TWO-WIRE ELECTRONIC SWITCH

摘要

P The two-wire power switch, mounted in series with a load (1) between two poles (P, N) of an alternating electrical network, conventionally comprises a main triac (20) between two terminals (2a, 2b ) of the switch, the conduction of which is triggered by that of an optotriac (21), with a delay on the zero crossing of the voltage between the terminals (2a, 2b) determined by the breakdown voltage level of the Zener series (22a, 22b). The switch comprises a power supply (3, 4) with a rectifier bridge (31) connected directly to the terminal (2a), and through a capacitor (30) to the terminal (2b). BR/ According to the invention , an auxiliary triac (130), in parallel on the capacitor (30), is triggered by the optotriac (21) at each zero crossing of the voltage between the terminals (2a, 2b). This optimizes the speeds, switch open and closed, separately. /P