The **SVB-39-R/E** is a specific electrical/electronic component primarily used in industrial safety and isolation systems. It is part of the **Vario** series manufactured by **Schneider Electric (Telemecanique)**. Below is a breakdown of its technical specifications and electronic properties. --- ### 1. Component Overview The SVB-39-R/E is a **Switch Disconnector** (also known as a Load Break Switch). It is designed to manually interrupt power to a circuit, typically for emergency stops or maintenance isolation. ### 2. Technical Specifications | Feature | Specification | | :--- | :--- | | **Series** | TeSys Vario | | **Device Short Name** | V3 (Switch body) + Handle assembly | | **Number of Poles** | 3 Poles (3P) | | **Rated Operational Voltage ($U_e$)** | 690 V AC 50/60 Hz | | **Thermal Current ($I_{th}$)** | 63 A | | **Rated Operational Power** | 15 kW at 400 V (AC-23) | | **Control Type** | Rotary Handle (Red/Yellow for Emergency) | | **Mounting Support** | Door mounting (Front) | --- ### 3. Electronic & Mechanical Functions * **Positive Opening Operation:** The contacts are designed to be forced open mechanically, ensuring the circuit is truly broken even if a minor weld occurs. * **Safety Interlock:** The handle is padlockable (up to 3 padlocks). When locked in the "OFF" position, the electrical contacts are physically separated, preventing accidental restarts. * **Utilization Categories:** * **AC-21:** Switching of resistive loads. * **AC-23:** Switching of motor loads or other highly inductive loads. * **Ingress Protection:** The front handle assembly typically carries an **IP65** rating, making it dust-tight and resistant to water jets, suitable for industrial environments. ### 4. Typical Connection Diagram (Pseudo-code Logic) In a standard 3-phase motor application, the wiring logic follows this structure: ```cpp // Schematic Representation of Power Flow [Power Source: L1, L2, L3] | v [SVB-39-R/E Switch Terminals: 1, 3, 5] | |--- (Manual Rotary Actuation) ---| | [SVB-39-R/E Output Terminals: 2, 4, 6] | v [Load: Industrial Motor / Machine] ``` --- ### 5. Application Areas 1. **Local Isolation:** Used near a motor to allow technicians to cut power locally without going back to the main distribution board. 2. **Emergency Stop:** The red handle on a yellow background signifies its use as an emergency disconnect according to IEC standards. 3. **Control Panels:** Integrated into the doors of electrical enclosures.