Electromechanically controlled automatic transfer switch and...

Details Electromechanically controlled automatic transfer switch and... Electromechanically controlled automatic transfer switch and...

H - Electricity

02

J

348/17, 306/278

H02J 9/06 (2006.01) H01H 3/26 (2006.01)

Patent

CA 1201521

ABSTRACT OF THE DISCLOSURE An electromechanically controlled switch assembly including an automatic, three postion, removable, transfer switch and a three position, manually operated bypass switch assembly. Electromechanical controls are utilized to sense the position of both switches, including whether or not the bypass switch is being manually switched to the normal or an emergency source of power, whether or not the power sources are available, and whether or not the transfer switch is properly located within its supporting frame for normal opera- tion, completely isolated, or isolated from the load but in the correct location for testing. In one embodiment the elec- tromechanical controls interlock the operation of the switches and assure safety of operation of the assembly by switching the automatic transfer switch to an open or neutral position if it is being isolated, returned to normal, or if the operator is switching the bypass switch to connect the load to a source of power other than that to which the transfer switch is connecting the load.

427889

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