Patent ID: 9609704
Date: 2017-03-28
CPC Classifications: H01H,H05B

Claim:
1. A load control device for controlling power delivered from an AC power source to an electrical device, the load control device comprising: a first electrical connection adapted to be electrically coupled to the AC power source; a second electrical connection adapted to be electrically coupled to the electrical device; a relay electrically coupled between the first and second electrical connections and configured to control the power delivered from the AC power source to the electrical device so as to generate a switched-hot voltage at the second electrical connection; a detect circuit electrically coupled to the second electrical connection and configured to generate a detect signal indicating a magnitude of the switched-hot voltage; a control circuit configured to generate a drive signal for attempting to open and close the relay, configured to monitor the detect signal, and configured to determine whether the relay is open or closed based on the detect signal; wherein the control circuit is further configured to perform a stuck closed procedure in response to determining that the relay is stuck closed, the stuck closed procedure comprising the control circuit attempting to close the relay, attempting to open the relay, monitoring the detect signal, and determining whether the relay is stuck closed.