A METHOD OF TESTING THE INTEGRITY OF A SECOND SEAL OF AN ELECTRICAL INSULATOR

摘要

The present disclosure relates to a method of testing the integrity of a second seal (2) of an electrical insulator (8); the method comprising: filling a first volume (10) of the insulator with a gas comprising a detectable component, closing a second closable opening (4), evacuating a second volume (11) through a first closable opening (5), and determining that a second seal (6) between the second sealing element (2) and the body (8) or the closed second closable opening (4) is leaking if the detectable component is detected in the evacuated gas from the second volume (11). An electrical insulator is also disclosed.