Övertemperaturreläer

Övertemperaturreläer, also known as thermal cut-off relays or thermal overload relays, are safety devices designed to protect electrical equipment from damage caused by excessive heat. They function by monitoring the temperature of a component and interrupting the electrical circuit when a predetermined temperature threshold is reached. This prevents overheating that could lead to insulation failure, fire, or destruction of the equipment.

These relays typically contain a bimetallic strip or a similar temperature-sensitive element. When the temperature rises, the bimetallic strip bends or deforms, activating a switch that opens the circuit. Once the temperature drops below a certain reset point, the bimetallic strip returns to its original position, allowing the circuit to be re-established, either automatically or manually depending on the relay's design.

Övertemperaturreläer are commonly found in a wide range of applications, including electric motors, transformers, heating elements, power supplies, and domestic appliances such as ovens and hair dryers. Their primary purpose is to ensure the safe and reliable operation of electrical systems by mitigating the risks associated with thermal runaway. They are a crucial component in preventing catastrophic failures and extending the lifespan of electrical devices.