57 Series Vertical Clamp Type and Horizontal Clamp Type

Line Post Insulator

Standard: IEC60383, ANSI C29.1, ANSI C29.7

Voltage:15-45kV

Description

Vertical clamp type line post mounted upright on crossarms and structures

Horizontal clamp type line post assemblies for ratings 15 kV through 45 kV.

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ANSI CLASS	57-11	57-21	57-12	57-22	57-13	57-23
Creepage Distance (mm)	356	356	559	559	737	737
H – Height To Middle of Clamp Assembly	257	276	333	352	400	419
D – Diameter	146	146	160	160	160	160
C – Clamp Throat Width	102	102	102	102	102	102
Dry Arcing Distance(mm)	165	165	241	241	311	311
Cantilever Strength(kN)	12.5	12.5	12.5	12.5	12.5	12.5
Low Frequency Flashover Voltage-Dry(kV)	70	70	100	100	125	125
Low Frequency Flashover Voltage-Wet(kV)	50	50	70	70	95	95
Critical Impulse Flashover Voltage-Pos.,(kV)	120	120	160	160	200	200
Test Voltage to Ground(kV)	15	15	22	22	30	30
Maximum RIV at 1000KHZ(μv)	100	100	100	100	200	200