(Summary description)Recommended value of surface load power of electric heating tube (unit power of surface area of tube heating zone)...
Recommended value of surface load power of electric heating tube (unit power of surface area of tube heating zone)
The following surface load generally refers to heating with metal mould and water heating, which can be multiplied by 2-2.5. Air heating is 50% - 60%.
Load value (wcm2)
You should divide the square of the voltage by the resistance, which is 380 * 380 / R
Measure the resistance R with a multimeter (the current is not easy to measure)
If you measure the size, calculate the surface area and divide the power by the surface area to get the power density
Generally, the power density of electric heating rod in China can reach 12W / cm3
Calculation formula for rated power of electric heating element (heating wire, heating plate, etc.)
1. When the working voltage (220 V) is 3 times, the electric heating element must adopt star connection.
2. When the power line voltage is equal to the working voltage (380V) of the electric heating element, the electric heating element must be connected by triangle,
The power calculation formula of common connection mode of each phase electric heating element under symmetrical load is shown in the table, and the common connection mode is shown in the figure.
These connections are widely used in household electrical appliances and industrial and agricultural electrical appliances, which are often encountered in our production and maintenance. In the table, P is the power, u is the power line voltage, R is the resistance of electric heating elements (such as electric furnace wire, infrared heating blood vessel, infrared heating plate, etc.).