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Transformer High Current Bushings

Type CFPT & CFCT

36kV

up to 40kA

IEC 60137-2008


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High current bushings for transformer

Features

Bushing Type CFPT

version PorcelainInsulator

Bushing Type CFCTversion CompositeInsulator

Trench RIG technology foroil-free, dry type bushings

Experience:

More than 10 000 pieces with this insulation in service for more

than 30 years (Generator Bushings with Ir max. 50kA)

Trench RIG technology (Resin Impregnated FiberGlass)

The active part consists of a solid core, made of fiber glass and

inserted concentric layers for the electrical field distribution.

The active part is impregnated under vacuum with a special epoxy

resin.

Advantages and benefits

Insulation (class F, 155C) according IEC 60085

Partial discharge


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TypeCF

PT&CFCT36kV

Comments

relatedtocolumns:

03:Bushing

stestvoltageat50Hz60sec.

07:Otherex

tensioncurrenttransformeronrequest

08,0

9:Brow

nglazedporcelain,

Graycoloronrequest

09:31mm/kVinstandard

12,1

3:L1

de

pendsonL4.

ThevaluesinthetablearevalidforL4=0mm.

IfL4>0mma

ddL4

toL1andL.

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

Highestvoltage(Um)

Maximumphasetoearthvoltage

BushingDryPowerfrequencyvoltage

withstand(AC)

TransformerPowerfrequencyvoltage

withstand(AC)

LightningImpulsewithstandvoltage

(BIL)

Ratedcurrent(Ir)

CTSpaceL4

ADArcingdistance(min.)

Standardcreepagedistance31mm/kV

MassApprox.

Cantilevertestload(min)

L

L1

L2

L4

D1

D2

D3

D4

D5

t

n

e

Numberofupperconnectionpads

Numberoflowerconnectionpads

Topterminal

Bottomterminal

Seeconnectionpage

kV

kV

kV

kV

kV

A

mm

mm

mm

kg

N

36

21

77

70

170

7800

340

1130

73

3150

855

320

535

0

220

290

335

265

390

15

12

22

4

1

2x18

4x18

page6

12000

1180

106

3150

855

320

535

0

300

400

450

345

490

20

12

22

6

2

2x18

4x18

page7

16000

1235

150

3150

855

320

535

0

400

535

590

445

590

22

16

22

10

2

2x18

6x18

page8

20000

1310

208

3150

855

320

535

0

525

620

680

570

730

22

16

22

14

2

2x18

8x18

page9

25000

1366

286

3150

855

320

535

0

625

720

780

670

830

22

16

22

16

2

2x18

12x18

page10

31500

1488

430

3150

1135

320

760

0

820

930

980

890

1050

22

24

25

22

2

2x18

16x18

page11

Standard:0,300

mm

mm

Page 4/ 16 40497231_00


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Dimensional Drawing

D4

D1

L4

L1

L

L2

n xt

e

D5

D2

D3

3x45

Page 5/ 16 40497231_00


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Standard Aluminum Connection 12000A

55

90

40

20

120

60

90

40

20

2

5

90

Air side

6 connections pads

Thickness 25mm

4x18

2x18

235 on pads

Oil side

Page 7/ 16 40497231_00


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55

904

0

20

150

50

90

40

20

25

120

50

Air side

10 connections pads

Thickness 25mm

2x1

8

335 on pads

6x18

Oil side

Page 8/ 16 40497231_00


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55

904

0

20

200

50

90

40

2050

25

120

50

460 on pads

2x18

Air side

14 connections pads

Thickness 25mm

8x18

Oil side

Page 9/ 16 40497231_00


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250

30

55

904

0

20

480

60

90

40

2060 60 60 60 60 60

670 on pads

2x18

12x18

22 connections pads

Thickness 25mm

Oil side

Air side

Page 11/ 16 40497231_00


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On Request

Every connection and interchangeability configuration can be done

Page 12/ 16 40497231_00


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G1/4 Air Outlet

Test Tap

Springs Lock System

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Technical data request

Mark the requested value

Um 24kV

36kV

52kV

Other

...

Up Transfo 50kV

70kV

95kV

Other

...

BIL 125kV

170kV

250kV

Other

...

Rated Current 7800A

12000A

16000A

20000A

25000A

31500A

Other

...

CT Space 0mm

300mm

Other

...

Terminals Material Aluminum

Copper

Other

...

Maximum Oil Temperature 90

70

80

100

Other

...

Bus Duct 60

70

80

Other

...

Mounting Vertical

Horizontal

Other

Page 14/ 16 40497231_00


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Trench France SAS16, rue du Gnral Cassagnou

B.P. 80070

F-68302 Saint-Louis Cedex France

Phone : +33 3 89 70 23 23

Fax : +33 3 89 70 23 59

www.trenchgroup.com40497231_00

Product Range

Bushings for

Power Transformers

up to 550 kV, 5000A

High Current Application

up to 52 kV, 40kA

Transformer to SF6

connection up to 550kV

Gas-insulated Switchgear

(GIS) up to 800 kV, 6000A

Generators

up to 36 kV, 50kA

Railways

Buildings , Wall

up to 245 kV, 5000A

Bushings according

Standard IEC 60137

Bushings according to

customers special specification

Quality

At Trench quality is a way of life.

Trench quality assurance

complies with the most stringent

standard of ISO 9001.

Certified by AFAQ since 1994

imprimerie de saint-louistroendl bieler

All rights reserved.

Brands and trademarks used in this document

are the property of Trench

Subject to change without prior notice.

The information in this document contains general

descriptions of the technical options which are not

necessarily available in every single case. The required

f h f b d f d h d d l

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