GOST 9920-1989
A.c. electrical installations for voltage from 3 to 750 kV. Creepage distance of external insulation

Standard No.

GOST 9920-1989

Release Date

1989

Published By

RU-GOST R

Latest

GOST 9920-1989

Scope

This standard applies to electrical installations designed after 07/01/90, three-phase alternating current frequency 50 Hz classes at

GOST 9920-1989 history

• 1989 GOST 9920-1989 A.c. electrical installations for voltage from 3 to 750 kV. Creepage distance of external insulation