In transformers, PCBs stand for Polychlorinated Biphenyls. These are synthetic chemicals that were historically used in electrical equipment like transformers.
The Role of PCBs in Transformers
As indicated by the provided reference, PCBs were used in transformers primarily for two key functions:
- Coolants: They helped manage the heat generated during transformer operation.
- Lubricants: They provided lubrication for internal components.
Why Were PCBs Used?
PCBs were favored for these applications because they possess properties highly desirable in electrical equipment:
- They don't burn easily, offering a significant advantage in terms of fire safety compared to some other potential fluids.
- They are good insulators, which is crucial in high-voltage electrical systems to prevent unintended current flow.
Although once widely used for these beneficial properties, PCBs are no longer produced in the United States due to environmental and health concerns, but they can still be found in older equipment and the environment.
