The **SVB-KZ-R/K** is a specific model of an **Emergency Stop Switch (Main Switch)** assembly, typically manufactured by companies like Eaton (Moeller) or similar industrial control providers. It is designed for mounting on control panels and electrical cabinets. Below is a breakdown of its electronic and mechanical components. ### 1. Component Overview The assembly consists of several modular parts that work together to provide a safety disconnection point for industrial machinery. | Component | Description | Function | | :--- | :--- | :--- | | **Rotary Handle** | Red/Yellow high-visibility handle. | Manual interface for turning the power ON/OFF. | | **Switch Body** | The internal contact block (P1 or P3 series). | The physical electrical interrupter. | | **Shaft/Extension** | Metal or plastic rod. | Connects the door handle to the switch body inside the cabinet. | | **Locking Ring** | Padlockable collar. | Safety feature (LOTO - Lock Out Tag Out). | --- ### 2. Electrical Specifications While specifications can vary based on the specific "P-series" switch body attached, the SVB-KZ-R/K configuration generally follows these parameters: * **Switching Capacity:** Usually rated for **25A to 63A** (depending on the internal switch unit). * **Voltage Rating:** Typically rated up to **690V AC**. * **Utilization Category:** AC-23A (Switching of motor loads or other highly inductive loads). * **Pole Configuration:** Available in 3-pole (standard) or 3-pole + Neutral. * **Auxiliary Contacts:** Can often be fitted with extra NO/NC (Normally Open/Normally Closed) contacts for signaling a PLC or controller. --- ### 3. Key Electronic Features * **Positive Operation:** The contacts are designed to be "positively driven," meaning they are physically forced apart to ensure the circuit is broken even if a light weld occurs. * **Isolation Properties:** It serves as a "Main Disconnect," providing a physical air gap between contacts to ensure no current leakage during maintenance. * **Ingress Protection (IP):** The front handle is usually rated **IP65**, protecting the electronics inside from dust and powerful water jets. * **Interlock Mechanism:** The "KZ" designation often refers to a door-coupling handle that prevents the cabinet door from being opened while the power is "ON." --- ### 4. Typical Wiring Diagram (Example) The following is a simplified representation of how the terminals are typically mapped on a 3-pole version: ```text L1 L2 L3 (Incoming Power) | | | [ 1 3 5 ] <-- Switch Body Terminals [ 2 4 6 ] <-- Load Terminals | | | T1 T2 T3 (To Motor/Machine) ``` ---