| Summary: | Insulating covers are collective protective equipment widely used in the maintenance of energized aerial electrical networks. The insulating covers can be divided in rigid or flexible. Using them along with other insulating means they allow carrying out repairs without interrupting the electric service. The present work relates essential aspects established in the international normative to achieve the adequate performance of rigid and flexible insulating protectors. It describes the experiences obtained in the individual electrical laboratory tests carried out in the CIPEL High Tension Laboratory in a measurement period of five years. As a result, the main insulation rigid and flexible covers used in Cuba and causes of rejection are identified at the laboratory level and measures are proposed that, in the authors' opinion, can improve the good condition of the protective element and increase its useful life, which represents an increase in operator safety and an improvement in the quality of the executed works.
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