Effect of contact material on the extinction of vacuum arcs under line frequency and high frequency conditions
| Autor: | E.-D. Wilkening, M. Lindmayer, D. Heyn |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Range (particle radiation)
Transient recovery voltage Chemistry business.industry General Engineering Analytical chemistry Electrical engineering Industrial and Manufacturing Engineering Electrical contacts Electronic Optical and Magnetic Materials Breaking capacity Amplitude Extinction (optical mineralogy) Electrical and Electronic Engineering business Line (formation) Voltage |
| Zdroj: | Thirty-Sixth IEEE Conference on Electrical Contacts, and the Fifteenth International Conference on Electrical Contacts. |
| DOI: | 10.1109/holm.1990.113057 |
| Popis: | In two different test arrangements the influence of different contact materials (Cu/Cr and Cu/Cr with additives of Zn, Sb, and Li/sub 2/O) on reignition or extinction of vacuum arcs was studied. The following line frequency conditions were achieved in a synthetic Weil-Dobke circuit: a transient recovery voltage (TRV) of 36 kV, and currents of 800-4800 A, 50 Hz. High-frequency (HF) currents were generated by means of all L-C circuit, with amplitudes of several hundred amperes and frequencies in the range of several hundred Kilohertz. The reignition voltage at the HF current zeros and its statistical distribution are evaluated. Cu/Cr 75/25 shows the highest values, in agreement with the tendency at 50 Hz. As at line frequency, the additives reduce the reignition voltage, and hence, increase the reignition tendency. Cu/Cr with higher Cr content has a smaller breaking capacity. > |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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