Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1982-05-17
1983-12-27
Scott, J. R.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
H02J 700
Patent
active
044233361
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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Iverson James R.
Pinotti Terry L.
Tell Ernest L.
Gabala James A.
Gealow Jon C.
McGraw-Edison Company
Scott J. R.
Tuttle Jon F.
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