초록 ▼

Disclosed is an automatic transfer switch (ATS) having "operate," "test" and "isolate" positions for the switch per se. A handle selects one of the positions and a mechanical linkage couples the ATS and the handle to one another. In the improvement, the linkage has first and second members for apply

Disclosed is an automatic transfer switch (ATS) having "operate," "test" and "isolate" positions for the switch per se. A handle selects one of the positions and a mechanical linkage couples the ATS and the handle to one another. In the improvement, the linkage has first and second members for applying motive force to the switch. The mechanical linkage has first and second rotary driver devices in engagement with the first and second members, respectively, thereby providing redundant switch-positioning mechanisms. The new ATS may be combined with a bypass switch having "normal," "auto" and "emergency" contact positions. A switch interlock linkage extends between the transfer switch and the bypass switch and includes a bypass plate and a transfer plate coupled to one another by a bar. The bypass switch includes a pivot-mounted first bypass interlock member obstructing substantial movement of the bypass plate when the bypass switch electrical contacts are in the "normal" position. And the transfer switch includes a pivot-mounted first transfer interlock member obstructing substantial movement of the transfer plate when the transfer switch electrical contacts are in the "emergency" position.

대표청구항 ▼

[ What is claimed:] [1.] In an automatic transfer switch having "operate," "test" and "isolate" positions and including a handle for selecting one of the positions and a mechanical linkage coupling the switch and the handle to one another, the improvement wherein:the switch includes first and second

[ What is claimed:] [1.] In an automatic transfer switch having "operate," "test" and "isolate" positions and including a handle for selecting one of the positions and a mechanical linkage coupling the switch and the handle to one another, the improvement wherein:the switch includes first and second driven members for applying motive force to the switch; andthe linkage includes first and second rotary driver devices in engagement with the first and second members, respectively, thereby providing redundant switch-positioning mechanisms.