Feature: 1. Motor Start Module supports soft start functionality for water pumps, fans, vehicles, and standard single-phase motors. 2. The soft start controller can replace adjustable auto-transformers, inverters, and other soft start systems. 3. Simple wiring design; no bypass contactor required, making it cost-effective, practical, and efficient. 4. Easy installation with straightforward setupno complex operations needed. 5. Designed for reliable performance, the motor start board is built with high-quality components to ensure long-term durability. Specification: Item Type: Motor Start Board Type: Module / Module + Radiator (optional) Model: SSR-20WA-R1 (1KW) (with soft start, without soft stop) Voltage Compatibility: Single-phase 220VAC, Two-phase 380VAC, Frequency: 5060Hz Soft Start Time: Adjustable from 0 to 30 seconds (refers to voltage rise from 0V to 220V or 0V to 380V) Starting Voltage: Adjustable from 0% to 50% of rated voltage (based on 220V or 380V input) Two Operation Modes: 1. When the switch is closed, main power is connected and soft start initiates automatically. 2. Use an external switch to control operation: close to start (soft start), open to stop. Adjustment Examples: - Starting potentiometer set to halfway: initial voltage ~200V - Maximum soft start time: 30 seconds (reaches full 380V) Power Supply 220V: - Potentiometer at midpoint: initial voltage ~55V, soft start time ~22 seconds - Potentiometer at maximum: voltage rises from 110V to 220V in approximately 15 seconds Power Supply 380V: - Potentiometer at midpoint: initial voltage ~95V, soft start time ~22 seconds - Potentiometer at maximum: voltage rises from 190V to 380V in approximately 15 seconds Dimensions: Size 1: Approx. 92mm x 74mm x 47mm (3.6in x 2.9in x 1.9in) Approx. 104mm x 35mm x 43mm (4.1in x 1.4in x 1.7in) Size 2: Approx. 125mm x 80mm x 28mm (4.9in x 3.1in x 1.1in) Approx. 110mm x 100mm (4.3in x 3.9in) Package List: 1 x Module