The **METSECT5MB040** is a specific model of a Current Transformer (CT) from the Schneider Electric **PowerLogic** range. It is primarily used for energy metering and monitoring applications to scale down high currents to a level compatible with measurement devices. --- ### 1. Technical Specifications The following table summarizes the core electronic and physical attributes of the METSECT5MB040: | Feature | Specification | | :--- | :--- | | **Primary Current** | 400 A | | **Secondary Current** | 5 A | | **Accuracy Class** | Class 0.5 at 6 VA / Class 1 at 8 VA | | **Type** | Tropicalized (for humid/harsh environments) | | **Mounting Mode** | By screws or clip-on (DIN rail or plate) | | **Busbar Dimensions** | 30 x 10 mm / 25 x 12.5 mm / 20 x 15 mm | | **Insulation Voltage** | 720 V AC 50/60 Hz | | **Compliance** | IEC 61869-2 & VDE 0414 | --- ### 2. Key Electronic Components & Design The device functions based on the principle of **Electromagnetic Induction**. Its internal "parts" consist of: * **Toroidal Magnetic Core:** A high-permeability steel core that concentrates the magnetic flux generated by the primary cable (the wire carrying the 400A). * **Secondary Winding:** Multiple turns of copper wire wrapped around the core. This is where the secondary 5A current is induced. * **Encapsulation (Casing):** Made of flame-retardant, UL94V-0 rated plastic. The "Tropicalized" designation means the internals are protected against high humidity and temperature fluctuations. * **Terminals:** Secure screw-clamp terminals for connecting the 5A output to a power meter (such as a PowerLogic PM5000 series). --- ### 3. Application Use-Case The METSECT5MB040 acts as the "sensor" for power management systems. It is typically installed in an electrical distribution board. 1. **Step-Down:** It transforms the 400A flowing through a main busbar down to 5A. 2. **Isolation:** It provides galvanic isolation between the high-power circuit and the sensitive electronic meter. 3. **Accuracy:** Being **Class 0.5**, it is precise enough for sub-billing and energy cost allocation. --- ### 4. Installation Diagram (Simplified) ```text [ Main Power Cable (400A) ] | +-----|-----+ | [ CT ] | <-- METSECT5MB040 +-----|-----+ | (Secondary Output 5A) +------> [ Power Meter / PLC ] ``` ---