Pressure Relief Device In Transformer

The pressure relief device limits the tank overpressure and reduces the risk of tank rupture and uncontrolled oil spill which might also cause a fire.

Pressure relief device in transformer.

A flashover or short circuit in a liquid filled transformer is usually accompanied by overpressure in the tank due to gas being formed by the decomposition and evaporation of the oil. An internal fault in an oil filled transformer is usually accompanied by overpressure in the transformer tank. The prd allows rapid release of excessive pressure that may be generated in the event of a serious fault. The surge of oil caused by a heavy internal fault bursts the disk and allows the oil to discharge rapidly.

Pressure relief device for power transformers. Prd pressure relief device is a device which is used for avoiding high oil pressure builds up inside the transformer during fault conditions. Qualitrol 201 202 205 small pressure relief device. Sudden and violent short circuits inside the oil cooled transformer s metal tanks instantly generate an enormous amount of gas which causes a substantial increase in internal pressure.

If the pressure cannot be externally discharged there is a danger that the transformer could explode and potentially cause harm and damage. The simplest form of pressure relief device is the widely used frangible disk.