What are PCBs in transformer oil?

PCBs in transformer oil refer to polychlorinated biphenyls, a group of synthetic organic chemicals known for their insulating and heat-transfer properties, historically used in electrical equipment like transformers. These compounds are highly effective for electrical insulation and cooling, but their environmental persistence and toxicity have led to significant regulatory restrictions. The presence of PCBs in transformer oil can pose serious health and ecological risks, prompting the need for monitoring, management, and appropriate disposal methods when transformer maintenance or decommissioning occurs. Understanding the implications of PCBs in transformer oil is crucial for ensuring compliance with environmental standards and for the safe operation of electrical equipment.