What is the working principle of the three-phase thermal protector
Aug 04, 2022|
View:207Three-phase thermal protectorIt is a motor protector with dual protection functions of current overload protection and overheat protection. The rated power supply voltage is usually 220V and 380V, the supported power is 0.55KW-75KW, and the operating temperature range is 40 degrees-150 degrees. The three-phase thermal protector has the function of protecting the electronic circuits such as motor overload, phase loss, and stall, and it can be used in three-phase motors with any form of wiring method.
Three-phase thermal protectorThe working principle is that when the motor winding coil current overload exceeds the motor current rating multiple, or the motor winding coil overheats and the temperature exceeds the motor limit temperature, the three-phase thermal protector can automatically disconnect the power circuit at the rated current value, thereby achieving the purpose of protecting the motor safety. The three-phase thermal protector is energy-saving, sensitive, economical, and can be used in highly polluted environments.
The overheat protection device of the three-phase thermal protector is usually a thermal relay. The thermal element of the thermal relay is installed in the coil of the three-phase asynchronous motor. When the coil is overheated, the thermal relay will open the contact and connect the contact in series to the circuit of the contactor coil; when the motor is overloaded, the coil overheats, the thermal relay will open the contact, the contactor coil will be de-energized, and the motor will be disconnected from the power supply.
Changzhou Ainuo Electronic Technology Co., Ltd. isThree-phase thermal protectorAs a manufacturer, we have many years of experience in producing three-phase thermal protectors. The three-phase thermal protectors we produce are not only of good quality but also relatively cheap compared to our peers. If you need three-phase thermal protectors, please feel free to consult us!
