| 摘要 |
<p>A motor driven tap changer has a signalling contact system with up to ten snap-action switches arranged in a plane and operated by a cam drum. They form the "one"-unit and the "ten"-units, and are connected to individual control and display elements When one of these switches is closed, the corresponding control or display element in the "one" or "ten" unit responds and is switched on by a further switch allocated to these units.</p> |
