The **HAS-30-R/Q** is a high-precision Current Transducer manufactured by **LEM**. It is designed for the electronic measurement of DC, AC, and pulsed currents with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic interface). --- ### 1. Key Technical Specifications The following table outlines the core electronic parameters for the HAS-30-R/Q: | Parameter | Specification | | :--- | :--- | | **Primary Nominal Current ($I_{pn}$)** | 30 A | | **Measuring Range ($I_{pm}$)** | ± 90 A | | **Secondary Output Voltage ($V_{out}$)** | ± 4 V (at $I_{pn}$) | | **Supply Voltage ($V_c$)** | ± 15 V (± 5%) | | **Accuracy** | ± 1% of $I_{pn}$ | | **Linearity** | < ± 1% | | **Frequency Bandwidth** | DC ... 50 kHz | | **Response Time** | < 3 µs | --- ### 2. Operating Principle: Hall Effect The HAS-30-R/Q operates based on the **Open Loop Hall Effect** principle. 1. **Magnetic Flux:** When a primary current flows through the device's center hole, it creates a magnetic flux. 2. **Hall Sensor:** A Hall effect generator located in the air gap of the magnetic circuit produces a voltage proportional to this flux. 3. **Signal Conditioning:** Internal electronics amplify this small Hall voltage to provide a usable output (typically 4V for the rated 30A current). --- ### 3. Physical & Electronic Interface The device is designed for PCB mounting and features the following pinout configuration: * **Pin +15V:** Positive power supply. * **Pin -15V:** Negative power supply. * **Pin Output:** Voltage signal proportional to the primary current. * **Pin 0V:** Ground/Common reference. --- ### 4. Advantages & Applications #### Advantages * **Galvanic Isolation:** High safety as the measuring circuit is physically separated from the high-voltage primary. * **Low Power Consumption:** Efficient monitoring without significant energy loss. * **Wide Aperture:** Allows for easy cable or busbar routing. #### Common Applications * **Variable Speed Drives:** Monitoring motor current. * **UPS Systems:** Uninterruptible Power Supply battery management. * **Welding Equipment:** Precise control of output current. * **Renewable Energy:** Current monitoring in solar inverters.