In HVAC systems, what is often used as a measure of safety in high current applications?

In HVAC systems, circuit breakers are crucial for ensuring safety in high current applications. They serve as a protective mechanism that automatically interrupts the electrical flow in the event of an overload or short circuit. This interruption helps prevent damage to the system by avoiding potential overheating of wires and components, which can lead to fires or equipment failure.

Circuit breakers can be reset after they trip, allowing for easier maintenance and operation compared to other devices. Their design enables them to handle the high current loads typical in HVAC systems and provide instant protection, making them an essential safety measure in high current scenarios. While fuses also provide protection by breaking the circuit when current exceeds safe levels, they must be replaced after use, which can be less convenient than resetting a circuit breaker. Thermal relays and contactors play different roles in the operation and control of HVAC systems. Thermal relays monitor temperature and can provide overload protection, while contactors are used to control electrical power.