The ABB FM9925A‑E (HIEE45116R0001) is a high‑precision feedback measuring board for ABB UNITROL generator excitation systems. It samples generator voltage, current and other analog feedback signals, and transmits processed data to main controller for closed‑loop excitation regulation.
Main Specifications
- Brand: ABB; Model: FM9925A‑E; Part No.: HIEE45116R0001; Type: Feedback Measuring Board
- Applicable System: UNITROL series generator excitation control platform
- Function: Multi‑channel analog signal acquisition, filtering and data transmission
- Feature: Galvanic isolation, high measuring accuracy for power‑generation equipment
- Installation: Rack‑mounted inside generator excitation control cabinet
- Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing
- Certifications: CE, compliant with power automation equipment standards
Core Functions
- Collect real‑time voltage and current feedback signals from synchronous generator.
- Complete signal filtering and analog‑digital conversion for high‑precision measurement.
- Send sampled data to main control board for automatic voltage closed‑loop regulation.
- Isolation circuit protects control system from surge and common‑mode interference.
- Support signal abnormality detection for equipment fault diagnosis and alarm output.
- Modular rack‑mount structure supports quick replacement for on‑site overhaul work.
Application Scenarios
- Excitation cabinets for thermal power, hydropower and industrial co‑generation plants.
- Signal feedback units for synchronous generator automatic voltage regulation system.
- Retrofit and spare replacement of legacy ABB UNITROL power automation platforms.
- Preventive maintenance and fault repair projects for power‑generation control equipment.
- Spare parts inventory for power automation integrators and engineering contractors.
- Global aftermarket spare supply for technical teams maintaining ABB generator hardware.