Epoxy Post Insulators

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Post insulators made of cast epoxy and are used in outdoor and indoor conditions in AC installations and equipment. They are designed to operate in temperate climate, i.e. in between 25°C and +40°C and a relative humidity up to 90% in atmospheric air free of such pollutants as: dust, fumes, corrosive vapours and gases.
Post insulators consist of an insulating part and end fittings embedded in an epoxy mass.
Depending on the application and customer requirements, insulators are provided with various end fittings made of non-ferrous metals or stainless steel. They may also be provided with end fittings with other thread diameters in holes indicated by the Customer.

Dane techniczne

Designation

Maximum Operating Voltage

Rated Alternating Withstand Voltage with Dry Power Frequency

Nominal Bending Strength

Rated Lightning Impulse Withstand Voltage

Dimensions

Number of Sheds

Hole in Lower End Fitting

Hole in Upper End Fitting

Insulator Weight

P50

P6

A

B

D

H

 

kV

kV

kN

kN

kV

mm

mm

mm

mm

     

kg

JO8-75

12

38

5.8

8

75

100

60

130

100

4

M16

M16

1.2

JO8-125

24

50

6.45

8

125

100

65

100

210

6

M20

M16

2.3

JO16-75

12

38

11.6

16

75

90

70

115

130

4

M20

M16

1.6

JO25-95

24

50

19.5

25

95

110

85

140

175

6

M20

M16

3.2

JO25-125

24

50

20

25

125

115

85

140

210

6

M24

M16

3.7

 

 

Tracking Resistance at 2.5 kV

HV Arc Resistance

Martens Deflection Temperature

Charpy Resistance

Dielectric Strength

Bending Strength

h

s

°C

kJ/m²

kV/mm

MPa

0.5 ÷ 7.5

180 ÷ 190

>120

>10

>23

>100

 

Insulators are compliant with the following standards: PN-IEC 60273 (requirements) and PN-EN 60660 (U) (tests).