H - Electricity – 02 – H
Patent
H - Electricity
02
H
348/10
H02H 5/08 (2006.01) H01H 35/24 (2006.01)
Patent
CA 1314968
ABSTRACT OF THE INVENTION An electronic relay control circuit is provided for liquid cooled electric power transformers. The control circuit senses the rate of change of internal tank pressure and operates its relays in re- sponse to a sudden pressure increase. Relay control connections are provided for operating transformer trip and annunciator cir- cuits. The relay response is field adjustable.
588566
Foster Joseph F.
Hagerman Richard E.
Fetherstonhaugh & Co.
Qualitrol Corporation
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