Electric heating tube is an electrical component that specially converts electric energy into heat energy. Because of its low price, easy use, easy installation, and no pollution, it is widely used in various electric heating occasions, in order to further help users of electric heating tube to use electric heating tube. , Our factory has done a systematic review of the 16 common sense of electric heating tube, and share it with you:
1. Metal tubular electric heating element
A metal tube is used as a shell, an alloy heating wire is used as a heating element, and a lead rod (wire) is provided at one or two ends, and magnesium oxide insulating medium is filled in the metal tube to fix the heating element of the heating element.
2. Lead the stick
It is connected with the heating element and used for the connection of the component and the power supply, and the metal conductive part used for the connection of the component and the component.
3. Expanded length (L), mm
The sum of the straight and bent lengths of the metal tube on the component pattern.
4. Heating length (t), mm
The length of the part where the heating element is arranged on the element pattern.
5. Heating surface area, cm square
The surface area of the metal tube on the heating length.
6. Surface load, W/cm square
The power per unit area on the heating surface.
7. Fully heating conditions
Make the component reach the working condition of the stipulated working state.
8. Rated voltage, V
Refers to the voltage connected to the component specified in the design and marked on the component housing.
9. Rated power, kW
Refers to the component input power specified in the design and marked on the component housing.
10. Working voltage, V
For a single component connected to the power supply, it refers to the voltage connected to the component specified in the design, that is, the rated voltage; for a group of components connected to the power supply in series, it refers to the specified connection to this group of components during the design The voltage.
11. Working temperature, ℃
The average temperature of the heating surface of the component under the conditions of rated power and full heating.
12. Maximum temperature
The temperature at the highest temperature point on the heating length of the component under the condition of 1.27 times the rated power and full heating.
13. Simulation conditions
Under the state of the various clauses of the standard, measures are taken to make the working temperature of the component basically conform to the working condition of the specified value.
14. Allow repair
Refers to the repair of the component's lead rod damage, metal surface coating damage, insulator and sealing failure, and the performance and normal use of the component will not be affected after the repair.
15.Resume
Due to reasons such as use and long-term storage, the electrical insulation performance of the component is lower than the standard value. The process of restoring the electrical insulation performance to the standard value through oven drying and other methods does not affect the performance and normal use of the component.
16. Damaged
a. The component withstand voltage is lower than the standard value, the leakage current is greater than 5mA or the insulation current is less than 1MΩ, and it is irrecoverable;
b. The shell has flame emission and molten material, the surface is severely corroded or other damages that are not allowed to be repaired;
c. The actual power of the component is 20% worse than the rated power
