Technical Parameters Parameter Specification / Value Drive Series & Model ABB ACS550 General Purpose Drive Product Code ACS550-01-157A-4 Rated Output Power 90 kW (125 HP) Rated Output Current 157 A Input Supply Voltage 3-phase, 200 - 240 V AC (±10%) (*The "-01" suffix denotes this specific low-voltage range*) Input Supply Frequency 47 - 63 Hz Output Frequency Range 0.1 - 500 Hz Control Method Scalar Control (Volts/Hertz) with advanced flux optimization (AEO). Enclosure Class IP21 / UL Type 1 (Chassis Type). Must be installed in a proper electrical enclosure. Built-in EMC Filter Not Standard at this power level. An external EMC/RFI filter is typically required for compliance. Fieldbus Interface Integrated Modbus RTU (RS-485). Optional fieldbus adapters available. Digital/Analog I/O 3 Digital Inputs (DI) 1 Digital Output (DO) - Relay 1 Analog Input (AI) (0/4-20 mA or 0-10 V) 1 Analog Output (AO) (0/4-20 mA) Key Application Features • Dual Independent PID Controllers • Sleep/Wake & Catch a Spinning Motor • Automatic Energy Optimization (AEO) • Customizable U/f Curves • Flying Start Overload Capacity 110% of rated current for 60 seconds (suited for centrifugal pump/fan loads). Braking Chopper Not internally integrated. Requires an external brake resistor unit for applications needing fast deceleration or overhauling loads. Cooling Method Forced air cooling (internal fan). Protection Features Full suite: Motor thermal (I²t) protection, short circuit, ground fault, over/under voltage, input phase loss, drive overheating, etc. Operating Temperature -10°C to +40°C (without derating). Derating required above 40°C. Connection Terminals Screw terminals for power (R/L1, S/L2, T/L3, U, V, W) and control. Mounting Wall mounting (vertical orientation recommended). Approvals & Standards CE, cULus, RoHS, IEC 61800-5-1, EN 61800-3.