Insulators

ANSI 57-1 Gray Porcelain Line Post Insulator

Product Overview

Gray ANSI 57-1 porcelain line post insulator with 356 mm creepage distance and 12.5 kN cantilever strength.

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Parameter	Unit	Value
ANSI class		57-1
Top groove diameter	mm	73 ± 3
Porcelain body diameter	mm	140 ± 5
Overall height	mm	229 ± 8
Creepage distance	mm	356
Cantilever strength	kN	12.5
Low-frequency dry flashover	kV	70
Low-frequency wet flashover	kV	50
Positive critical impulse flashover	kV	120
Negative critical impulse flashover	kV	155
RIV test voltage to ground	kV	15
Maximum radio influence voltage	µV	100