-BUSHING-TRAVERSEE-DURCHFUHRUNG 1 N°

kV

2

7

A 3

Kg

5

Buhin type Inulatin voltae 3. Rated current 4. Max. moutin anle off  of the vertical 5. Weiht 6. Blank (available) 7. serial number 8. Month - year of final tet 1.

ITALY

4

Fig. 21: 245 kV bushing tail: bottom connection

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

50-60Hz

40

38

SERIAL NR.

M I L AN - I T A L Y

STANDARD REF. CAP. C1

pF

CAP. C2

DISSIPATION FACTOR AT 10 kV - 20° C

6

Followin the acquiition of PAssONI & VILLA, Altom grid now offer a lare portfolio of condener buhin for AC or DC operation. If you require any further information, pleae addre your querie to AN ALSTOM COMPANY

 Alstom Grid Worldwide Contact Centre www.rid.altom.com/contactcentre Tel.: +44 (0) 1785 250 070 www.grid.alstom.com 8 8

rpv@altom.com

To contact the manufacturer Viale suzzani, 229 20162 MILANO (Italy) Tel.: +39 02 661 221 Fax: +39 02 647 09 06 Email: rpv@altom.com

GRID

pF %

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