What is pcb oil in transformers?

PCB (Polychlorinated Biphenyl) oil was used as a coolant and insulating fluid in transformers until the 1970s. It was banned in many countries due to its harmful effects on human health and the environment.

PCB oil is toxic and can cause serious health problems such as cancer, immune system disorders, and neurological damage. It is also harmful to the environment as it can contaminate soil, water, and air.

Transformers that still contain PCB oil pose a significant risk to human health and the environment, especially during maintenance and disposal. Special precautions must be taken during handling, transport, and disposal of PCB-contaminated materials.

The use of PCB oil in transformers has been replaced by non-toxic fluids such as mineral oil, silicone oil, and ester-based fluids, which are safer for both human health and the environment.