PCBs, or polychlorinated biphenyls, were primarily used as coolants and lubricants in electrical equipment.
Historical Uses of PCBs
PCBs were valued for specific properties that made them useful in various industrial applications:
- Coolants: They effectively dissipated heat generated in transformers and other electrical devices.
- Lubricants: Their lubricating properties helped in the smooth operation of mechanical parts within electrical equipment.
- Electrical Insulation: PCBs are excellent insulators, preventing electrical shorts and ensuring the safe operation of devices.
Specific Equipment Using PCBs:
The reference notes that PCBs were primarily used in:
- Transformers
- Capacitors
- Other electrical equipment
Why PCBs are No Longer Used
The manufacturing of PCBs in the U.S. was halted in 1977 due to significant environmental and health concerns.
- Environmental Accumulation: PCBs persist in the environment, building up in soil, water, and living organisms.
- Harmful Health Effects: Exposure to PCBs has been linked to various adverse health effects.
| Property | Use | Reason |
|---|---|---|
| High heat capacity | Coolant in transformers | Excellent for dissipating heat |
| Low flammability | Lubricant in electrical equipment | Reduced fire risk in equipment |
| High insulation | Insulators in capacitors and other devices | Prevented shorts and electrical issues |
