Modes of intermediate-frequency vacuum arc and characteristics of arc voltage under transverse magnetic field

作者：Zhu Liying^*; Wu Jianwen

来源：Proceedings of the CSEE, 2011, 31(1): 131-137.

• Arc mode
• Arc movement
• Arc rotation
• Arc voltage
• Cathode spot
• Cathode surface
• Contact opening
• Current increase
• High frequency HF
• High-frequency noise
• Intermediate frequencies
• Oscillating circuits
• Single-frequency
• Transverse magnetic field
• Transverse magnetic field (TMF)
• Vacuum arc
• Vacuum arcs
• Vacuum interrupters
• Voltage characteristics

Arc mode and voltage characteristics of intermediate frequency vacuum arc (400~800 Hz) in cup-type vacuum interrupter with transverse magnetic field (TMF) have been studied. Experiments were carried out under condition of a shield-removed cup-type TMF vacuum interrupter with a contact diameter of 66 mm and a contact opening distance of 4 mm in a single-frequency oscillating circuit. Experimental results showed if the current increases to a certain value, the arc rotates distinctively. If not, obvious arc rotation could not be observed. Arc movement characteristics are mainly affected by the magnetic field. Arc movement is not the reason to generate high-frequency arc voltage noise. Only when the cathode spots occupy the entire cathode surface, could arc voltage generate high-frequency noise. The correlations between the arc voltage and the amplitude and frequency of the current were achieved in this study. ? 2011 Chin. Soc. for Elec. Eng.

• 出版日期2011