The part number **W2DNY-241Y-R2/CE** typically refers to a high-performance **External Rotor Axial Fan** or motor assembly, often manufactured by companies like **EBM-Papst** or similar industrial ventilation specialists. These components are designed for heavy-duty cooling in industrial cabinets, telecommunications, and HVAC systems. ### 1. Technical Specifications Overview Below is a breakdown of the typical electronic and mechanical characteristics for this series: | Parameter | Specification (Typical) | | :--- | :--- | | **Motor Type** | 3-Phase AC External Rotor Motor | | **Nominal Voltage** | 230/400 V AC (Delta/Star connection) | | **Frequency** | 50 / 60 Hz | | **Power Input** | ~50W to 80W (model dependent) | | **Speed (RPM)** | 2600 - 2900 RPM | | **Insulation Class** | Class F or B | | **Protection Class** | IP44 / IP54 (Dust & Splash Water Protection) | | **Bearings** | Maintenance-free Ball Bearings | --- ### 2. Key Electronic Features #### A. External Rotor Design Unlike a standard motor where the rotor turns inside a stationary stator, the **External Rotor** design has the stationary part (stator) in the middle, and the rotating part (rotor/housing) on the outside. * **Benefit:** Compact design and excellent heat dissipation, as the fan blades are attached directly to the rotor. #### B. 3-Phase AC Operation This part is designed for industrial grids. It can be wired in two primary configurations: 1. **Delta ($\Delta$) Connection:** Used for lower voltage (e.g., 230V 3-phase). 2. **Star (Y) Connection:** Used for higher voltage (e.g., 400V 3-phase). #### C. Integrated Thermal Protection Most "/CE" variants include an internal **Thermal Overload Protector (TOP)** wired into the motor windings. This shuts down the power if the internal temperature exceeds safety limits to prevent coil burnout. --- ### 3. Connection Diagram Example *Note: Always refer to the label on the specific unit before wiring.* ```text L1 (Brown) ----| L2 (Blue) ----|--> To 3-Phase Supply L3 (Black) ----| PE (Green/Y)----|--> Ground ``` --- ### 4. Meaning of the Suffixes * **W2D:** Indicates a 3-phase axial fan series. * **241:** Usually refers to the diameter size or specific impeller geometry. * **/CE:** Indicates compliance with European safety, health, and environmental protection standards (Conformité Européenne).