## Technical Overview: 8536SHO2V06H674 The **8536SHO2V06H674** is a specific configuration of a **NEMA Type S Magnetic Motor Starter** manufactured by Schneider Electric (Square D). It is designed for starting and stopping AC motors across the line while providing overload protection. --- ### 1. Part Number Breakdown To understand the electronic and mechanical parts, we must decode the product string: | Segment | Code | Description | | :--- | :--- | :--- | | **Product Type** | 8536 | NEMA Magnetic Motor Starter (Non-reversing) | | **Size** | S | NEMA Size 6 (Rated for high current/HP) | | **Enclosure** | H | Open Style (No enclosure, intended for control panels) | | **Form** | O | Open (Integrated into existing systems) | | **Voltage Code** | V06 | 480V AC, 60Hz Coil (Standard Control Voltage) | | **Options** | H674 | Specific modification code (Internal/External modifications) | --- ### 2. Core Electronic and Electromechanical Components This device is comprised of several critical parts that work in tandem to manage high-voltage motor loads: #### A. The Contactor (Size 6) * **Purpose:** The main switching mechanism. * **Function:** Uses a 480V electromagnetic coil to pull in heavy-duty silver-alloy contacts. * **Rating:** NEMA Size 6 starters are heavy-duty, typically rated for up to **400 Amperes** and approximately **400 HP at 460V**. #### B. The Magnetic Coil (V06) * **Voltage:** 480V AC. * **Operation:** When the control circuit is energized, this coil creates a magnetic field that closes the main power poles. * **Maintenance:** This is a replaceable part if the coil burns out due to voltage spikes or mechanical binding. #### C. Thermal Overload Relay * **Protection:** Protects the motor from drawing too much current (overheating). * **H-Suffix/Mod:** Usually indicates a specific melting alloy (Eutectic) or bimetallic overload block. * **Operation:** If current exceeds the trip setting, the heat melts a specialized solder or bends a strip, opening the control circuit and dropping the contactor out. #### D. Auxiliary Contacts * **Function:** These are smaller contacts used for signaling (e.g., turning on a "Running" light or providing feedback to a PLC). * **Configuration:** Typically comes with one Normally Open (N.O.) holding circuit contact. --- ### 3. Technical Specifications | Feature | Specification | | :--- | :--- | | **NEMA Size** | 6 | | **Continuous Ampere Rating** | 540A | | **Phase** | 3-Phase | | **Coil Voltage** | 480V AC @ 60 Hz / 440V AC @ 50 Hz | | **Mounting Type** | Surface / Panel | | **Overload Type** | Thermal (Specific to H-code configuration) | --- ### 4. Summary of H674 Modification The **H674** suffix represents a specialized factory modification. In the Square D ecosystem, "H" codes often refer to: * Specific types of solid-state or thermal overload blocks. * Modifications to the control circuit (e.g., addition of specific fuses or isolated contacts). * *Note: For precise H-code internal wiring, a factory data sheet for that specific serial number is required.* ---