FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical measurement and can be used to assess suitability of newly developed electricity from uncontrolled power selection (rollback) of power grids. Half-wave circuit for testing electric meters on electric power extraction, containing a bridge device of two parallel connected to network chains with identical storage capacitors, turned on in-series thyristor installed in diagonal of bridge circuit, and control unit by switching thyristor. Branch of bridge circuit includes in-series connected together with storage capacitors and inductors of charging diodes chains, and thyristor in diagonal of bridge circuit includes storage capacitors in series to network. Control of thyristor switching takes place after charge in positive half-period of mains voltage in negative half-period near transition point of AC voltage through zero level, for which is used transformer primary winding of which through limiting resistor is connected to network, and its secondary winding is connected to “control electrode-cathode” junction of thyristor through series connected diode and extra resistor.
EFFECT: technical result consists in simplification of unwinding device with high energy efficiency.
1 cl, 3 dwg
