The performance requirements of electric heating tubes are in accordance with relevant national standards, and the electric heating tubes have the following requirements:
1. The heating time should be more than 15 minutes for the component to rise from the background temperature to the test temperature under the test voltage;
2. Under sufficient heating conditions, the deviation of the rated power of the component should not exceed the range specified below; For components with a rated power of less than or equal to 100W, it is ± 10%. For components with a rated power greater than 100W, it is+5% to -10% or 10W, whichever is higher. Some companies do their power very accurately, for example: Taizhou Jiayi Single End Electric Heating Tube Factory; In the Yancheng area, some enterprises can achieve a resistance deviation of only 1 Ω from+5% to -5%, such as Annai Electric Heating.
3. Leakage current:
The cold leakage current, as well as the leakage current after water pressure and sealing tests, should not exceed 0.5mA; The thermal leakage current at working temperature should not exceed the calculated value in the formula, but the maximum should not exceed 5mA;
I=1/6 (tT × 0.00001)
I - Thermal leakage current mA
T - Heating length mm
T - Working temperature ℃
When multiple components are connected in series to the power supply, the leakage current test should be conducted on this group of components as a whole.
4. Insulation resistance:
The cold insulation resistance during factory inspection should not be less than 50M Ω; After the sealing test, the insulation resistance after long-term storage or use should not dissipate from M Ω; The thermal insulation resistance at working temperature should not be lower than the calculated value in the formula, but the minimum should not be less than 1M Ω;
R="(10-0.015T)/t" x 0.001
R - Thermal insulation resistance M Ω
T - Heating length mm
T - Working temperature ℃
5. Heat resistance:
The component is promised to undergo 1000 cycles of heat resistance testing under the specified test conditions and test voltage without damage.
6. Insulation withstand voltage strength:
The component should be maintained for 1 minute under the specified trial conditions and trial voltage without flashover or breakdown.
7. Ability to prohibit power on and off:
The component should be able to undergo 2000 on/off attempts under the specified test conditions without damage.
8. Reproduction ability:
The component is promised to undergo 30 cyclic loading attempts without damage under the specified trial conditions and input power.
That's all for the brief introduction of the performance requirements for single headed tubes above, hoping to be helpful to you.
Foshan Feiyue Electric Heating Technology Co., Ltd. was founded in 2004 and is a modern Sino foreign cooperative company specializing in the production of electric heating components. Our company has always been highly praised and trusted by customers for its high-quality single head pipes and excellent after-sales service. With the continuous development of our business, our products have been sold nationwide and even overseas.