Solution
Solutions for global temperature control systems
Fan
subcategory： Solution
2024-09-12
1. application background
Different fans are often used in different industries, generally external rotor fans, centrifugal fans and so on. For example, it is used in high-speed tunnels, factory floors, automobiles, 5G communication base stations, etc. Different application environments have different effects on the fan, and the working conditions required for the fan are also different; when the ambient temperature is too high, or the fan runs abnormally, it is easy to burn the motor and cause fire hazards. If the fan built-in thermal protector can effectively avoid similar situations and ensure safety.
2. protection principle
When the fan is running abnormally overheated or the ambient temperature is too high, when the temperature felt by the protector reaches the rated operating temperature, the bimetallic sheet of the protector will deform and separate from the contact to form an open circuit and actively cut off the power supply. If the protector is in the control loop, it will transmit a signal to the motor control board to cut off the power supply. When the temperature returns to the normal state, the protector is reset and the fan works normally.
3. installation position
Embedded in the coil, connected to the main circuit, so that the temperature is more accurate and sensitive, can be directly cut off the power supply.
· Stick the protector on the surface of the coil, and then wrap and fix it with insulating tape.
4. selection
Volume: for the convenience of embedded in the coil inside, can choose round KSD button series. If attached to the surface of the coil, you can choose 17AM,TB series, etc.
Current: according to the fan stall and rated current size, choose KSD-B(5A) or KSD-D(10A).
Temperature: generally 130 ℃, 150 ℃, 155 ℃, etc., and also 180 ℃; Most of the insulation grades are F grade, and those with higher requirements will have H grade.
Contact switch form: generally normally open or normally closed, and there is also a manual reset type, which can be reset only after power failure and troubleshooting to ensure safe operation of maintenance personnel.
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