Technical Parameters (SK3402) Model: SK3402 Series: Commander SK Product Type: AC Variable Frequency Drive (Inverter) Input Phase: Three-phase Input Voltage: 380V to 480V AC ±10% Input Frequency: 48 to 62 Hz Typical Power Ratings (Three-phase 400V input): 2.2 kW (3 HP) - standard for SK3402 Output Current: At 2.2kW: 5.1 A (typical at 400V) Output Voltage: 3-phase, 0 to rated input voltage (variable frequency) Output Frequency: 0 to 1500 Hz (programmable) Control Mode: Open-loop Vector (Sensorless) / V/Hz Switching Frequency: 3 kHz to 16 kHz (adjustable, derating above 6 kHz) Overload Capacity: 150% for 60 seconds (Normal Duty rating) Digital Inputs: 4 x programmable digital inputs Analog Input: 1 x analog input (0-10V, 4-20mA selectable) Analog Output: 1 x analog output (0-10V) Relay Output: 1 x changeover relay output (programmable) Communications: Standard MODBUS RTU (RS485) via RJ45 Braking: Standard dynamic braking unit (integrated transistor) Protection Class: IP20 (requires enclosure for installation) Operating Temperature: -10°C to +40°C (at 3 kHz switching frequency, derating to 50°C) Cooling Method: Natural convection or forced air (depending on configuration) Dimensions (H x W x D): Approx. 150 mm x 70 mm x 120 mm (5.9" x 2.8" x 4.7") - typical for size 1 Weight: Approx. 1.0 kg (2.2 lbs) Standards: CE, UL, cUL, EN61800-3, RoHS Typical Applications Conveyors: Material handling, packaging lines, assembly lines Pumps: Centrifugal pumps, booster pumps, dosing pumps Fans: Ventilation fans, exhaust fans, blowers Mixers: Industrial mixers and agitators Machine Tools: Spindle control, auxiliary drives Food Processing: Mixing, conveying, filling applications Textile Machinery: Winding, spinning, auxiliary drives HVAC: Air handling units, fan coils General Automation: Various industrial machines requiring variable speed control