SCiBreak got some good news for Christmas, a significant milestone was reached. For the first time, a 10 kA current was interrupted against a recovery voltage of 40 kV with SCiBreak’s technology. After ramping up the ratings of the prototype during the whole year of 2017, we thus reached our initial target.
The current was successfully commutated to the energy absorption branch within 3 ms after the trip order was given to the circuit breaker. This was achieved thanks to the ultra-fast main interrupter which is operated with our Thomson-coil actuator.
In the picture below, the measured resonant current reaches the same value as the fault line current at 800 us. At that moment, the arc is extinguished and the voltage across the breaker increases to a voltage level of nearly 40 kV.
These current and voltage levels correspond to the test that will be performed at the KEMA laboratory next june. To be continued!