Electromechanically controlled automatic transfer switch and bypass switch assembly
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United States of America Patent
Stats
-
Dec 27, 1983
Grant Date -
N/A
app pub date -
May 17, 1982
filing date -
May 17, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electromechanically controlled switch assembly including an automatic, three position, 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 operation, completely isolated, or isolated from the load but in the correct location for testing. In one embodiment the electromechanical 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.
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