Circuit within switch mains part for powering electronic components - has auxiliary winding arranged on throughflow transmitter in which voltage is induced during switching on and off

摘要

The circuit contains a throughflow transmitter comprising prim. and sec. windings together with an auxiliary winding (4) to which is connected a rectifier (5). On its output side, the rectifier is connected to electronic components. The electronic components are powered by a start circuit (11) of a mains rectifier of the switch mains part when switched on . The auxiliary winding (4) and the prim. winding (1) of the throughflow transmitter are wound in the same direction. A capacitor (6) is connected in parallel to the electronic components. USE/ADVANTAGE - Electronic components do not require auxiliary voltage source.