Technical Analysis: K2E250-RA92-01 ebm-papst
The K2E250-RA92-01 is a robust 250mm radial fan module designed for applications requiring high pressure and airflow in a compact footprint. Powered by a single-phase AC external rotor motor, this unit drives a backward-curved impeller crafted from high-grade reinforced plastic. This material choice not only resists corrosion in humid environments but also dampens vibration, contributing to a smoother operation. The K2E250 is a staple in the industry for roof extraction units, in-line duct fans, and cooling of high-power inverters where air must be forced through dense heatsinks or filters.
Key Technical Characteristics
- Impeller Size: 250 mm.
- Supply Voltage: 230 VAC.
- Motor Type: M2E068-EC.
- Wattage: 115 W – 160 W.
- Protection Class: IP44 (Splash resistant).
- Thermal Protection: Integrated Thermal Overload Protector (TOP).
Field Guide for Engineers
Lifecycle State: Active. Diagnosis: If the fan runs but airflow is low, check for debris on the impeller blades. While backward curved blades are «self-cleaning,» sticky industrial dust can adhere, causing imbalance and bearing noise. If the motor hums, check the starting capacitor (typically 5 µF / 400 VDB). Installation Advice: The mounting position is flexible, but ensure the drainage holes (if present on the specific housing variant) are at the bottom. Compatibility: This fan integrates seamlessly into TIA Portal environments. It can be monitored via a current relay to detect «Belt Break» equivalents (locked rotor or zero load). It supports voltage-based speed control, making it adaptable for variable air volume (VAV) systems managed by Siemens Desigo.
| Feature | Specification |
|---|---|
| Nominal Speed | 2500 RPM |
| Airflow | 1300 – 1450 m³/h |
| Noise Level | 72 dB(A) |
| Current | 0.70 A |
Pro-Tip
The K2E250 series offers an excellent ratio of size to performance. When retrofitting, ensure the inlet cone is reused or replaced with the exact matching part number, as the aerodynamics are tuned to the specific nozzle shape.
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