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HD-7 Series 10kV & 35kV Thermal Shrinkable Busbar Protective Bushing

Major performance indexes of MPG series thermal shrinkable busbar protective bushing 

Item

Index

Hardness (Shore A )

<80

Density (kg/m3)

1.15x103

Water-absorbing rate (%)

<0.5

Full shrinking temperature (℃)

130±5

Radial shrinking ratio (%)

>50

Axial shrinking ratio (%)

<10

Tensile strength(Mpa)

>12

Crack elongation (%)

>400

Breakdown strength (kV/mm)

≥25

Volume resistivity(Ω.cm)

>1x1014

Cxygen index

≥30

Eccentricity (%)

30


Comparison between earth and phase distance before and after the use of MPG series

System voltage
(kV)

Ordinary insulation 
distance(mm)

Insulation distance after using PG10 series

Insulation distance after using PG10 series

To the earth (mm)

Between phase (mm)

To the earth (mm)

Between phase (mm)

10

120

80

70

50

40

22

220

160

120

105

75

35

320

-

-

200

150

Note:Information in the above table is for reference only. The actual data may vary due to the power distribution system and environment.

Application of 10kV MPG 

Specification

Applicable busbar 
width (mm)

Dimension before shrinking(mm)

Dimension after shrinking (mm)

Internal diameter

Wall thickness

Internal diameter

Wall thickness

10kV MPG15

10~15

15±1

0.8±0.2

6

1.6±0.2

10kV MPG20

12~18

20±1

0.8±0.2

8

1.6±0.2

10kV MPG25

20~30

25±1

1.0±0.2

10

2.0±0.2

10kV MPG30

30~40

30±1

1.0±0.2

13

2.0±0.2

10kV MPG40

40~50

40±1

1.0±0.2

15

2.2±0.2

10kV MPG50

50~60

50±2

1.2±0.2

20

2.2±0.2

10kV MPG60/65

60~70

65±2

1.2±0.2

24

2.5±0.2

10kV MPG80

80~100

80±3

1.2±0.3

32

2.5±0.2

10kV MPG100

100~120

100±4

1.2±0.3

40

2.5±0.2

10kV MPG120

150

120±4

1.2±0.3

48

2.7±0.3

10kV MPG150

200

150±4

1.2±0.3

60

2.7±0.3

10kV MPG180

max

180±5

1.2±0.3

70

2.7±0.3

10kV MPG210

max

210±5

1.2±0.3

80

2.7±0.3


Application of 35kV MPG 

Specification

Applicable busbar
width (mm)

Dimension before shrinking(mm)

Dimension after shrinking (mm)

Internal diameter

Wall thickness

Internal diameter

Wall thickness

35kV MPG30

30~40

30±2

2.0±0.3

13

3.5±0.3

35kV MPG40

40~50

40±2

2.0±0.3

15

3.5±0.3

35kV MPG50

50~60

50±2

2.0±0.3

20

4.0±0.3

35kV MPG60/65

60~70

65±2

2.0±0.3

24

4.0±0.3

35kV MPG80

80~100

80±3

2.2±0.3

32

4.0±0.3

35kV MPG100

100~120

100±4

2.5±0.3

40

4.0±0.3

35kV MPG120

150

120±4

2.5±0.3

48

4.5±0.3

35kV MPG150

200

150±4

2.5±0.3

60

4.5±0.3

35kV MPG180

max

180±5

2.5±0.3

70

4.5±0.3

35kV MPG210

max

210±5

2.5±0.3

80

4.5±0.3

 

 

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