ON-LOAD VOLTAGE REGULATION TAP SWITCH FOR TRANSFORMER AND SWITCH CONTROL METHOD

摘要

The present invention relates to an on-load voltage regulation tap switch for a transformer, comprising a main switch group, a switch contact protection branch and a switch control circuit, wherein the main switch group comprises a plurality of switch contacts, one end of the switch group is connected to a corresponding transformer winding tap, and the other end of the switch group is connected in parallel and is then connected to a power source; the switch contact protection branch is a series circuit formed by a plurality of groups of diodes and auxiliary switch contacts, and is respectively connected to both ends of a corresponding main switch in parallel; and the switch control circuit is composed of a power source, a single chip microcomputer and a peripheral circuit, and controls all of the main switches and auxiliary switches to act in a certain time sequence, so as to complete the switching of the transformer windings. Compared with the existing on-load voltage regulation tap switch, the on-load voltage regulation tap switch for a transformer of the present invention has the advantages of a fast tapping speed, no inrush current during tapping and a continuous current, and has a simple operation, high reliability, small volume, light weight, low costs, etc.