| 摘要 |
For testing a tap changer (20) of a transformer (5; 6), which tap changer is designed to change a transmission ratio of the transformer (5; 6), the following steps are carried out: generating a test signal which is supplied to a winding (1-3; 10) of the transformer (5; 6) and to the tap changer (20). repeatedly actuating the tap changer (20) in order to change the transmission ratio with each actuation. determining a curve of an electrical measurement variable (I; l |
