The **S4-366-R** is a specific model of a **Step-Up/Step-Down (Buck-Boost) Transformer**, primarily manufactured by brands like **SolaHD** (Emerson). It is designed to adjust voltage levels for electrical equipment to ensure they operate within their rated voltage range. --- ### Technical Specifications Below are the key electrical characteristics of the S4-366-R: | Feature | Specification | | :--- | :--- | | **Primary Voltage** | 120 x 240 Volts | | **Secondary Voltage** | 16 x 32 Volts | | **Power Rating (KVA)** | 0.75 KVA (750 VA) | | **Frequency** | 50/60 Hz | | **Phase** | Single Phase | | **Enclosure Type** | NEMA 3R (Encapsulated, outdoor rated) | | **Temperature Rise** | 115°C | | **Mounting** | Wall mount | --- ### Key Electronic Components & Design #### 1. Encapsulated Windings The core and coils are completely encased (potted) in an epoxy silica compound. This protects the internal electronic parts from: * Moisture and humidity. * Corrosive airborne contaminants. * Physical vibration. #### 2. Dual Voltage Taps (120/240V to 16/32V) The transformer features multiple "taps" or lead wires. By wiring these leads in different configurations (Series vs. Parallel), the output can be toggled: * **Parallel Connection:** Provides 16V output. * **Series Connection:** Provides 32V output. #### 3. Insulation System It utilizes a high-grade insulation system rated for high temperatures. This prevents internal short-circuiting between the primary and secondary coils during continuous heavy loads. --- ### Common Applications The S4-366-R is most commonly used in industrial and commercial settings for the following purposes: * **Voltage Correction:** Boosting 208V up to 230V or 240V for motors and air conditioning units. * **Low Voltage Lighting:** Powering landscape or specialized interior lighting systems requiring 16V or 32V. * **Control Circuits:** Providing power to low-voltage control panels in manufacturing environments. --- ### Wiring Configuration Overview *Always consult the specific wiring diagram on the unit's nameplate before installation.* * **Primary (Input):** Usually labeled H1, H2, H3, H4. * **Secondary (Output):** Usually labeled X1, X2, X3, X4.