Why The Tubular Heater Does Not Heat Up
1. Internal factors
Because the magnesium oxide powder in the tubular heater absorbs moisture, and the port of the heating tube is not completely sealed, it will be placed in the humid air for a long time, and the moisture will enter the tubular heater. At this time, the magnesia powder, which plays a role of heat conduction, becomes moist, so the tubular heater does not generate heat.
Situation analysis:
1. Measure whether there is resistance value. If there is no resistance value, it is destroyed.
b. If there is a resistance value, check if there is any leakage. Use a megger (insulation resistance meter) to measure the insulation resistance value. (The larger the insulation resistance value, the better the insulation.) If the insulation resistance value is relatively small, it means that the magnesium oxide powder in the heating tube may be damp, thereby weakening the insulation of the heating tube.
Solution
1. Put the tubular heater into an oven for drying, and dehumidify the magnesium oxide powder.
2. Use low voltage to power the tubular heater for a period of time, and the tubular heater also has the function of dehumidification.
Second, external factors
The wiring problem is an important factor that causes the tubular heater to not generate heat.
E.g:
1. The single voltage of the tubular heater is 380 volts, connected to 220 volts. At this time, the rated power will definitely be reduced. When it is small enough, there may be a phenomenon that the tubular heater does not generate heat at this time.
2. The voltage and power supply of the tubular heater are correct, but the wiring method is wrong. This is also the reason why the tubular heater does not generate heat.
