NON-LINEAR DUMMY LOAD FOR MONITORED AC LOADS

摘要

A dummy load (606) is disclosed for an electrical system presenting a load voltage (602) to an appliance (604). A shunt network (610, 622) is arranged to shunt the load voltage. A circuit (612-620) is arranged to detect the load voltage and to bias the shunt network to a low impedance (622) when the load voltage is below a predetermined value, and to bias the shunt network to a high impedance when the load voltage is above that value. The load (606) finds particular application ameliorating the effect of false "on" indications in traffic lamp controller circuits (200).