The **HAS-06-R** is a high-performance **Open-Loop Hall Effect Current Transducer** manufactured by LEM. It is designed to measure DC, AC, and pulsed currents with galvanic isolation between the primary (high power) circuit and the secondary (measurement) circuit. --- ### ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Primary Nominal Current ($I_{pn}$)** | 6 A | | **Measuring Range** | 0 to ±18 A | | **Output Voltage (at $I_{pn}$)** | 4 V | | **Supply Voltage ($V_c$)** | ±15 V (±5%) | | **Accuracy** | ±1% of $I_{pn}$ | | **Linearity** | < ±1% of $I_{pn}$ | | **Frequency Bandwidth** | DC to 50 kHz | | **Response Time** | < 3 µs | --- ### ## Internal Electronic Components & Operation The HAS-06-R functions based on the **Hall Effect** principle. Its internal circuitry consists of several key stages: 1. **Magnetic Core:** A high-permeability ring that concentrates the magnetic flux generated by the primary current flowing through the center hole. 2. **Hall Generator:** A thin semiconductor wafer placed in the gap of the magnetic core. When current passes through the core, it creates a magnetic field that exerts a Lorentz force on the charge carriers in the Hall element, producing a small "Hall Voltage." 3. **Signal Conditioning Circuit:** * **Amplifier:** Since the raw Hall voltage is very small (millivolts), an internal operational amplifier scales it to the 4V output level. * **Temperature Compensation:** Internal resistors/thermistors adjust the gain to prevent "drift" caused by thermal changes. 4. **Output Stage:** Provides a low-impedance voltage output proportional to the primary current. --- ### ## Pinout and Connection Diagram The device typically features a 4-pin connection for the secondary side: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | +Vc | Positive Supply Voltage (+15V) | | **2** | -Vc | Negative Supply Voltage (-15V) | | **3** | Output | Voltage Signal (proportional to current) | | **4** | 0V | Common Ground | --- ### ## Key Features & Applications * **Galvanic Isolation:** The primary circuit is physically separated from the control electronics, protecting sensitive MCUs or PLCs from high-voltage spikes. * **Low Power Consumption:** Efficient internal circuitry reduces heat dissipation. * **Applications:** * Variable Speed Drives (VFDs). * Uninterruptible Power Supplies (UPS). * Switched Mode Power Supplies (SMPS). * Battery management systems.