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Fuzhou Lingt Trading Co.,Ltd.               
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porcelain line post insulators

porcelain line post insulators

  • line post insulators are manufactured and tested to the requirements of ANSI Standard C29.7
  • Color:brown and gray



 MAIN DIMENSTIONS AND STANDARD PARTICULARS 

ANSI Class

57 -31

57-32

57-33

57-34

57-35

Fig. No.

1

2

3

4

5

Leakage distance/ mm

356

559

737

1016

1143

Dry arcing distance/ mm

165

241

311

368

438

Cantilever strength/ kN

12.5

12.5

12.5

12.5

12.5

Average flashover voltage

Low-frequency

Dry/kV

70

100

125

140

160

Wet/kV

50

70

95

110

130

Critical-impulse

Positive/ kV

120

160

200

230

265

Negative/ kV

155

205

260

340

380

Radio-influence voltage date

Test voltage to Ground/ kV

15

22

30

44

44

Maximum RIV at 1.000kc/μV

100

100

200

200

200

Net weight each approx./kg

9.5

12.5

15.7

18.8

21.5

 


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