BigPatents India

The present invention provides a high-performance partial discharge detection device which is user-friendly and compact and which allows detection of the electromagnetic waves caused by partial discharge, over a wide bandwidth with a simple constitution and a favorable S/N ratio. The waveguide antenna which receives electromagnetic waves that leak fro- the insulating spacer is attached to the outer circumferential face of the insulating spacer. The waveguide antenna is constituted by a waveguide portion and a coaxial cable connectcrr which is installed on the waveguide portion. The waveguide portion has a metal short-circuit plate provided at one end thereof., and an opening formed at the other end thereof ,which, covers part of the outer circumferential face of the insulating spacer. No. of Pages : 26 No. of Claims : 8