ABB UAC326AE HIEE401481R0001 Excitation System Module – Key Functions
1. Core Excitation Control
Generator Field Regulation: Provides precise DC current control to rotor windings in synchronous generators/motors (0-125V DC typical range).
Automatic Voltage Regulation (AVR): Maintains terminal voltage stability (±0.5% accuracy) via closed-loop feedback.
2. System Integration
DCS Interface: Communicates with ABB Symphony Plus or 800xA via Modbus TCP or IEC 61850 protocols.
Redundant Configuration: Supports hot-standby parallel operation with auto-failover (MTBF >100,000 hours).
3. Protection & Diagnostics
Fault Protection: Detects field overcurrent (51F), loss-of-excitation (40), and over/under voltage conditions.
Condition Monitoring: Built-in I²t thermal tracking for rotor winding insulation.
4. Applications
Power Plants: Hydro/steam turbine excitation (up to 50MW typical).
Industrial Synchronous Motors: Cement mills, compressor drives.
Marine Power Systems: Shipboard generator control.
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