FIELD: electricity.
SUBSTANCE: half-wave circuit for electric meter testing for uncontrolled power outfeed, containing a bridge circuit of two circuits parallel-connected to the circuit network of a series-connected storage capacitor and a charge thyristor and a discharge thyristor in the diagonal of the bridge circuit, has been claimed. The storage capacitors are connected directly to the conductors of the network - phase and zero. The circuit includes a charge and discharge thyristor control unit, where the control unit includes a resistor voltage divider connected to the phase conductor of the network, a comparator which output is connected to the discharge thyristor control electrode through the RC differentiating circuit and a transistor amplifier with a transformer output. The output of the comparator is also connected to a series-connected inverter, a transistor amplifier with a transformer output with two separate secondary windings connected to the control electrodes of the charge thyristors. Series-connected diodes and control current-limiting resistors are used in the control electrode circuits of all three thyristors, and power diodes can be additionally connected in series with the anodes of the charge thyristors.
EFFECT: simplified device and ensured operation reliability in view of the presence of residual voltages, moreover, variable due to the spread of capacitances of storage capacitors at the end of their discharge, use of the claimed device will allow the developers of new generation electric meters to avoid uncontrolled power consumption and great economic damage to the power supplying organizations of the country.
2 dwg
