The **W2TS-0B2-R2/Q** is a high-precision, industrial-grade current sensor (transducer) typically used for monitoring DC and AC currents in power electronics, battery management systems, and solar inverters. --- ### 1. Component Overview This part belongs to the category of **Closed-Loop Hall Effect Current Transducers**. It is designed to provide a highly accurate measurement of electrical current while maintaining galvanic isolation between the primary high-power circuit and the secondary control circuit. ### 2. Technical Specifications The following table outlines the typical electrical characteristics of this series: | Parameter | Specification | | :--- | :--- | | **Primary Nominal Current ($I_{pn}$)** | 200A (Typical for this series) | | **Measuring Range** | Up to $\pm$ 300A - 400A | | **Supply Voltage ($V_c$)** | $\pm$ 12V to $\pm$ 15V DC | | **Secondary Output** | Current Output (e.g., 100mA) | | **Accuracy** | $\pm$ 0.5% at rated current | | **Linearity** | < 0.1% | | **Isolation Voltage** | 3kV - 6kV AC (50Hz, 1 min) | --- ### 3. Key Features & Internal Mechanisms 1. **Closed-Loop (Zero Flux) Technology**: * The sensor uses a compensation method. A magnetic field generated by the primary current is cancelled out by an opposing magnetic field created by a secondary coil. * This results in **extremely low offset drift** and high linearity compared to open-loop sensors. 2. **Galvanic Isolation**: * There is no physical electrical connection between the high-voltage busbar and the output pins, protecting sensitive microcontrollers or PLCs. 3. **High Dynamic Performance**: * It features a very fast response time (typically $< 1\mu s$), making it suitable for short-circuit protection and high-speed switching applications. --- ### 4. Pinout and Integration While specific physical footprints vary by manufacturer (often associated with brands like **LEM** or generic industrial equivalents), the standard integration involves: * **Busbar / Aperture**: The primary wire passes through the center hole. * **Terminal (+) / (-)**: Dual power supply pins (e.g., +15V and -15V). * **Terminal (M)**: Measuring/Output pin. * **Terminal (0V)**: Ground reference. --- ### 5. Common Applications * **Variable Speed Drives (VSD):** Monitoring motor phase currents. * **UPS Systems:** Managing battery charging and inverter output. * **Solar Inverters:** Monitoring DC string currents. * **Welding Equipment:** Precise control of output current.