The **8536SHO2V02SX22** is a specific configuration of a NEMA-rated magnetic motor starter from the Square D (Schneider Electric) Type S line. These devices are used to start and stop electric motors while providing thermal overload protection. ### 1. Breakdown of the Model Number Understanding the specific parts requires decoding the nomenclature: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **8536** | Type | NEMA Magnetic Motor Starter | | **S** | Series | Type S Series (Compact design) | | **H** | NEMA Size | Size 3 (Handles up to 50 HP @ 460V) | | **O** | Enclosure | Open Style (No metal box; intended for panel mounting) | | **2** | Number of Poles | 3-Pole (Standard for 3-phase motors) | | **V02** | Coil Voltage | 120V AC, 60Hz / 110V AC, 50Hz | | **S** | Auxiliary Contact | One Normally Open (N.O.) Holding Circuit Contact | | **X22** | Special Feature | **2 NO / 2 NC** Additional Auxiliary Contacts | --- ### 2. Core Electronic and Mechanical Components #### A. The Magnetic Contactor The heart of the unit. It consists of: * **The Coil (V02):** An electromagnetic solenoid. When 120V is applied, it creates a magnetic field that pulls the power contacts shut. * **Power Contacts:** Heavy-duty silver-alloy points designed to carry the high amperage required by a Size 3 motor (up to 90 Amps continuous). #### B. The Overload Relay This unit includes a **Melting Alloy Overload Relay**. * **Function:** It monitors the current drawn by the motor. If the current stays too high for too long, the heat melts a specialized solder alloy inside a "thermal unit" (heater), which trips a mechanical switch to cut power to the coil. * *Note:* Heaters are sold separately based on the Motor's Full Load Amps (FLA). #### C. Auxiliary Contacts (X22) The "X22" suffix indicates this unit is modified with extra signaling switches. * **Purpose:** These do not power the motor. Instead, they send signals to PLCs, pilot lights, or other starters. * **Configuration:** You have two Normally Open (closes when the motor starts) and two Normally Closed (opens when the motor starts) contacts. --- ### 3. Technical Specifications | Feature | Specification | | :--- | :--- | | **Current Rating** | 90 Amperes | | **Phase** | 3-Phase | | **Max Voltage** | 600V AC | | **Control Voltage** | 120V AC (Standard Control Circuit) | | **Mounting** | Vertical Panel Mount | | **Reset Type** | Manual Reset (on the overload block) | --- ### 4. Typical Applications * **Industrial Pumps:** High-capacity water or chemical pumps. * **Conveyor Systems:** Heavy-duty belts requiring integrated signaling (via X22 contacts) for jams or status. * **HVAC Blowers:** Large scale commercial air handling units. ---