Feature: 1. Fit for soft start of water pump, fan, vehicle and ordinary single-phase motor, such motor start module keeps super simple wiring. 2. Soft start controller enables to replace adjustable auto-transformer, inverter soft start, etc. 3. No need to connect bypass contactor, economical and practical, such motor controller is powerful. 4. With high performance for a long time, motor start board is entitled with practical adoptability. 5. Depends on motor start module's simple installation, it is not require particularly complicated operations. Specification: Item Type: Motor start board Type: Module / Module + Radiator (optional) Model: SSR-40WA-R1(1.5KW) (with soft start without soft stop) Voltage Compatibility: Single-phase 220VAC, 2-phase 380VAC, Frequency: 50-60Hz Soft Start Time : Adjustable from 0-30 seconds (the soft start time refers to the whole process of 0-220V, 0-380V) Starting Voltage：Adjustable from 0-50% to the rated voltage (220-380V) Two Ways to Use: 1. When the switch is closed, the main power supply is energized and the soft start begins. 2. Use the switch to control, start by closing the soft start, open the stop The function of two potentiometers in single phase soft start module: Starting potentiometer is the whole 0-50% adjustable, that is, 0 to half the voltage time potentiometer is 0-30 seconds adjustable, corresponding to the whole (220V or 380V,110V) For example: Full adjustment to the minimum: starting voltage 0V soft start 0 seconds (0 seconds is not recommended) 1. Power 220V: Fully adjusted to half, start 55V, soft start time about 22 seconds 2. Power supply 380V: Fully adjusted to half, start 95V, soft start time about 22 seconds 3. Power 220V: When fully adjusted to the maximum, the initial voltage of 110V to 220V takes 15 secondsSize1 : Approx. 92mm / 3.6in Approx. 74mm / 2.9in Approx. 47mm / 1.9in Approx. 104mm / 4.1in Approx. 35mm / 1.4in Approx. 43mm / 1.7in Size 2: Approx. 125mm / 4.9in Approx. 80mm / 3.1in Approx. 110mm / 4.3in Approx. 28mm / 1.1in Approx. 100mm / 3.9in . Package List: 1 x Module