How is hermetically sealed transformer oil sampling conducted in power transformers?

Hermetically sealed transformer oil sampling in power transformers is conducted by using a specialized sampling device that maintains the integrity of the oil. The device is connected to the transformer’s sampling valve, ensuring no air enters the system. The oil is drawn into a clean, pre-prepared container, which is then sealed immediately to prevent contamination. This method ensures accurate analysis of the transformer oil’s properties and condition without exposure to atmospheric moisture or air.