Product Information

Specification

About

Line posts are support-type insulators and are installed on wooden, concrete, or metal cross arms. These are especially designed for distribution lines with typical application voltages ranging from 25 kV to 45 kV, as per standard ANSI (C29.7). Their strong and robust structural form provides unequal mechanical and electrical characteristics. Nearly impervious to puncture, these insulators are generally used in areas with hot lighting zones. Designs have a cantilever resistance ranging from 6.6 kN to 12.5 kN.

Specification:

ANSI CLASS: 57-1
Dry arcing distance in inches: 6.5
Leakage distance in inches: 14
Cantilever strength pounds: 2800
Typical application voltage: 25
Low-frequency dry flashover: 90
Low-frequency wet flashover: 60
Critical impulse flashover positive: 130
RMS to ground, kV: 15
Maximum RIV at 1000 kHz: 100


Note 1: ANSI 70 gray is standard; brown or white are available by request.
Note 2: Insulators can be requested with an M20 thread size.
Note 3: Available with a short or long stud, sold separately.