What are the technical considerations for what is pcb oil for transformer?

PCB oil, or polychlorinated biphenyl oil, was historically used as a dielectric fluid in transformers due to its excellent insulating properties. However, technical considerations include its environmental and health hazards, as PCBs are toxic and persistent in the environment. Regulations now prohibit its use, necessitating the transition to safer alternatives like mineral oil or ester-based fluids. Proper disposal and remediation of PCB-contaminated equipment are also critical to ensure compliance with environmental standards.