Busch rotary dimmer, flush-mounted installation boxes and inserts, inserts for Busch dimmers, Busch rotary dimmer flush-mounted, RLC, 60-420 W With incremental encoder and soft-locking. With intelligence for universal operation. For incandescent lamps, 230 V halogen lamps and low-voltage halogen lamps with conventional or electronic transformers. Short-circuit proof, overload proof. Power extension possible via parallel-connected load power on the output side with a 6594 U power module up to 735 W/VA. Operation possible via rotary extension 6592 U, without central plate. Nominal voltage: , +10 % / -10 % Nominal frequency: 50 Hz/60 Hz Nominal power: 60 - 420 W/VA IEC 60669-2-1, British Standard EN 60669-2-1