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Working principle of temperature switch for rolling shutter door motor | Haichaun

Temperature switch is very necessary for the safety and stability of the rolling shutter door. The HCET-A temperature switch is a protective device used to monitor the temperature of electrical equipment that can automatically disconnect the equipment when overheated or overloaded and prevent equipment damage.


August 10, 2023

The motor installed on the rolling shutter door is easy to use and simple to install. Compared with the traditional manual opening method, it has the advantages of convenient, safe and reliable, space saving, high degree of automation and simple maintenance.


Rolling shutter door motor has the advantages of convenience, speed, safety and reliability, space saving, high degree of automation and simple maintenance, so it is widely used in many fields such as commercial, industrial, home and public places.

thermal protector

Temperature control switch is very necessary for the safety and stability of the rolling shutter door. The HCET-A series thermostat is a protective device used to monitor the temperature of electrical equipment that can automatically disconnect the equipment when overheated or overloaded and prevent equipment damage.


  1. 1. Avoid overheating of the motor: when using the shutter door, the motor may cause overheating due to long operation or high ambient temperature, which then lead to motor damage or even fire and other accidents. Adding the temperature switch can effectively avoid the motor overheating problem.


2. Prevent the motor overload: in addition, when the rolling shutter door meets the resistance or the load is too large, the motor may be overloaded and work, affecting the life of the equipment. The HCET-A series thermal protector can timely detect and disconnect the power supply to prevent the motor overload, so as to protect the stable operation of the equipment.


3. Improve safety: the temperature switch can be cut off in time when the equipment is abnormal, to avoid personnel injury or property loss caused by poor operation of the equipment.


The overheating of the shutter motor may be as follows:


1. Overload operation: if the rolling shutter motor is too heavy, runs continuously or starts frequently, it will lead to the heat increase of the motor through the circuit, thus causing overheating failure.


2. High speed: when the speed of the rolling shutter motor is too high, it will increase the heating area of the motor, and then affect the heat dissipation of the motor. Especially in the motor high speed but at the same time under a large load, it is easier to lead the generator overheating failure.


3. Aging of coil insulation: after the rolling shutter motor lasts for a long time, the coil insulation ages and the impedance decreases, which will lead to the increase of circuit current and motor overheating.


4. Motor damage: the service life of the rolling shutter door motor is long, the internal parts such as bearings, gears, etc., the friction will overheating the motor after wear, and eventually lead to motor failure.


5. Ambient temperature is too high: when the rolling shutter motor is installed where the ambient temperature is too high, the temperature around the motor will be very high, causing difficult heat dissipation inside the motor, thus leading to overheating failure of the motor.


Therefore, the HCET-A series temperature switch is very necessary for the application scenarios and needs of the electric doors such as the rolling shutter door.


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