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 requires no bypass contactor connection, offering an economical, practical, and efficient solution. 4. Easy installation process with no complex operations required. 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, 2-phase 380VAC, Frequency: 50-60Hz Soft Start Time: Adjustable from 0 to 30 seconds (refers to the full voltage rise from 0 to 220V or 0 to 380V) Starting Voltage: Adjustable from 0% to 50% of rated voltage (220V–380V) Two Ways to Use: 1. When the switch is closed, the main power supply is energized and soft start begins. 2. Use the switch to control operation: close to start (soft start initiates), open to stop. Adjustment Examples: - Starting potentiometer set to halfway: starting voltage at 200V - Maximum soft start time: 30 seconds (corresponds to full range up to 380V) Power Supply 220V: - Potentiometer set to halfway: initial voltage 55V, soft start time approximately 22 seconds - Potentiometer set to maximum: initial voltage 110V, rises to 220V over 15 seconds Power Supply 380V: - Potentiometer set to halfway: initial voltage 95V, soft start time approximately 22 seconds - Potentiometer set to maximum: initial voltage 190V, rises to 380V over 15 seconds 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 110mm (4.9in x 3.1in x 4.3in) Approx. 28mm x 100mm (1.1in x 3.9in) Package List: 1 x Module