An engine that has been sitting in a warehouse for months or years cannot simply be plugged into the network. During storage, the winding could become moist and the lubricant could thicken. Let's look at how to properly carry out re-preservation of the engine.
What happens during storage
- The winding absorbs moisture from the air - the insulation resistance drops.
- The lubricant in the bearings ages and thickens.
- Corrosion appears on unpainted parts.
- The shaft may become acidified.
Procedure depreservation
- External inspection, removal of conservation grease.
- Checking the free rotation of the shaft manually.
- Measuring the insulation resistance with a megger.
- If the insulation is low - drying the windings.
- Checking and, if necessary, replacing the lubricant bearings.
- Test run at idle with control.
The key point is insulation
| Insulation resistance | Action |
|---|---|
| OK | Can start |
| Reduced | Drying before starting |
| Close to zero | Diagnostics, rewinding possible |
Starting a motor with a wet winding without drying can lead to breakdown and rewind. Therefore, insulation measurements are required. A complete check is provided by diagnostics.
Do you need to put the engine into operation after a long period of storage in Tashkent? Elektromotors engineers will check and prepare it for launch - contact us.