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12-40.5 kV Outdoor-indoor High Voltage Through-wall Bushing

The 12-40.5 kV high voltage through-wall bushings is used in the power distribution equipment of three-phase AC system power station and substation with rated voltage 12-40.5 kV and frequency 15-60 Hz, for the conductive part to pass through partition, wall or other grounding objects for insulating, supporting as well as fixing and connecting of external conductors (buses). It should be installed in a place with ambient temperature from -40¡ãC to +40¡ãC, and altitude not more than 1,000 m.

Execution standard of product: GB/T 12944-2011 High Voltage Ceramic Wall Bushings

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Electrical properties of bushings:

Rated voltage

kV

Power frequency voltage        kV

Lightning impulse withstand voltage (peak)

kV

Dry withstand in 1 min

Wet withstand in 1 min

Breakdown

Visual corona

12

47

30

75

-

80

24

75

50

120

14.8

125

40.5

110

80

176

25.8

195

 

Main properties and dimensions

Model

Drawing No.

Rated voltage

kV

Rated current

A

5s short-time current

kA

Main dimensions

mm

Outdoor creep distance

mm

L

l1

l2

b

¦Ä

¦Ä1

Number

d1

a1

a2

No. of holes

l3

d2

A

D

CWWL-12/630

1a

12

630

12

520

360

158

40

8

-

1

13

20

40

2

95

14

175

2-115

230

CWWL-12/1600

1b

12

1600

30

520

360

158

63

12.5

10

2

14

15

30

4

115

14

200

4-200

230

CWWL-12/2000

1b

12

2000

40

600

365

158

100

10

10

2

18

25

50

4

115

14

200

4-200

230

CWW-24/2000

2a

24

2000

40

855

600

255

100

10

10

2

18

25

50

4

115

14

200

4-250

370

CWW-24/3150

2b

24

3150

60

855

600

255

100

10

10

3

18

25

50

4

115

15

220

4-250

380

CWW-24/4000

2c

24

4000

70

855

600

255

100

10

10

4

18

25

50

4

115

15

220

4-250

380

CWW-40.5/1600

2a

40.5

1600

30

1200

1035

478

63

10

10

2

14

15

30

4

75

15

220

4-245

650

CWW-40.5/2000

2a

40.5

2000

40

1200

1035

478

100

10

10

2

18

25

50

4

115

15

220

4-250

650

CWW-40.5/3150

2b

40.5

3150

60

1200

1035

478

100

10

10

3

18

25

50

4

115

15

220

4-250

650

CWW-40.5/4000

2c

40.5

4000

70

1200

1035

478

100

10

10

4

18

25

50

4

115

15

220

4-250

650

Model description: CWWL refers to outdoor-indoor stain resistant through-wall bushing of aluminum conductor; CWW refers to outdoor-indoor stain resistant through-wall bushing of copper conductor; In terms of the fraction after dash, the numerator is rated voltage (kV), and the denominator is rated current (A).

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