Title :
Breakdown behaviour of polyethylene at dc voltage stress
Author :
Riechert, Uwe ; Eberhardt, Martin ; Kindersberger, Josef ; Speck, Joachim
Author_Institution :
Inst. of High Voltage & High Current Eng., Tech. Univ. Dresden, Germany
Abstract :
The paper deals with breakdown voltage characteristics of polyethylene in homogeneous electric fields. The breakdown voltage characteristic is measured with foils in a sphere-sphere arrangement both with dc voltage and with impulse voltage superimposed on dc voltage. The electrical strength was found to be dependent on the pre-applied dc stress and the polarity of the impulse voltage at the instant of their superposition. The impulse breakdown voltage of dc prestressed samples was compared to impulse breakdown voltage superimposed on dc voltage. The influence of insulation thickness and a lamination of polyethylene foils on dc breakdown behaviour was investigated. Moreover, the breakdown voltage was measured in short circuit experiments. The influence both of fall time and of rise time of dc recovery voltage is discussed in connection with the space charge effect
Keywords :
electric breakdown; polyethylene insulation; space charge; DC voltage; electrical breakdown strength; homogeneous electric field; impulse voltage; insulation thickness; lamination; polyethylene foil; prestress; recovery voltage; short circuit; space charge; sphere-sphere electrode; Breakdown voltage; Circuit testing; DC generators; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Polyethylene; Resistors; Space charge; Stress;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1998. ICSD '98. Proceedings of the 1998 IEEE 6th International Conference on
Conference_Location :
Vasteras
Print_ISBN :
0-7803-4237-2
DOI :
10.1109/ICSD.1998.709336
