US 11,984,290 B2
Circuit breaker
Ronald Niehoff, Oldenzaal (NL); and Harry Stokman, Aalsmeer (NL)
Assigned to EATON INTELLIGENT POWER LIMITED, Dublin (IE)
Appl. No. 17/435,055
Filed by Eaton Intelligent Power Limited, Dublin (IE); and DIRECT CURRENT B.V, Aalsmeer (NL)
PCT Filed Feb. 20, 2020, PCT No. PCT/EP2020/054428
§ 371(c)(1), (2) Date Aug. 31, 2021,
PCT Pub. No. WO2020/178032, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 1903018 (GB), filed on Mar. 6, 2019.
Prior Publication US 2022/0139644 A1, May 5, 2022
Int. Cl. H02H 9/00 (2006.01); H01H 9/54 (2006.01); H02H 9/02 (2006.01)
CPC H01H 9/548 (2013.01) [H02H 9/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A hybrid circuit breaker for interrupting a current in an electrical circuit line, the hybrid circuit breaker comprising:
an input terminal for connection to a power line and an output terminal for connection to a DC system;
a first solid state switching device connected to the input terminal;
a mechanical isolator relay arranged in series with the first solid state switching device and connected to the output terminal;
a crowbar circuit electrically connected between the output terminal and ground or mid-pole; and
a controller for controlling the first solid state switching device, the mechanical isolator relay and the crowbar circuit,
wherein the crowbar circuit comprises a second solid state switching device and a resistor arranged in series.