<p>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 response to a sudden pressure increase. Relay control connections are provided for operating transformer trip and annunciator circuits. The relay response is field adjustable.</p>
申请公布号
DE68913726(D1)
申请公布日期
1994.04.14
申请号
DE1989613726
申请日期
1989.01.12
申请人
QUALITROL CORP., FAIRPORT, N.Y., US
发明人
HAGERMAN, RICHARD, E., PENFIELD, NY 14526, US;FOSTER, JOSEPH, F., FAIRPORT, NY 14450, US