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ACH550-UH-059A-4+B055

The ABB ACH550-UH-059A-4+B055 is a fully configured 59 Ampere, 30 kW (40 HP) variable frequency drive from the ACH550 series, specifically engineered and optimized for Heating, Ventilation, and Air Conditioning (HVAC) applications. This package includes a critical factory-installed option for safe motor deceleration, making it a complete solution for demanding HVAC systems.

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Key Specifications Parameter Category Specification Drive Series/Base Model ACH550-UH-059A-4 Rated Output Current 59 A Rated Output Power 30 kW (40 HP) Input Supply Voltage 380 - 480 V AC (± 10%), 3-phase Output Voltage/Phases 3-phase, 0 - Input voltage Enclosure Rating NEMA 3R / Type 3R / IP54. Suitable for indoor/outdoor use. Weather-resistant. Cooling Method Fan-cooled Control Method ABB's Sensorless Flux Control (Magnetizing Flux Control, MFC) for HVAC. Key Standard Features • HVAC-Optimized Software: Advanced PID, multi-pump/fan control. • Built-in Building Protocols: BACnet MS/TP and Metasys N2 standard. • Energy Optimizer: Automatically minimizes losses for efficiency. • LCD Keypad with multi-language support. • Extended Safety: Fireman’s Override, smoke control. • Conformal Coated PCB (standard in -UH). Option +B055 External Braking Resistor Unit • Function: Provides a path to dissipate regenerative braking energy. • Includes: Internal DC brake chopper and an external, pre-selected braking resistor assembly. • Purpose: Enables controlled deceleration of high-inertia loads (fans, pumps) and prevents drive overvoltage trips during stopping. Extends the drive's application range. Protection Features • Comprehensive motor thermal and electrical protection. • Drive overtemperature protection. • Braking resistor thermal protection (via +B055 unit). Application Focus Large Air Handling Units (AHUs), Cooling Towers, Large Pumps (Chilled/Condenser Water), Industrial Exhaust Fans.