| 摘要 |
<p>FAIL-SAFE CIRCUIT FOR TAP-CHANGING TRANSFORMER REGULATING SYSTEM A transfer switch, for disconnecting a source of energy from a tap-changing transformer and connecting it directly to the load which was energized by the transformer, upon actuation by a fail-safe circuit which has detected improper opertation of the tap changer. Upon actuation, a contact block is moved by a spring, damped by a dashpot, to sequentially engage stationary contacts to sequentially insert an impedance in series with the transformer and load, then connect the load directly to the source, and then disconnect the series impedance connection between the transformer and the source.</p> |
