The **SVB-KA-R/Q** is a specific technical configuration typically associated with **emergency stop (E-Stop)** control units or safety switch disconnectors (often within the Eaton/Moeller product families). Below is a breakdown of the electronic and electromechanical components of this part. --- ### 1. Technical Specifications The device is designed as a main switch or emergency-off assembly. Its electronic parts are focused on high-current switching and safety compliance. | Component | Description | | :--- | :--- | | **Contacts** | Silver-alloy or copper-plated heavy-duty contacts for low resistance. | | **Poles** | Typically 3-pole or 4-pole configurations. | | **Locking Mechanism** | Mechanical interlocking with "Red/Yellow" (R/Q) safety colors. | | **Terminals** | Box terminals for secure wiring of stranded or solid cables. | | **Rated Voltage** | Usually rated up to 690V AC. | --- ### 2. Key Electronic Features #### A. Contact Blocks The internal contact blocks are the "heart" of the device. They are engineered to: * **Prevent Contact Welding:** Materials are chosen to resist high-inrush currents. * **Positive Opening:** Ensures that the circuit is physically broken even if a light weld occurs (essential for safety certification). #### B. Ingress Protection (IP Rating) The electronic integrity is protected by an outer casing, typically rated **IP65**. This ensures that dust and moisture do not interfere with the electrical conductivity of the internal parts. #### C. Handle Assembly (R/Q Variant) * **R (Red):** The color of the rotary handle. * **Q (Yellow):** The color of the locking collar. * This color combination is internationally recognized for **Emergency Stop** functions according to IEC/EN 60204-1. --- ### 3. Application Use-Case These parts are used as the interface between the power supply and industrial machinery. ```mermaid graph LR Power_In[Main Power] --> SVB_Switch[SVB-KA-R/Q] SVB_Switch --> Control_Panel[Machine Control] SVB_Switch -- Manual Trip --> Power_Cut[Emergency Stop] ``` --- ### 4. Part Number Breakdown * **SVB:** Safety Variable Block (Switch-disconnector). * **KA:** Represents the specific housing or assembly kit style. * **R/Q:** Red handle on a Yellow background (Safety designation). ---