| 摘要 |
FIELD: electricity.SUBSTANCE: calibration device for induction-type electric meters of active energy includes transistors switching capacitor discharge current and controlled by modulated HF pulse generator. The device features bridge design, with first and second branches connected in parallel to electric network and switching a series of capacitor and bidirectional transistor switch out of two similar transistors connected in parallel opposition. The first branch of bridge circuit is connected to phase conductor of network by bidirectional transistor switch, the second branch is connected by capacitor, and diagonal of the bridge circuit includes controlled symistor (bidirectional thyristor), four transistors and symistor are controlled by control unit synchronised by network voltage.EFFECT: enhanced precision of calibration.20 dwg |
