FIELD: electricity.
SUBSTANCE: scheme for testing of inductive electric meters is based on a transformer with stepping-up and stepping-down secondary windings, to the primary winding of this transformer powered-on by the alternating current mains a circuit is connected which is composed of in-series storage capacitor and thyristor, the capacitor through a hi-voltage diode is coupled to the stepping-up secondary winding of the transformer and charged from it at negative half-periods of the mains voltage, and a control junction of the thyristor is connected to the stepping-down secondary winding of the transformer through the opposite in-series stabilitron and diode, as well as a resistor, at that the thyristor is opened during positive half-periods of the mains voltage with a certain time delay from these half-periods beginning.
EFFECT: provision of nonsymmetrical composite load for negative and positive half-periods of the mains voltage which allows testing of inductive electric meters with rotating discs in order to check their protection from reverse motion of the above discs.
2 dwg
