Common reasons for explosion-proof motors

Update:24 May 2022
Summary:In the actual application of explosion-proof motors, many factors can lead to motor failures. This article lists five co...
In the actual application of explosion-proof motors, many factors can lead to motor failures. This article lists five common reasons. Let's take a look at which five?
1. Overheating
Overheating is the biggest culprit of explosion-proof motor failure. In fact, the other four reasons listed in this article are on the list in part because they generate heat. Theoretically, the life of the winding insulation is halved for every 10°C increase in heat. Therefore, ensuring that explosion-proof motors run at the right temperature is the best way to extend their life.
2. Dust and pollution
All kinds of suspended particles in the air will enter the explosion-proof motor and cause various hazards. Corrosive particles can wear components, and conductive particles can interfere with component current flow. Once the particles block the cooling channels, they will accelerate overheating. Obviously, choosing the correct IP protection level can alleviate this problem to a certain extent.
3. Power supply problem
Harmonic currents caused by high frequency switching and pulse width modulation can cause voltage and current distortion, overload and overheating. This shortens the life of motors and components and increases long-term equipment costs. In addition, the surge itself can cause the voltage to be too high and too low. To solve this problem, the power supply must be continuously monitored and checked.
4. Damp
Moisture itself can erode explosion-proof motor components. When moisture and particulate pollutants in the air are mixed, it is fatal to the motor and further shortens the life of the pump.
5. Improper lubrication
Lubrication is a degree issue. Excessive or insufficient lubrication can be harmful. Also, pay attention to contamination in the lubricant and whether the lubricant used is suitable.
These problems are all interrelated, and it is difficult to solve one of them in isolation. At the same time, these problems also have one thing in common: if explosion-proof motors are used and maintained correctly, and the environment is properly managed, these problems can be prevented.