Class ANSI

Mian Demension in (mm)

leak-
age
Dist-
ance
in
(mm)

Min.
Pin
Le-
ngth
in
(mm)

Canti-lever Stre-ngth 1b(KN)

Average
Flashover
Voltage

Power
Freq-uae-ncy Pun-
cture Volt-age
KV

Radio influence Voltage

D

H

d

d1

h

R1

R2

Power Freq-uency

Critcal
Impulse

Test Volt-age
To
Gro-
und
KV

Max Riv
At
1M
Hz
V

Dry kv

Wet kv

Pos-itive kv

Nag-ative kv

56-1

7^1/2
(191)

5^3/4
(146)

3^1/2
(89)

1^1/2
(35)

2
(51)

3/4
(19)

9/16
(14)

13
(330)

6
(152)

2500
(11)

95

60

150

190

130

15

100

56-2

9
(229)

6^1/2
(165)

4
(102)

1^3/8
(35)

2
(51)

3/4
(19)

9/16
(14)

17
(432)

7
(178)

3000
(13.2)

110

70

175

225

145

22

100

56-3

10^1/2
(167)

7^1/2
(191)

4
(102)

1^3/8
(35)

2
(51)

3/4
(19)

9/16
(14)

21
(533)

8
(203)

3000
(13.2)

125

80

200

265

165

30

200

56-4

12
(305)

9^1/2
(241)

1^3/8
(35)

2
(51)

3/4
(19)

9/16
(14)

27
(685)

10
(254)

3000
(13.2)

140

95

225

310

185

30

200

56-5

13^1/2
(343)

12^1/2
(318)

1^3/8
(35)

2
(51)

3/4
(19)

9/16
(14)

34
(864)

12
(305)

3000
(13.2)

175

125

270

340

225

44

200