The **SVB-B9-R** is an industrial-grade **Emergency Stop (E-Stop) Switch** assembly, typically manufactured by **Schneider Electric (Square D)** under the Vario range. This part is critical for safety circuits in motor control and industrial automation. --- ## 1. Technical Specifications The SVB-B9-R consists of the operator (the handle) and the switch body. Below are the primary electronic and mechanical characteristics: | Property | Description | | :--- | :--- | | **Product Type** | Load Break Switch / Disconnector | | **Poles Description** | 3-Pole (3P) | | **Rated Operational Current (Ie)** | 12 A to 20 A (depending on AC-21/AC-23 rating) | | **Rated Operational Voltage (Ue)** | 690 V AC 50/60 Hz | | **Control Type** | Rotary Handle | | **Handle Color** | Red (Emergency Stop standard) | | **Base/Plate Color** | Yellow | | **Mounting Support** | Door mounting (Front) | --- ## 2. Key Electronic Components ### A. The Switch Body (V0 / V1 / V2) The internal mechanism is a high-performance disconnector. It uses silver-alloy contacts to ensure low resistance and high durability during high-current switching. It is designed to interrupt the power supply to a motor under load (AC-23 rating). ### B. Safety Locking Mechanism The handle includes a built-in padlockable feature. In the **OFF** position, it can be secured with up to three padlocks. This is a vital "Lockout-Tagout" (LOTO) safety feature for maintenance personnel. ### C. Contact Blocks (Optional) While the base unit is a 3-pole switch, it often supports add-on modules: * **Main Poles:** The 3 primary power paths. * **Auxiliary Contacts:** Often added (e.g., VZ7 or VZ20) to provide feedback to a PLC or a control light indicating the switch status. --- ## 3. Circuit Integration In a typical electrical schematic, the SVB-B9-R is placed at the entry point of a control cabinet or directly before a motor. ```mermaid graph LR A[Power Supply] --> B{SVB-B9-R Switch} B --> C[Motor Starter / VFD] C --> D[Industrial Motor] ``` ### Protection Ratings * **IP65:** The front handle is protected against dust and water jets, making it suitable for harsh industrial environments. * **Compliance:** Meets IEC 60947-3 standards for low-voltage switchgear. ---