The 500kV mechanical DC circuit breaker of Sieyuan has been put into operation
2021-06-10
The 500kV mechanical DC circuit breaker developed by Sieyuan Electric Co., Ltd. has been put into operation at the 500kV Zhangbei Flexible DC Grid System Project since June 2020, and is performing at very high level ever since.
This product uses the AC breaking principle to achieve DC fault current breaking；The main branch circuit composed of 12 mechanical switches in series and an electromagnetic repulsion mechanism plus a vacuum chamber, it features of breaking current at 25kA, the fault current breaking time for less than 3ms, relatively low circuit resistance and extremely small on-state losses and no water cooling system required for heat dissipation.
As a result, the Zhangbei flexible DC project guarantees a strong and abundant green energy solution for the The XXIV Olympic Winter Games.
