Abstract
The present paper describes detection by the AE (acoustic emission) sensor of partial discharge in the prefabricated joint, one of the accessories for XLPE cables, which is composed of factory-formed parts. Since the prefabricated joint can be installed in a short time, an increasing number of such joints have been used on power transmission line. However, the interface between the parts of prefabricated joint tend to exhibit weak points because of the structure peculiar to this type of joint.
We provided the AE sensor for practicability in comparison with conventional electrical defect detection methods. In coure of the present study, a method for locating a defect using multiple signals from the AE sensors was developed and its validity was evaluated by the dielectric breakdown test.
