The **HAS-H0-R** is a specific electronic component within the **HAS Series** of Hall Effect Current Sensors, typically manufactured by **LEM**. These sensors are designed for the non-intrusive measurement of DC, AC, and pulsed currents with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic interface). --- ### 1. Technical Specifications The "H0-R" suffix often indicates specific mounting or output configurations. Below are the typical specifications for this series: | Feature | Specification | | :--- | :--- | | **Sensor Type** | Open Loop Hall Effect | | **Primary Nominal Current ($I_{pn}$)** | 50A to 600A (depending on sub-model) | | **Supply Voltage ($V_c$)** | ±15V DC (Dual Supply) | | **Output Signal** | Analog Voltage (typically ±4V at $I_{pn}$) | | **Accuracy** | ±1% of $I_{pn}$ | | **Bandwidth** | DC to 50 kHz | | **Isolation Voltage** | 3kV or 3.5kV RMS | --- ### 2. Internal Electronic Components The device operates using three main stages internally: 1. **Magnetic Core:** A high-permeability ring that concentrates the magnetic field generated by the primary current. 2. **Hall Generator:** A semiconductor thin film located in the gap of the core. It detects the magnetic flux density and converts it into a small millivolt signal. 3. **Signal Conditioning Circuit:** * **Operational Amplifiers:** Scale and buffer the tiny Hall voltage. * **Temperature Compensation:** Internal resistors and thermistors that stabilize the reading against thermal drift. * **Output Stage:** Provides a low-impedance voltage output proportional to the primary current. --- ### 3. Connection Pinout While exact pinouts can vary, the HAS series generally utilizes a 4-pin connection system: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | $+V_c$ | Positive supply voltage (+15V) | | **2** | $-V_c$ | Negative supply voltage (-15V) | | **3** | **Output** | Analog voltage signal | | **4** | **0V / GND** | Common ground reference | --- ### 4. Key Advantages * **Galvanic Isolation:** The measuring circuit is electrically separated from the high-voltage conductor, ensuring safety for microcontrollers and PLCs. * **High Dynamic Performance:** Capable of tracking fast current transients (di/dt). * **Low Power Consumption:** Efficient internal electronics minimize heat generation within the sensor housing. ---