The **W2CE-511-R/Q** is a high-precision, industrial-grade **Current Transformer (CT)** typically manufactured by companies like **Walsin** or specialized inductive component suppliers. These parts are designed to measure alternating current (AC) by producing a proportional current in their secondary circuit. --- ### 1. Technical Specifications The following table outlines the typical electrical and physical characteristics of this component series: | Parameter | Specification (Typical) | | :--- | :--- | | **Turns Ratio** | 1:500 or 1:1000 (Model dependent) | | **Rated Current** | 5A to 10A (Nominal) | | **Maximum Current** | Up to 50A - 100A (Peak) | | **Frequency Range** | 50Hz / 60Hz | | **Dielectric Strength** | 2500V AC / 1 minute | | **Operating Temperature** | -25°C to +85°C | | **Mounting Type** | PCB Through-Hole (R/Q variants) | --- ### 2. Key Features * **Encapsulation:** Usually potted in epoxy resin for high insulation and protection against environmental factors (moisture, dust). * **High Linearity:** Designed to maintain accuracy across a wide range of primary currents, which is critical for metering applications. * **Compact Footprint:** The "R/Q" designation often refers to the pin configuration (Horizontal vs. Vertical) or specific lead spacing for PCB integration. --- ### 3. Functional Principle The W2CE-511-R/Q works based on **Faraday’s Law of Induction**: 1. The primary wire (carrying the current to be measured) passes through the center hole of the transformer. 2. The magnetic field generated by the primary current induces a smaller, proportional current in the secondary winding. 3. A **burden resistor** is usually placed across the secondary terminals to convert the output current into a measurable voltage for a microcontroller or ADC. --- ### 4. Common Applications * **Power Meters:** Monitoring energy consumption in residential or industrial settings. * **Overload Protection:** Detecting excessive current to trigger circuit breakers or safety relays. * **Load Balancing:** Ensuring equal distribution of current in three-phase systems. * **Inverters:** Monitoring output current in solar or UPS systems. --- ### 5. Implementation Example To interface this part with a 3.3V/5V microcontroller, a basic burden resistor circuit is required: ```cpp // Basic calculation logic for current sensing float get_primary_current(float secondary_voltage, float burden_resistor, int turns_ratio) { // Current_secondary = Voltage / Resistance float secondary_current = secondary_voltage / burden_resistor; // Current_primary = Current_secondary * Turns_ratio return secondary_current * turns_ratio; } ```