| 摘要 |
<p>POLYPEHASE SWITCH ARRANGEMENT Disclosed is a family of polyphase outdoor interrupter switch arrangements suitable for service in power systems rated up to 34.5 kv with but a single interrupting switch unit per phase. Two insulators are mounted on a base member with one insulator supporting a switch blade hinge assembly and the other insulator supporting an electrical jaw contact and interrupting unit. A linkage arrangement mounted to the hinge assembly connects the movable blade to an insulating push rod. The two supporting insulators remain stationary when the switch operates, and only the insulating push rod moves to provide the motive force. The insulating push rod is connected to a lever mounted on a polygon-shaped (preferably hexagonallyshaped) shaft which is mounted for rotation on the base member. A drive lever and connecting linkage is also connected to the shaft. A movable operating rod is connected to a remote switch operator and to the connecting linkage so that movement of the operating rod rotates the shaft to cause the push rod to pivot the switch to an open position for example. A unique clamping arrangement is provided to permit the various levers to be rigidly affixed to the shaft at any longitudional position without the need for special machining of the shaft. After the switch is open, the insulating push rod and lever form an over-center toggle which prevents the switch blade from being pushed back into the stationary electrical contact as a result of external forces such as wind, etc. An alternative embodiment of the present invention is designed for triangular configurations of high-voltage distribution lines. In this embodiment, a center base member projects upwardly to support one of the switch arrangements of the three-phase system. The center base member is formed in two parts which are initially joined together for factory calibration and adjustment, but which can be disassembled during shipment in such a manner that no further adjustment is required when the switch arrangement is reassembled in the field.</p> |
