| 摘要 |
PROBLEM TO BE SOLVED: To provide an on-load tap changer the shielding capability of which has been stabilized, which suppresses an electrode contact of a main valve from wearing out by reducing the maximum value of the shielding current at the main valve where the number of times of shielding is large. SOLUTION: The changer is configured so that a main valve H opens when a resistant valve W1 on the tap side energized before change operation is closed and a resistant valve W2 on the tap side not energized before change operation is open. COPYRIGHT: (C)2007,JPO&INPIT
|
