Standards Development

Scope

This International Standard is applicable to polymeric insulators for a.c. systems with a nominal voltage greater than 1 000 V (frequency less than 100 Hz) and d.c. systems with a nominal voltage greater than 1 500 V whose insulating body consists of one or various organic materials. Polymeric insulators covered by this standard are intended for use both on HV overhead lines and in substations, in both indoor and outdoor applications. They include solid core, hollow core and resin insulators. Hybrid insulators with ceramic core and polymeric housing are included, while coated insulators (e.g. with RTV silicone rubber coatings) are not included in this standard.The object of this standard is- to define the common terms used for polymeric insulators;- to prescribe common test methods for design tests on polymeric insulators;- to prescribe acceptance or failure criteria, if applicable;These tests, criteria and recommendations are intended to ensure a satisfactory life-time under normal operating and environmental conditions (see Clause 5). This standard shall only be applied in conjunction with the relevant product standard.