BritEng
Electrical
- Nov 2, 2005
- 8
Hi,
We have had an insulation breakdown in an 11kV VCB. We have sent this away for investigation and the culprit was a stress shield mounted on the end of the vacuum bottles. The clear shields had black traces on them. We have been informed that Polycarbonate will sooner or later give up it's carbon when surrounded by an electrical field. Has anyone else experienced this or have any further information?
Many Thanks
We have had an insulation breakdown in an 11kV VCB. We have sent this away for investigation and the culprit was a stress shield mounted on the end of the vacuum bottles. The clear shields had black traces on them. We have been informed that Polycarbonate will sooner or later give up it's carbon when surrounded by an electrical field. Has anyone else experienced this or have any further information?
Many Thanks