LIGHTING CONTROLS

• Main Author: AYDEMIR, Tolga
• Format: Patent
• Language: English; French; German
• Published: 08.12.2021
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION

A lighting control (4) for selectively supplying an AC input voltage to an external lighting load. A controllable switching element (34, 36) is between mains live input (16) and mains live output terminals (22, 24). An earth leakage power supply (26) includes a switch mode power supply, connected between the mains live input terminal (16) and a mains earth terminal (18), that selectively passes a leakage current between the mains live input terminal (16) and the mains earth terminal (18) to generate a DC output voltage (42). The earth leakage power supply (26) also includes a current monitor that measures the leakage current and generates a feedback signal having a first value when the leakage current is below a threshold value and a second value otherwise. The switch mode power supply enables the leakage current when the feedback signal has its first value, and disables it otherwise. A wireless controller (32) operates the controllable switching element (34, 36) in response to a received control signal, wherein the DC output voltage (42) generated by the switch mode power supply is supplied to the controller (32).