High Voltage Pin Type Insulators



Catalog No. P56-1GR P56-2GR P56-3GR
ANSI Class 56-1 56-2 56-3
Dimensions (inches)
Leakage Distance 13 17 21
Dry Arcing Distance 7 8-1/4 9-1/2
Minimum Pin Height 6 7 8
Mechanical Values (Ultimate)*
Cantilevel Strength (Ibs.) 2,500 3,000 3,000
Electrical Values (kV)
Typical Voltage Class 23 23 34.5
Low Frequency Dry Flashover 95 110 125
Low Frequency Wet Flashover 60 70 80
Impulse Flashover, Positive 150 175 200
Impulse Flashover, Negative 190 225 265
Low Frequency Puncture Voltage 130 145 165
Radio Influence Voltage Data
Test Voltage, RMS to Ground (kV) 15 22 30
Maximum RIV at 1000 kHz (kV) 100 100 200
Packing & Shipping Data
Net Weight Each(Ibs.) 7 9.5 15
Packed Weight Each (Ibs.) 8.8 12.5 19
Standard Package Quantity 6 2 2

*rus accepted

*Maximum recommended working load = 40% of cantilever rating
  GR=Gray glaze, Radio – Treated
  Standard 1-3/8″ Diameter Threads


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