HD-7 Series 1 kV Thermal Shrinkable Busbar Protective Bushing

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)

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