The **8736SDO2V08** is a specific model of a **Reversing Magnetic Starter** manufactured by Schneider Electric under the Square D brand. It is primarily used in industrial automation to control the direction and operation of three-phase electric motors. --- ## 1. Technical Specifications The part number follows a specific nomenclature used by Square D (NEMA style). Below are the core technical details: | Feature | Specification | | :--- | :--- | | **Type** | Reversing Magnetic Starter (NEMA Type S) | | **NEMA Size** | Size 2 (Handles higher current than Size 0 or 1) | | **Poles** | 3-Pole (For 3-Phase AC systems) | | **Voltage Rating** | 600V AC Maximum | | **Coil Voltage** | 208V AC @ 60Hz | | **Enclosure Type** | Open (No external box; intended for panel mounting) | | **Overload Relay** | Motor Logic Solid State Overload Relay | --- ## 2. Key Electronic Components ### A. Reversing Contactors The unit consists of two mechanically and electrically interlocked contactors. * **Function:** One contactor handles the "Forward" rotation, and the second handles the "Reverse" rotation. * **Interlock:** The mechanical interlock prevents both contactors from closing simultaneously, which would cause a phase-to-phase short circuit. ### B. Magnetic Coil (V08) The "V08" suffix identifies the coil voltage. * **Operation:** When 208V AC is applied to the coil, it creates a magnetic field that pulls the power contacts closed. * **Maintenance:** These coils are replaceable if they burn out due to voltage spikes or mechanical binding. ### C. Solid State Overload Relay (SSOLR) Unlike older heaters, this model typically features a **Motor Logic** solid-state relay. * **Protection:** It monitors current flow and trips the circuit if it detects an overload, phase loss, or phase unbalance. * **Adjustability:** It allows for a wide range of current settings (FLA - Full Load Amps) via a dial, rather than requiring physical thermal melting heaters. --- ## 3. Applications and Usage The 8736SDO2V08 is commonly found in environments requiring heavy-duty motor control, such as: 1. **Conveyor Belts:** To move goods forward and backward. 2. **Industrial Hoists/Cranes:** For lifting and lowering operations. 3. **Machine Tools:** Lathes or mills that require bi-directional spindle rotation. --- ## 4. Wiring Overview The power circuit involves reversing two of the three phases to change motor direction. ```text L1 ----|---- Contactor 1 (FWD) ----|---- T1 (Motor) L2 ----| |---- T2 (Motor) L3 ----| |---- T3 (Motor) L1 ----|---- Contactor 2 (REV) ----|---- T3 (Motor) <-- Phases Swapped L2 ----| |---- T2 (Motor) L3 ----| |---- T1 (Motor) <-- Phases Swapped ```