NBR15643 DE 08/2026

Isoladores poliméricos são constituídos por um único material isolante (isoladores de resina) ou por dois ou mais materiais isolantes (isoladores compostos). Os materiais isolantes são, geralmente, materiais orgânicos com ligações cruzadas, sintetizados a partir da química de carbono ou do silício, formando o corpo isolante. Os materiais isolantes podem ser compostos por materiais orgânicos contendo diversos ingredientes inorgânicos e orgânicos, como cargas e extensores. This Standard is applicable to polymeric insulators for AC systems with a nominal voltage greater than 1 000 V (frequency less than 100 Hz) and DC 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 composite insulators with solid and hollow core and resin insulators. Hybrid insulators with ceramic core and polymeric housing are also included, while coated insulators (e.g. with RTV silicone rubber coatings) are not included in this Standard.