What is pcb oil transformer?

PCB oil transformers were commonly used in the electrical industry until the 1970s when they were banned due to environmental concerns. The oil used in these transformers contained polychlorinated biphenyls (PCBs), which are toxic and persist in the environment for a long time.

PCB oil transformers were primarily used in high voltage power transmission and distribution systems, as well as in industrial applications. They were favored for their electrical properties, such as high dielectric strength and thermal stability, as well as their ability to improve energy efficiency.

However, PCB oil transformers have been found to be a major source of PCB contamination in the environment. When PCBs leak from transformers, they can enter the soil, waterways, and air, posing a health risk to humans and wildlife.

Today, the use of PCB oil transformers is strictly regulated, and many countries have implemented programs to remove and dispose of them safely. In addition, alternative transformer fluids, such as mineral oil or synthetic esters, are now available that offer similar performance but are less harmful to the environment.