Affiliation:
1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
Abstract
In this study, to investigate vacuum arc characteristics under different diameter-to-gap distance ratios ( D/ g), experiments are conducted on axial magnetic field (AMF) contacts with varying D/ g. The peak current value ranges from 15 to 35 kA. The experimental results show that the ability of AMF contacts to control the arc decreases with D/ g. Furthermore, the 2/3 coil contact can control the arc under long gap distances, whereas the cup-shaped contact cannot effectively control the arc under long gap distances. The arc energy and noisy period duration decrease with increasing D/ g. The arc voltage of the 2/3 coil contact at the peak moment is always the lowest compared to the cup-shaped contact and the 1/2 coil contact, and the arc voltage of the 2/3 coil contact at the peak moment has an approximate power function relation with D/ g. The simulation results show that the AMF distribution changes from saddle shape to bell shape with decreasing D/ g. The 2/3 coil contact is more suitable for high-voltage vacuum interrupters (VIs), while the cup-shaped contact is more suitable for medium-voltage VIs.
Funder
National Natural Science Foundation of China
Cited by
2 articles.
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