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HD-7 Series 1 kV Thermal Shrinkable Busbar Protective Bushing

Principle of thermal shrinkage
Under the high energy radiation the linear polymer can form network cross-linkde structure.The mechanical strength,temperature,chemical solution and ageing resistance of cross-linked polymer are greatly improved, especially the acid and alkali resistance. 

Safety standard: 
UL224VW-1 C-UL CSA C22.20FT

Color
Black,red,blue,white,yellow,green and transparent. And other colors are subject to the clients’needs. 

Major performance indexes 

Test item

Measurement methods

Result

Tensile strength

 

≥12Mpa

Elongation at break

≥400%

Tensile strength after ageing

7days after laying in 158℃ oven

≥10Mpa

Elongation at break after ageing

≥300%

Thermal distortion test

131℃ ,1hour

≤25%

Thermal shock test

250℃ ,4hour

Non-fracture

Flexibility test

7days ,158℃ oven

Non-fracture ,no permanent distortion

Copper corrosion test

7days ,158℃ oven

No corrosion

Volume resistivity coefficient

 

≥1014Ω.cm

Insulation test

≥2.5KV Non-breakdown ,60 seconds

Power-frequency voltage resistance

≥12KV

Breakdown strength

≥25KV/mm

Insulation test after ageing

7days after laying in 158℃ oven

≥2.5KV Non-breakdown ,60 seconds

Power-frequency voltage resistance after ageing

≥12KV

Bending test at low temperature

-30℃ ,1hour

Non-fracture

Longitudinal shrinking ratio

200℃,3min shrink in oven

±10%

Eccentricity

 

≤30%

Flame retardation

VW-1

Full shrinking temperature

100℃(3min)


1KV MPG application 

Specification

Applicable busbar width (mm)

Dimension before shrinking(mm)

Dimension after shrinking (mm)

Standard packaging
(m/disc)

Application
(mm)

Internal diameter

Wall thickness

Internal diameter

Wall thickness

1KV MPG 30

20~30

30.2±0.8

0.45±0.15

14.7±1.0

0.9±0.2

50

16~29

1KV MPG 35

30~40

35.2±0.8

0.50±0.15

17.3±1.0

1.0±0.2

50

18~34

1KV MPG 40

40~50

40.0±1.0

0.50±0.15

19.8±1.0

1.0±0.2

50

21~39

1KV MPG 50

50~60

50.0±1.0

0.50±0.15

24.8±1.0

1.0±0.2

50

26~49

1KV MPG 60

60~70

60.0±1.0

0.65±0.15

29.8±1.0

1.1±0.2

25

35~55

1KV MPG 70

80~90

70.0±1.0

0.65±0.15

34.0±2.0

1.1±0.2

25

40~65

1KV MPG 80

90~100

80.0±1.0

0.65±0.20

39.0±2.0

1.2±0.2

25

45~75

1KV MPG 90

120

90.0±1.0

0.65±0.20

44.0±2.0

1.2±0.2

25

50~88

1KV MPG 100

140

100.0±2.0

0.65±0.20

49.0±2.0

1.3±0.2

25

55~95

1KV MPG 120

180

120.0±2.0

0.80±0.20

59.0±2.0

1.4±0.2

25

65~115

1KV MPG 150

240

150.0±2.0

0.80±0.20

74.0±2.0

1.4±0.2

25

80~145

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