Title :
On-site cable testing with a resonant test set and an additional partial discharge measurement
Author :
Schichler, Uwe ; Borsi, Hossein ; Gockenbach, Ernst
Author_Institution :
Schering-Inst. of High Voltage Tech. & Eng., Hannover Univ., Germany
Abstract :
With an onsite voltage test, it is possible to evaluate polymer insulated cables after laying, repair or some years in operation. Onsite cable testing can be performed easily with frequency-tuned series resonant test sets which are still available for the testing of medium and high voltage cables. Some tested cables failed after a short time in operation although they had passed the previous voltage test without breakdown. A combination of the voltage test with an additional partial discharge (PD) measurement can increase the test efficiency, but the onsite PD measurement has a number of difficulties caused by ambient noise. The paper describes the results of onsite medium voltage cable testing with a frequency tuned resonant test set and an additional PD measurement with a special PD measuring system
Keywords :
electric breakdown; insulation testing; organic insulating materials; partial discharges; polymers; power cable insulation; power cable testing; test equipment; MV power cables; ambient noise; frequency-tuned series resonant test sets; insulation breakdown tests; measuring system; onsite cable insulation testing; partial discharge measurement; polymer insulation; voltage test; Breakdown voltage; Cables; Frequency measurement; Medium voltage; Noise measurement; Partial discharge measurement; Partial discharges; Resonance; Resonant frequency; System testing;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549302
