Summary
This article deals with the study of the electric field during restrike process in the 33 kV DC vacuum circuit breaker during the passage of the fault current. For this purpose, the 3D models are built by the aid of COMSOL Multiphysics program. The paper investigates the performance of the DC vacuum circuit breakers, emphasizing electric analyses. The study introduces focusing on the arc extinction process and critical parameters influencing circuit breaker functionality. Various factors are investigated to analyse key aspects such as electric field distribution, contact radius effect, contact geometry influence on the field and contact resistance. The findings demonstrate that the enhancements in model simulation can significantly improve the efficiency and reliability of vacuum circuit breakers performance. In addition, the influence of contact resistance on the temperature rise is discussed. Alloy materials namely, Tungsten-Copper (WCu), Copper-Chromium (CuCr) and Oxygen-Free
Read more Read lessElectronic (OFE Copper) are selected to be contacts of the vacuum interrupter.
Thermal characteristics directly inform DC VCB commutation circuit design by dictating necessary parameters like contact separation, commutation current injection (e.g., LC circuit), and energy absorption to prevent arc re-ignition and ensure successful interruption, preventing failure by managing heat and charge build-up in the vacuum gap.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A3_10167_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Egypt |
| Study committees | |
| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
GOUDA Ossama - Cairo University, Egypt; HAMDY Ahmed - Engineering for Petroleum and Process Industries (ENPPI)Company, Egypt
