Suspension Porcelain Insulators Anti-Pollution

Fig

2

1

2

Class ANSI

52-3

52-4

52-5

Unit spacing (H) mm

146

146

146

Nominal diameter (D) mm

255

255

255

Nominal Creepage Distance (mm)

432

432

432

Combined M&E strength (kN)

80

80

111

Tension proof test load (kN)

40

40

55.5

Mechanical impact strength (n.m)

6

6

7

Low frequency flashover voltage

Wet (kv)

60

60

60

Dry (kv)

100

100

100

Critical-Impulse flashover voltage

Positive (kV)

150

150

150

Negative (kV)

160

160

160

Low frequency punctured voltage

120

120

120

Radio-Interference-

Voltage

Test Voltage to ground (kV)

10

10

10

Maximum RIV at 1MHz (µV)

50

50

50

Weight (kg)

6.2

6.2

7.7

Applicable standard: ANSI C29.2