Нагревательный элемент теплового реле перегрузки Caterpillar 4418887

The Thermal Overload Relay Heater is a component within an overload relay system that safeguards electric motors from damage due to prolonged overcurrent conditions. It operates by converting electrical current into heat, which causes a bimetallic strip to actuate the relay trip mechanism when temperatures exceed a calibrated threshold. These heaters are rated for specific current ranges and are selected based on motor load characteristics. They are mounted inside the relay housing and respond to thermal buildup caused by excess current, enabling timely disconnection of the motor circuit.Attributes:• Prevents motor winding damage from overheating.• Ensures safe motor restart after thermal cooling.• Low thermal mass for accurate trip timing.Applications: The Thermal Overload Relay Heater monitors current-induced heat and triggers relay disconnection to protect motors from damage due to continuous overcurrent exposure.