Patent ID: 8861162
Filing Date: 2014-10-14
Classification: H01H,H02H,H02J

Abstract:
1. A solid state power controller (SSPC) comprising: a solid state switching device (SSSD) configured to receive power from a main power bus; an electromechanical contactor electrically connected in series to the SSSD, wherein an output from the contactor is configured to provide a power output of the SSPC; an input power current sensor to measure current along the main power bus before the SSSD; an output power current sensor to measure current at the output side of the contactor; and a digital signal processor (DSP) based SSPC control engine configured to: turn off the SSSD in response to the SSPC being in an “off” state and, open the contactor in response to the SSPC being in the “off” state as determined based on the measured current from the input power current sensor, the measured current from the output power current sensor, and a contactor status received from the electromechanical contactor.