The **L2PE-61-R** is a specific model of a **Miniature Circuit Breaker (MCB)**, typically part of the L-Series produced by manufacturers like Fuji Electric. It is designed for protecting electrical circuits from overcurrents and short circuits. --- ### 1. Technical Specifications The following table summarizes the primary electronic and mechanical characteristics of the L2PE-61-R: | Feature | Specification | | :--- | :--- | | **Type** | Miniature Circuit Breaker (MCB) | | **Number of Poles** | 1-Pole (Single Pole) | | **Rated Current ($I_n$)** | Typically 1A to 63A (Check specific variant) | | **Rated Voltage ($U_e$)** | 230V / 400V AC | | **Breaking Capacity** | 6kA or 10kA (Standard for L-Series) | | **Tripping Curve** | Type C (Standard for general inductive loads) | | **Mounting** | DIN Rail (35mm) | | **Termination** | Screw Terminals | --- ### 2. Core Electronic Components & Operation While an MCB is an electromechanical device, its "parts" function together to monitor and interrupt electrical flow: #### A. Thermal Tripping Unit (Bimetallic Strip) * **Function:** Handles **Overload Protection**. * **Operation:** Consists of two bonded metals with different expansion rates. As current exceeds the rated limit, the strip heats up and bends, eventually triggering the mechanical latch to open the circuit. #### B. Magnetic Tripping Unit (Solenoid) * **Function:** Handles **Short-Circuit Protection**. * **Operation:** In the event of a massive surge (short circuit), an electromagnetic coil (solenoid) creates a strong magnetic field that instantly pulls a plunger to trip the breaker. #### C. Arc Chute * **Function:** Extinguishes the electric arc. * **Operation:** When the contacts separate under load, an arc is formed. The arc chute consists of parallel metal plates that break the arc into smaller segments, cooling it and quenching it safely. #### D. Contact System * **Material:** Usually silver-plated copper or silver-cadmium oxide to ensure high conductivity and resistance to welding during high-heat events. --- ### 3. Application Use Cases * **Residential:** Protecting lighting circuits and standard socket outlets. * **Commercial:** HVAC control panels and office power distribution. * **Industrial:** Protection of control transformers and small motor circuits where "Type C" curves prevent nuisance tripping during start-up. ---