The **W2AC-A11B-R/Q** is a specific technical configuration for an industrial-grade **AC Axial Fan**, typically manufactured by brands like **WISTRO** or similar specialized cooling solution providers. These fans are commonly used in heavy-duty applications such as motor cooling (forced ventilation) or industrial enclosures. --- ### 1. Technical Specifications Table | Feature | Specification Details | | :--- | :--- | | **Model Type** | External Rotor Motor Axial Fan | | **Voltage Range** | 230V AC (Standard Single Phase) | | **Frequency** | 50 / 60 Hz | | **Power Connection** | Terminal Box or Lead Wires (Model dependent) | | **Bearing Type** | High-precision Ball Bearings | | **Protection Class** | IP44 or IP54 (Dust/Splash resistant) | | **Material** | Die-cast aluminum housing / Steel or Plastic blades | --- ### 2. Breakdown of the Part Number Components While specific manufacturer coding can vary slightly, the alphanumeric string generally breaks down as follows: * **W2AC:** Indicates the series (often "W" for Wistro, "2" for number of poles, and "AC" for Alternating Current). * **A11B:** Refers to the physical frame size and motor stack height. "A" usually denotes the aerodynamic design, and "11" relates to the motor diameter or power rating. * **R/Q:** * **R:** Often signifies **Rotational direction** or "Reverse" flow. * **Q:** Usually indicates a **Quick-connect** terminal or a specific "Quiet" operation certification. --- ### 3. Electronic & Mechanical Features #### A. The External Rotor Motor Unlike standard motors where the rotor is inside the stator, this fan uses an **external rotor**. The fan blades are attached directly to the outer housing of the motor. * **Benefit:** Compact design and better heat dissipation for the motor itself. #### B. Capacitor Requirement As a single-phase AC motor, this unit typically requires a **Running Capacitor** to create a phase shift for the starting torque. * *Note:* Using the wrong capacitance value can lead to motor overheating or failure to start. #### C. Thermal Protection Most variants in this series include an internal **Thermal Overload Protector (TOP)**. If the motor reaches a critical temperature, the circuit opens to prevent the windings from burning out. --- ### 4. Common Applications 1. **Forced Ventilation:** Attached to the back of electric motors to provide cooling when the motor is running at low speeds via a VFD. 2. **Heat Exchangers:** Used in industrial chillers and condensers. 3. **Control Cabinets:** High-volume air extraction for server rooms or CNC control units.