| 摘要 |
<p>Transformer with power saving in standby condition having a primary winding connected to terminals (4) of a power supply line and a secondary winding (5) connected to terminals (6) for a load, provides that the primary winding includes a first group (2) of turns connected in series to impedance means (3) with the interposition of a switching mean (7) controlled by a control circuit (9) fit to detect the load power absorption by resistance means (8). The control circuit (9) is fit to switch the switching mean (7) in order to connect only the first group (2) of turns to the power supply line in correspondence of a load condition or to connect the first group (2)of turns in series to the impedance means (3) in correspondence of a no-load condition. <IMAGE></p> |
