Tubular heater performance requirements

Jan 19, 2018

Roots by the relevant national standards, electric heating pipe has the following requirements:

1 warming time

In the test voltage, the temperature rise time from the ambient temperature to the test temperature should not exceed 15min

2 Rated power deviation

Under the conditions of sufficient heat, the deviation of the rated power of the components should not exceed the following specified range;

For components rated at less than or equal to 100W: ± 10%.

For components rated at> 100W, + 5% ~ -10% or 10W, whichever is greater.

Some enterprises do very accurate power, for example: Taizhou Jiayi single-ended electric pipe plant;

Yancheng area here, some companies can do +5% ~ -5%, the resistance deviation of only 1Ω, such as the heat resistance.

3 Leakage current </ DIV>

Cold state leakage current and leakage test after water pressure and seal test should not exceed 0.5mA

Thermal leakage current at operating temperature should not exceed the calculated value in the formula, but the maximum does not exceed 5mA

I = 1/6 (tT × 0.00001)

I - thermal leakage current mA

t-fever length mm

T-working temperature ℃

When multiple components are connected in series to a power source, the leakage current test shall be performed on the whole set of components.

4 insulation resistance

Factory inspection cold insulation resistance should not be less than 50MΩ

After the seal test, long-term storage or use of insulation resistance should not be with MΩ

Thermal insulation resistance at operating temperature should not be less than the value calculated in the formula, but the minimum should not be less than 1MΩ

R = "(10-0.015T) / t" × 0.001

R-thermal insulation resistance MΩ

t-fever length mm

T-working temperature ℃

5 dielectric strength

Components should be kept under specified test conditions and test voltage for 1min without flashover and breakdown

6 through the ability to power off

Components should be able to experience 2,000 times the power test under the specified test conditions, without damage

7 overload capacity

Components under specified test conditions and input power should withstand 30 cycles overload test, without damage

8 heat resistance

Components shall withstand 1000 cycles of heat resistance test under specified test conditions and test voltage without damage

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