Bushings

DIN Bushing Range

Originally designed in Germany, this range of bushings was quickly adopted in Europe - as well as the Far East and Middle East Regions of the world. The design is typified by its use of a doughnut shaped oil seal compressed around a terminal ‘bolt’. The porcelain is shaped internally to retain the bolt and also to prevent it from rotating. The Standard range is limited if you require multiple cable take-offs, but Webster-Wilkinson Ltd can produce solutions to this and many more termination problems besides.

Compliance Standards

DIN 42530, DIN 42531, DIN 42532, DIN 42533, DIN 42534, DIN 42539, DIN 42541

BS EN ISO 60137

Available Designs

We can offer all designs contained in the relevant DIN Standards. Additionally, we are able to offer, in some instances, high creepage versions. Arcing horns can be provided for bushings of 12kV and above- if required.

Insulators

Ceramic insulators are porcelain brown-glazed.

Metalwork

All bushings normally utilise unplated (self-colour) conductors and terminals. Conductors can be tin-plated by special order.

Termination

Standard air-side terminations are normally screwed, round conductors. We can supply palm or flag terminals - if required. Oil-side termination is either via draw lead or via screwed, round conductor or flat threaded lugs.

Fixing

Up to 12kV, bushings are normally supplied in kit form and are of two-piece porcelain design. 12kV bushings and above are fixed via a formed light gauge clamp and fixing pieces which locate on the transformer facing – studded by others. Fixings and fasters are available in a range of materials and finishes.

Range Summary

Range Number

kV

A

DIN Standard

Creepage

BIL

1DT250WW

1.1

250

42530

55

20

1DT630WW

1.1

630

42530

70

20

1DT1000WW

1.1

1000

42530

75

20

1DT2000WW

1.1

2000

42530

75

20

1DT3150WW

1.1

3150

42530

75

20

 

 

 

 

 

 

3DT250WW

3.6

250

42539

120

40

3DT630WW

3.6

630

42539

120

40

3DT1000WW

3.6

1000

42539

125

40

3DT2000WW

3.6

2000

42539

125

40

3DT3150WW

3.6

3150

42539

125

40

3DT4500WW

3.6

4500

42539

130

40

 

 

 

 

 

 

10NF250WW

12

250

42531

290

75

20NF250WW

24

250

42531

440

125

30NF250WW

36

250

42531

580

170

 

 

 

 

 

 

10NF630WW

12

630

42532

290

75

20NF630WW

24

630

42532

440

125

30NF630WW

36

630

42532

630

170

 

 

 

 

 

 

10NF1000WW

12

1000

42533

290

75

20NF1000WW

24

1000

42533

440

125

30NF1000WW

36

1000

42533

640

170

 

 

 

 

 

 

10NF2000WW

12

2000

42533

290

75

20NF2000WW

24

2000

42533

440

125

30NF2000WW

36

2000

42533

680

170

 

 

 

 

 

 

10NF3150WW

12

3150

42533

290

75

20NF3150WW

24

3150

42533

440

125

30NF3150WW

36

3150

42533

680

170

 

 

 

 

 

 

52/250WW

52

250

42534

1080

250

52/630WW

52

630

42534

1080

250

52NF1000WW

52

1000

42534

1080

250

52NF2000WW

52

2000

42534

1080

250

52NF3150WW

52

3150

42534

1080

250

 

 

 

 

 

 

24/5000WW

24

5000

42541

470

125

36/5000WW

36

5000

42541

555

170

24/8000WW

24

8000

42541

470

125

36/8000WW

36

8000

42541

555

250