IS 5350 : Part 3 : 1971 : Dimensions of Indoor and Outdoor Porcelain Post Insulators and Post Insulator Units for Systems with Nominal Voltages Greater Than 1000 V - Part III : Outdoor Pedestal Post Insulators

1. Scope

1.1 This standard ( Part III ) applies to pedestal type post insulator and post insulator units of ceramic materials intended for outdoor service in electrical installations or equipment operating on alternating current with a rated voltage greater than 1000 V and a frequency not greater than 100 Hz. The insulators covered by this standard are primarily intended for use in isolators (disconnectors) or as bus bar or as fuse supports.