| 摘要 |
FIELD: measuring equipment.SUBSTANCE: invention relates to electrical measurement and can be used to assess suitability of newly developed electricity meters against uncontrolled power take-off from power grids. Device for testing inductive electric meters comprises in branches of a bridge circuit storage capacitors, leads of which on one side are connected to grid conductors, on other side to a thyristor in diagonal of bridge circuit. Storage capacitors are connected in series to throttles, which are connected to grid conductors, in diagonal of bridge circuit there is an additional anti-parallel connected thyristor. Thyristor control circuit includes, connected to grid, a two-link integrating circuit with controlled time constant, wherein second capacitor of said circuit is anti-parallel connected to diodes of two separate thyristor control circuits, each of which comprises serially connected to said diodes diode thyristors and step-down transformers, primary windings of which are shunted with imbued with extra current-damping diodes, and secondary windings are connected to "control electrode-cathode" junctions of thyristors through limiting low-ohmic resistors. Proposed device should be used in development of electricity meters, not sensitive to distortions of their readings.EFFECT: significant simplification of bridge circuit, thyristor control device and elimination of secondary power source.1 cl, 4 dwg |
