Bushings

Cable Box Bushing Range

A proven high quality range of porcelain insulated bushings for use inside protective cable boxes and fitted with high grade cork composite gaskets designed to seal against all transformer insulating fluids.

Compliance Standards

BS EN ISO 60137

BS 2562

Available Designs

Oil /Oil or Oil /Heat Shrink - for use on liquid filled transformers

The cable box side of the bushing can be enclosed in a filled cable box i.e. oil or compound or insulated with heat shrink insulation - if preferred.

Oil/Air - for use on liquid filled transformers

The cable box side of the bushing is designed to have extra creepage negating the need for further insulation. The user should select a corresponding air filled cable box from our range.

Air/Air – for use on dry-type resin transformers

Can also be used for special applications requiring no additional insulation at either end of the bushing.

Insulators

Ceramic insulators are porcelain brown-glazed.

Metalwork

All bushings utilise HDHC tin-plated stem conductors. Palm terminal are manufactured from tin-plated high copper content brass. Fixings and fasters are anti-corrosion plated.

Termination

Most bushing series can be supplied with screwed, plain or palm terminations - with a choice of number of cable take-offs.

Fixing

Bushings are supplied with clamps and gaskets designed to engage with transformer facing weld studs.

Range Summary

Range Number

kV

A

Application

BIL

AC

C12-O-400

12

250-400

Oil/Oil or Oil/Heat Shrink

75

28

C12-O-1600

12

250-1600

Oil/Oil or Oil/Heat Shrink

75

28

C12-O-2500

12

250-2500

Oil/Oil or Oil/Heat Shrink

75

28

C12-O-3150

12

250-3150

Oil/Oil or Oil/Heat Shrink

75

28

C12-O-5000

12

250-5000

Oil/Oil or Oil/Heat Shrink

75

28

C12-A-400

12

250-400

Oil/Air

75

28

C12-A-1600

12

250-1600

Oil/Air

75

28

C12-A-2500

12

250-2500

Oil/Air

75

28

C12-AA-630

12

250-630

Air/Air

75

28

Range Number

kV

A

Application

BIL

AC

C24-O-1600

24

250-1600

Oil/Oil or Oil/Heat Shrink

125

50

C24-O-2500

24

250-2500

Oil/Oil or Oil/Heat Shrink

125

50

C24-A-630

24

250-630

Oil/Air

125

50

C24-A-4000

24

250-4000

Oil/Air

125

50

C24-AA-250

24

250-250

Air/Air

125

50

C24-AA-1600

24

250-1600

Air/Air

125

50

Range Number

kV

A

Application

BIL

AC

C36-O-3150

36

250-3150

Oil/Oil or Oil/Heat Shrink

170

70

C36-A-1600

36

250-1600

Oil/Air

170

70

C36-AA-1600

36

250-1600

Air/Air

170

70

Note: Fully detailed drawings can be provided at time of enquiry