Why is it critical to monitor thermal conditions in electrical equipment?

Monitoring thermal conditions in electrical equipment is essential primarily to prevent damage from excessive heat. Electrical components, such as transformers, circuit breakers, and motors, are designed to operate within specific temperature ranges. When these components overheat, it can lead to insulation breakdown, reduced efficiency, and ultimately catastrophic failure, which can result in costly repairs and prolonged downtime of electrical systems.

Excessive heat can also raise safety hazards, including the risk of fires or explosions in severe cases. By actively monitoring thermal conditions, operators can implement necessary cooling measures, perform maintenance, and plan for replacements before equipment failures occur.

The other choices are less relevant to the operational integrity and safety of electrical systems, focusing instead on aspects that do not directly contribute to the performance and longevity of the equipment.