The following line post insulators comply with the ANSI Standard. The glaze colors of the insulators are brown or light gray. The dimension of neck for 57-1, 57-2, 57-3 is in accordance with "F". The dimension of neck for 57-4, 57-5 is in accordance with "N".
Dimensions:
Diameter (D): 5 3/4 Inches (146mm)
Height (H): 9 Inches (229mm)
Leakage Distance: 14 Inches (356mm)
Dry Arcing Distance: 6 1/2 Inches (165mm)
Mechanical Values:
Cantilever Strength: 2,800Pounds (12.5kN)
Cantilever Strength Routine Test: 1,000Pounds (5kN)
Electrical Values:
Typical Application Voltage: 25kV
Low Frequency Dry Flashover Voltage: 80kV
Low Frequency Wet Flashover Voltage: 60kV
Critical Impulse Flashover Voltage, Positive: 130kV
Critical Impulse Flashover Voltage, Negative: 155kV
Radio Influence Voltage Data:
Test Voltage RMS to Ground: 15kV
Maximum RIV at 1000 kHz: 100μV
Packing and Shipping Data:
Net Weight, Approximate: 5.2kg
