pressure relief valve

1. Installation position
   The pressure relief valve is usually installed on the top or upper part of the transformer oil tank, directly connected to it.

2. Working principle

• During transformer operation, if an internal fault occurs (such as a short circuit, arc, or insulation breakdown), a large amount of gas and pressure will be generated in a very short time.

• The internal pressure of the oil tank rises rapidly. When it exceeds the design limit, the pressure relief valve automatically opens to quickly release the excess pressure.

• Once the pressure drops back to a safe range, the valve closes automatically, maintaining the tank’s sealing.

3. Tank protection

• Without a pressure relief valve, the oil tank may deform, crack, or even explode due to excessive internal pressure.

• The pressure relief valve prevents tank damage, ensuring the safety of the transformer and surrounding equipment.

4. Cooperation

• The oil tank is the main container that holds transformer oil and the internal windings.

• The pressure relief valve is a key safety accessory of the tank. Together, they ensure safe and reliable transformer operation.

In summary, the pressure relief valve is the “safety valve” of the oil tank. Once the internal pressure rises abnormally, it releases pressure in time to prevent rupture of the oil tank.