Low Voltage Pin Type Insulators



Catalog No. P55-1GR P55-2GR P55-3GR P55-4GR P55-5GR
Dimensions (inches)
Pin Hole Diameter 1 1 1 1 1
Recommended Pin Length 4 4 5 5 6
Leakage Distance 4 5 7 9 12
Dry Arcing Distance 2-1/4 3-3/8 4-1/2    
Mechanical Values (Ultimate)*
Cantilevel Strength (Ibs.) 3,000 2,500 2,500 3000 3000
Electrical Values (kV)
Typical Voltage Class 4.8 7.5 11.5 13.5 15
Low Frequency Dry Flashover 35 45 55 65 80
Low Frequency Wet Flashover 20 25 30 35 45
Impulse Flashover, Positive 50 70 90 105 130
Impulse Flashover, Negative 70 85 110 130 150
Low Frequency Puncture Voltage 50 70 90 95 115
Radio Influence Voltage Data
Test Voltage, RMS to Ground (kV) 5 5 10 10 15
Maximum RIV at 1000 kHz (kV) 50 50 50 50 100
Packing & Shipping Data
Net Weight Each(Ibs.) 1.28 1.50 2.03 3.5 5.5
Packed Weight Each (Ibs.) 1.37 1.57 2.30 3.67 7.33
Standard Package Quantity 48 32 18 12 8

*Maximum recommended working load = 40% of cantilever rating
  GR=Gray glaze, Radio – Treated


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