ANSI 55-1 Pin Type Porcelain Insulator

Spacing (S)

3 ¹/₂  inch

90 mm

Diameter (D)

3 ¹/₄  inch

82.6 mm

Leakage distance (C/D)

4 inch

102 mm

Dry arcing distance：

2 ¹/₄  inch

57 mm

4 inch

102 mm

Combined M&E strength:

3,000 lb

13.3 kN

Low frequency dry flashover voltage:

35 kV

Low frequency wet flashover voltage:

20 kV

Critical impulse flashover voltage, positive:

50 kV

Critical impulse flashover voltage, negative:

70 kV

Low frequency puncture voltage:

50 kV

Type application voltage:

7.2 kV

RIV test voltage rms to ground

Maximum RIV at 1000 kHz

5 kV

50 μV

Corona visual lest P/C

Approx. net weight per unit

1.2 lb

0.54 kg