The **SVB-FD-R/CE** is a specific electronic component assembly typically used in industrial automation, specifically associated with **safety disconnect switches** (often from manufacturers like Eaton/Moeller). This part number refers to a rotary handle assembly for use with molded case circuit breakers (MCCBs) or switch-disconnectors. --- ### 1. Technical Specifications The unit serves as the interface between the operator and the internal switching mechanism. | Feature | Description | | :--- | :--- | | **Component Type** | Rotary Door-Coupling Handle | | **Compatibility** | NZM1, NZM2 Series Circuit Breakers | | **Protection Rating** | IP66 / UL/CSA Type 4X, 12 (Dust and Water tight) | | **Function** | Emergency Stop / Main Switch (Red/Yellow coding) | | **Locking Mechanism** | Padlockable in the OFF position (up to 3 padlocks) | --- ### 2. Key Electronic & Mechanical Components #### A. Door Coupling Mechanism The electronic/mechanical bridge consists of a long extension shaft that connects the handle on the cabinet door to the actual circuit breaker inside the enclosure. It includes a **trip-indication** feature, allowing the handle to reflect the "Tripped" state of the internal breaker. #### B. Safety Interlocks * **Door Interlock:** Prevents the cabinet door from being opened when the switch is in the "ON" position. * **Defeat Mechanism:** In specific industrial scenarios, authorized personnel can bypass the interlock for maintenance using a specialized tool, though the handle remains "Electrically" safe. #### C. Auxiliary Contacts (Optional Integration) While the SVB-FD-R/CE is a handle assembly, it is designed to work in tandem with electronic **Auxiliary (HI)** and **Trip-Indicating (HIA)** contacts: * **Voltage:** Usually rated for 230V AC or 24V DC control circuits. * **Purpose:** Sends an electronic signal to a PLC (Programmable Logic Controller) or a pilot light to indicate the status of the switch. --- ### 3. Installation Logic The assembly follows a modular electronic design: 1. **The Base:** The MCCB (Circuit Breaker) mounted on the DIN rail or backplate. 2. **The Shaft:** A square metal or heavy-duty plastic rod. 3. **The SVB-FD-R/CE Handle:** Mounted on the exterior door. --- ### 4. Certification Standards * **CE:** Complies with European safety, health, and environmental protection requirements. * **IEC/EN 60947:** Standards for low-voltage switchgear. * **UL/CSA:** Certified for the North American market.