Insulator Shotgun Rifle

The Shotgun/Rifle test determines the ability of an insulator to sustain 50% of its mechanical rating while being subjected to a 22-caliber rifle fire or 12-gauge shotgun blast from 30 feet away.

Prior to the test, samples are individually inspected and an increasing voltage is applied until electrical flashover is reached.

We place a horizontal string of three insulators under a continuous tensile load and fire at each from 30 feet away.