Technical Parameters Parameter Specification / Value Drive Series & Model ABB ACH550 HVAC Drive Product Code ACH550-UH-157A-4 Rated Output Power 90 kW (125 HP) Rated Output Current 157 A Input Supply Voltage 3-phase, 380 – 500 V AC (±10%), 50/60 Hz (UH = Universal Voltage High Range) Output Frequency Range 0 – 590 Hz Control Method Sensorless Vector Control (DTC Platform) with flux optimization. Enclosure Class IP21 / UL Type 1 (Chassis Type). Requires installation in a suitable enclosure (e.g., IP54 cabinet). Built-in EMC Filter Class A (Standard for industrial/HVAC environments). Standard Communication Protocols BACnet MS/TP, Metasys N2, Modbus RTU (RS-485). Optional Communication LonWorks, Profibus DP, DeviceNet, Johnson Controls N2. Digital/Analog I/O 3 Digital Inputs (DI) 2 Digital Outputs (DO) (1 Relay, 1 Transistor) 1 Analog Input (AI) (0/4–20 mA or 0–10 V) 2 Analog Outputs (AO) (0/4–20 mA) Key HVAC Application Features • Dual PID Controllers (with feedback and feedforward) • Pump & Fan Specific Curves (Affinity Laws) • Sleep/Wake Function • Fire/Smoke Control Override Mode • Automatic Energy Optimization (AEO) • Lead/Lag Pump Control Logic Overload Capacity 110% of rated current for 60 seconds (standard for HVAC loads). Braking Chopper Not internally integrated. Supports connection of an external brake resistor. Cooling Method Forced Air Cooling (temperature-controlled fan). Protection Features Motor thermal overload, short circuit, ground fault, over/under voltage, phase loss, drive overheating, frost protection, freeze protection. Operating Temperature -15°C to +50°C (without derating, suitable for most mechanical rooms). Relative Humidity 5–95% (non-condensing). Mounting Wall mounting (vertical orientation recommended). Approvals & Standards CE, cULus, RoHS, IEC 61800-5-1, EN 61800-3, BACnet BTL listed.