The **SVB-BC-R/E** is a specific model of an emergency stop / main switch assembly, typically manufactured by companies like **Eaton (Moeller)**. It belongs to the **Rotary Disconnect** family and is used to control the power supply to industrial machinery. Below is a detailed breakdown of its electronic and mechanical parts. --- ### 1. Component Overview The model name generally breaks down into functional categories: * **SVB**: Safety Variable (Main switch handle). * **BC**: Basic Configuration / Base mounting. * **R/E**: Red/Yellow Emergency Stop coloring (Red handle, Yellow base). ### 2. Electronic & Technical Specifications While this part is primarily electromechanical, its electronic ratings define its application limits: | Feature | Specification | | :--- | :--- | | **Max Voltage (Ue)** | Up to 690V AC | | **Rated Current (Iu)** | Typically 20A to 32A (model dependent) | | **Utilization Category** | AC-23A (Switching of motor loads or highly inductive loads) | | **Pole Configuration** | Usually 3-Pole (standard), expandable to 4 or 5 poles | | **Protection Class** | IP65 (Dust tight, protected against water jets) | --- ### 3. Key Electronic/Mechanical Parts #### A. The Rotary Handle (Actuator) The red handle is the user interface. * **Locking Mechanism:** Integrated "padlocking" feature that allows the switch to be locked in the "OFF" position for LOTO (Lock-Out Tag-Out) safety procedures. * **Emergency Function:** The Red/Yellow color scheme signifies it is rated for Emergency Stop functions. #### B. The Switch Body (Contact Block) The core "electronic" part that makes or breaks the circuit. * **Silver Contacts:** High-conductivity contacts designed to withstand arcing when switching high-current motor loads. * **Auxiliary Contacts:** Many units allow for the addition of side-mounted auxiliary contacts (1NO/1NC) to send a signal to a PLC (Programmable Logic Controller) regarding the switch status. #### C. The Shaft (Coupling) The metal or plastic rod that connects the external handle to the internal switch body if the unit is mounted in a deep enclosure. --- ### 4. Installation & Safety Use 1. **Mounting:** Designed for front-panel mounting or base mounting in a control cabinet. 2. **Safety Interlock:** The handle is designed so that the cabinet door cannot be opened while the switch is in the "ON" position (Interlock feature). 3. **Standard Compliance:** Meets IEC/EN 60947-3 and VDE 0660 standards for low-voltage switchgear. ---