The production process of a single head involves more craftsmanship than ordinary ones.

The production process of a single head involves more craftsmanship than ordinary ones.

1. Single head electric heating tube appearance: A single head electric heating tube has one end (one end) for output, while a regular electric heating tube has two ends for output.

2. Internal structure of single head electric heating tube: The winding method of single head electric heating tube is different from that of ordinary electric heating tube, especially the current imported single head electric heating tube, which is very different from ordinary electric heating tube.

3. Single head electric heating tube production process: There are more processes involved in the production of single head electric heating tubes than ordinary heating tubes. For example, heating tubes such as shrink tubes ensure that single head electric heating tubes have higher power and longer usage time than ordinary electric heating tubes.

1. Heating time

At the test voltage, the time for the component to rise from ambient temperature to test temperature should not exceed 15 minutes

2 Rated power deviation

Under sufficient heating conditions, the deviation of the rated power of a single head electric heating tube should not exceed the range specified below;

The single head electric heating tube is ± 10% for components with a rated power of less than or equal to 100W.

For components with a rated power greater than 100 heating tubes W, it is+5% to -10% or 10W, whichever is higher.

3 leakage current</DIV>

The cold leakage current, as well as the leakage current after water pressure and sealing tests, should not exceed 0.5mA

The exposed current of the thermal discharge heating tube at working temperature should not exceed the calculated value in the formula, but 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 of the heating tube stored for a long time or used 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 should not be less than 1M Ω

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