The **W2AC-A4CA-R/N** is a specific model of an industrial AC axial fan, typically manufactured by companies like **Wistro** (often used for cooling electric motors). This part is designed for high-performance thermal management in industrial environments. --- ### Technical Specifications The following table outlines the primary electronic and physical characteristics of the unit: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 230V / 400V AC (3-Phase) | | **Frequency** | 50 / 60 Hz | | **Power Consumption** | Approx. 55W - 85W (varies by load) | | **Current Draw** | ~0.15A to 0.25A | | **Speed (RPM)** | ~2800 - 3300 RPM | | **Bearing Type** | Dual Ball Bearing | | **Protection Class** | IP66 (Dust-tight and protected against heavy seas/jets) | | **Connection Type** | Terminal Box or Flying Leads | --- ### Key Electronic Components & Features #### 1. The Induction Motor The heart of the unit is a **3-phase AC external rotor motor**. Unlike standard motors where the shaft spins inside a stationary shell, the "rotor" (the part that spins) is on the outside, attached directly to the fan blades. This provides: * Better heat dissipation. * A more compact footprint. * Higher torque for moving large volumes of air. #### 2. Thermal Protection The "R/N" designation often implies internal thermal protection. These units usually contain a **Thermal Contact (TK)** or a bimetallic switch embedded in the windings. * **Function:** If the motor overheats, the circuit opens to prevent the copper windings from melting or catching fire. #### 3. Capacitor (Model Dependent) While this is a 3-phase unit, it can sometimes be wired for single-phase 230V use using a **Steinmetz circuit**. In such cases, an external "Run Capacitor" is required to shift the phase and initiate rotation. #### 4. Dielectric Strength The electronics are insulated to withstand high-voltage spikes, common in industrial grids where large motors are starting and stopping (inductive flyback). --- ### Wiring Configuration The unit typically utilizes a standard star/delta (Y/Δ) connection scheme found in industrial AC components: ```text 3~ Motor Connection: L1 --- [U1] L2 --- [V1] L3 --- [W1] Bridge [W2-U2-V2] for Star (High Voltage) Bridge [U1-W2][V1-U2][W1-V2] for Delta (Low Voltage) ``` --- ### Common Applications * **Forced Ventilation:** Used on the back of IEC frame motors to provide cooling when the motor is running at low speeds via a VFD. * **Heat Exchangers:** Integrated into industrial cooling towers. * **Control Cabinets:** High-volume air extraction for large electrical suites.