Automatic transfer control device

Details Automatic transfer control device Automatic transfer control device

H - Electricity

02

J

348/17

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

Patent

CA 1123940

ABSTRACT OF THE DISCLOSURE An automatic control transfer device for selec- tively energizing an electrical distribution system from a pair of electrical power sources. The device includes means for sensing electrical conditions on both of the source and programmable electronic digital logic to selec- tively energize associated circuit interrupters for switch- ing a distribution system between the two sources. A plu- rality of time delay functions are provided utilizing a separate oscillator for each function, each oscillator pro- viding input to a common digital counter. The device senses the status of associated circuit interrupters to provide interlocking and lockout functions as well as proper switch- ing commands for either two-or three-circuit interrupter systems. Means are also provided for testing the entire device without initiating an actual source transfer.

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