What are the reasons for the short circuit of the electric heating tube in a single head mold

What are the reasons for the short circuit of the electric heating tube in a single head mold

Single head mold electric heating tubes are widely used in the process of mold electric heating tubes and other industrial electric heating equipment. However, low-quality unmodified magnesium oxide powder can absorb moisture from the air, causing short circuits in the electric heating tubes. However, the phenomenon of short circuits in the two leads of single head mold heating tubes is not always caused by this reason. The reasons for short circuits in electric heating tubes are as follows:

1. Using iron chromium aluminum as the lead out wire with excessive electrical resistivity to increase the temperature of the lead out wire resulted in accidents, and exposed to air, the position of the heating zone has shifted towards the lead out wire port.

2. The rated voltage of two outgoing lines causes a short circuit and excessively high temperature.

3. Defects in the module drilling process, such as the horn shaped opening of the mold hole, affect thermal conductivity, thereby affecting thermal conductivity and air breakdown.

4. There is powder looseness at the end of the outlet pipe, and the distance between the two holes passing through the outlet pipe is too close.

5. The distance between the low-quality sealing silicone and the screw at the root of the lead wire is too close.

Damage to electric heating tubes

The withstand voltage of the component is lower than the standard value, the leakage current is greater than 5mA, or the insulation current is less than 1M Ω, and it cannot be restored.

The shell has flame emission and molten material, severe surface corrosion, or other damage that cannot be repaired.

The actual power of the component exceeds the rated power by 20%.

Electric heating tubes are electrical components that specifically convert electrical energy into thermal energy. Due to their low cost, convenient use, easy installation, and pollution-free nature, they are widely used in various electric heating applications.

Recovery of electric heating tubes

Due to usage and long-term storage reasons. The electrical insulation performance of a component is lower than the standard value. The process of restoring its electrical insulation performance to the standard value through methods such as oven drying, without affecting the performance and normal use of the component.

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