Connection switch for use in transformer, has main interrupter that is opened when auxiliary interrupters are closed and opened at side of respective conductive and non-conductive connections before transition operation

摘要

The switch has a set of movable contacts (M1, M2) with a connection selector. An auxiliary switch (S) is formed via fixed contacts that are provided between the movable contacts (M1) and transition resistance (R1), and via the movable contacts (M2) for a section of one fixed contact. A main interrupter (H) is connected between the movable contacts (M2) and a neutral point, where the main interrupter is opened when auxiliary interrupters (W1, W2) are closed and opened at the side of respective conductive and non-conductive connections (2, 3) before transition operation.