Load equalising adjustment circuit for trigger and power switch circuit low voltage (LV) installations

摘要

The circuit (1) includes a load equaliser which is fed by a current supply source (11) coupled to a full-wave rectifier (12) and a charge capacitor (CL). A load resistance (20) is connected in parallel with the capacitor. The load resistance is coupled to a switching transistor (21) and a resistance (24). A varying resistance voltage is supplied to a microprocessor (22). The voltage variations serve as a control signal which is utilised by the microprocessor for direct control of the transistor (21) in order to keep the current flow constant in the resistance. The processor supplies a clocked output signal to the transistor.