The Working Principle of the Gas Relay
When the transformer is at normal running, inside of gas relay is full of transformer's oil. If the transformer occurs fault, the gas that is become as transformer's oil is decomposed is collected at the collecting gas cell of gas relay. The air pressure make the oil level reduced, the floating ball is reducing with the oil level and linkage the magnetic switch A or B close. When the gas reached to 170mI, the magnetic switch A is SHUT, connect with signal loop, and send out alarm signal. If other reason (for example: leakage oil) cause the oil level in oil tank reduced, it also will make the signal loop send out alarm signal. When inside of transformer occurs serious fault, it will cause number of gas. When the gas reached to above 260mI, the magnetic switch B SHUT, and the tripping device will operate to cut off the transformer from electrical network, then realize the purpose of protecting the transformer.
Main technical parameter
Manufacture acco to drawings specification condition .
Alarm signal gas capacity:170mL10%
Cutoff(tripping)signal gas capacity):260mL10%
Sealed test pressure:200kPa
Insulated withstand voltage test:2000V
Anti water jet test Protection Class IPX5
Rugged zed abiliy test:frequenecy4-20Hz