Technical Specification
- Entire motor series made of cast iron
- Efficiency classes IE3 and IE non-classified
- Enclosure IP55, insulation class 180 (H)
- Suitable for use with frequency converters
- Bearings designed for high ambient temperatures
- Standard re-lubrication equipment, Viton® shaft seal
- External and internal surface treatment according to IEC 712-2-1, corrosion class C3, 110 μm, using a worldwide special method
- Condensation holes positioned according to B3/V6 and sealed with rivets
- Motors have no internal fan
- 3 x PTC thermistors
Bearings
Bearings are a crucial factor affecting motor lifespan.
Proper lubrication and use of heat-resistant greases help the motor operate for long periods without unexpected downtime. Although grease technology continues to evolve, maintaining sufficient lubrication remains essential for motor maintenance.
The temperature difference between the bearings at the D and N ends of the motor can exceed 20°C, which significantly affects grease lifespan.
Temperature Monitoring and Lubrication
Temperature monitoring can be done per motor or fan group by installing PT100 sensors in the bearings and windings. This provides accurate temperature data to support lubrication planning.
It is important to note that special greases are usually not compatible with each other.
Vibration Monitoring
Even if motor bearings are properly lubricated, it is also important to monitor vibrations in the fan units. An unbalanced blade can quickly damage bearings and even affect other motors in the same fan group.
Vibration monitoring is possible, for example, using SPM measurement nipples.
Securing Adequate Cooling
PAfter 3–4 years of use, a thick layer of dirt—such as resin—may accumulate on the motor surface, preventing proper cooling. This causes additional heat stress, affecting windings and bearings, and shortens motor lifespan.
During maintenance, it is recommended to inspect motors and clean cooling fins thoroughly if needed.
