Flow Velocity Distribution of High-Temperature Gas with Various Currents in Sealed Arc Extinguishing Chamber

In a direct current circuit breaker (DCCB), the arc requires to be extended and extinguished rapidly by applying the magnetic field1. However, the re-ignition can be caused by the high-temperature gas which reflected from the wall in the sealed arc extinguishing chamber2-3. To prevent those inflows from causing the re-ignition, it is necessary to decrease the gas temperature of the inter-electrode area at the beginning. Moreover, the flow velocity can cause reflections at the sidewalls in the sealed arc extinguishing chamber and flow back to the inter-electrodes area, it is considered to cause re-ignition. One re-ignition cause is the flow velocity, and it is unclear how this velocity varies with the current value.