APARELHO E PROCESSO DE CONTROLO DA ENERGIA DURANTE A SUBIDA RAPIDA DE PRESSAO EM TRANSFORMADORES ARREFECIDOS POR LIQUIDO

摘要

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.