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ACH550-UH-023A-4

The ABB ACH550-UH-023A-4 is a 23 Ampere, 11 kW (15 HP) variable frequency drive from the flagship ACH550 series, which is specifically designed and optimized for Heating, Ventilation, and Air Conditioning (HVAC) applications. This model represents a high-performance, feature-rich drive for critical building automation systems, offering superior control, energy savings, and system protection for fans, pumps, and compressors.

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Key Specifications Parameter Category Specification Drive Series/Model ACH550-UH-023A-4 Rated Output Current 23 A Rated Output Power 11 kW (15 HP) Input Supply Voltage 380 - 480 V AC (± 10%), 3-phase Input Supply Phases 3-phase Output Voltage 0 - Input voltage Output Phases 3-phase Enclosure Rating NEMA 3R / Type 3R / IP54. Suitable for indoor/outdoor use. Weather-resistant. Cooling Method Fan-cooled Control Methods Sensorless Flux Control (Magnetizing Flux Control, MFC) Key Standard Features • HVAC-Specific Application Macros: Pre-programmed for AHU, Cooling Tower, Pump, etc. • Advanced PID Control: Dual sets of PID parameters, sleep/wake, PID freeze. • Multi-Pump & Multi-Motor Control: Logic for lead/lag/alternation of up to 4 pumps/fans. • Built-in Building Automation Protocols: BACnet MS/TP, Metasys N2, and Modbus RTU (RS-485) are standard. • Energy Optimizer: Automatically minimizes motor and drive losses for maximum efficiency. • Extended Safeties: Fireman’s Override, Smoke/Fire Control sequences. • LCD Keypad: Multi-language, with parameter copy function. Protection Features • Motor thermal overload protection (I²t) • Pump/Fan-specific protection (dry pump, anti-jam, underload) • Comprehensive electrical protection (short circuit, ground fault, etc.) • Heatsink overtemperature protection • Conformal Coated PCB for protection against corrosive atmospheres (standard in -UH). Application Focus Air Handling Units (AHUs), Cooling Towers, Chilled Water & Condenser Pumps, Exhaust Fans, Compressors in HVAC systems.