What is an oil-filled current transformer?

An oil-filled current transformer is an electrical device that measures alternating current (AC) and is housed in a container filled with insulating oil. The oil serves not only as an electrical insulator but also provides cooling and facilitates heat dissipation. Typically, these transformers utilize a magnetic core surrounded by the oil, enabling accurate current measurement while reducing the risk of electrical breakdown. The insulating properties of the oil ensure that the transformer operates efficiently in high-voltage environments and enhances its lifespan. Regular cleaning and maintenance of the oil are crucial to prevent contamination, thereby ensuring optimal performance in applications such as power substations and industrial settings.