Öljyeristeisiä

Öljyeristeisiä, which translates to "oil-insulated" in English, refers to electrical equipment that utilizes oil as an insulating medium. This type of insulation is commonly found in power transformers, high-voltage circuit breakers, and certain types of capacitors. The oil used is typically mineral oil, but synthetic dielectric oils are also employed for specific applications.

The primary function of the oil is to provide electrical insulation between live components and grounded parts, preventing arcing and short circuits. It also serves as a coolant, absorbing and dissipating the heat generated by the equipment during operation. This cooling function is crucial for preventing overheating and ensuring the longevity of the components. The dielectric properties of the oil are critical, and its quality must be maintained through regular testing and filtration to remove impurities like moisture and solid particles, which can degrade its insulating capabilities.

Oil-insulated equipment offers several advantages, including excellent dielectric strength, good heat dissipation, and a relatively low cost compared to some other insulation methods. However, it also presents challenges, such as the risk of oil leaks and the flammability of the oil, which requires careful design and safety measures. The maintenance of oil-insulated equipment is a significant aspect of electrical system upkeep, involving regular inspections, oil sampling, and analysis.