Description
Manufacturer: ABB
Part Number: UA C317 AE, HIEE300725R0001
Product Type: Measuring Interface Board (Measurement & Analog Acquisition Card for UNITROL Excitation System)
Product Overview
The UA C317 AE (HIEE300725R0001) is a high precision measuring interface board used within ABB UNITROL series generator excitation control systems. It samples and converts AC voltage, AC current and analog field signals from PT/CT transducers, converts raw analog measurements into digital data for the main excitation controller. It is a critical signal acquisition spare for large synchronous generator excitation cabinets in power plants, responsible for real-time measurement of stator voltage, stator current and field winding parameters for voltage regulation and protection logic.
Technical Specifications
| Parameter | Value |
|---|---|
| Compatibility | ABB UNITROL 5000 Excitation System |
| Input Signals | AC voltage / AC current from PT & CT, analog process signals |
| Onboard Function | High-speed analog to digital conversion, signal filtering, galvanic isolation |
| Auxiliary Power | 24 V DC |
| Frequency | 50 / 60 Hz power system frequency |
| Mounting | Rack mount inside UNITROL excitation cubicle |
| Operating Temperature | -40 °C ~ +70 °C |
| Storage Temperature | -40 °C ~ +85 °C |
| Relative Humidity | Up to 95% RH, non-condensing |
| Country of Origin | Sweden |
| Status Indicators | LED indicators for power, run, fault and channel diagnostics |
Key Features
- High accuracy multi-channel AC signal measurement for generator voltage and current sampling.
- Galvanic isolation between field PT/CT secondary circuits and control electronics, protecting the excitation controller.
- On-board anti-aliasing filtering to suppress high-frequency noise and transient interference.
- Real-time digitized measurement data sent to the main UNITROL controller for AVR regulation and limit protection functions.
- Comprehensive built-in self-diagnostics for channel failure, signal loss and hardware fault detection.
- Standard form factor, direct drop-in replacement for UNITROL excitation rack spare maintenance.
Application Scenarios
- Thermal power plant generator UNITROL excitation cabinets
- Hydroelectric generator excitation control systems
- Combined-cycle power plant synchronous generator AVR control
- Large industrial captive power plant generator excitation systems
Installation & Maintenance Notes
- De-energize all PT, CT and 24V auxiliary supply before removing the board; CT secondary circuits must never be opened.
- Apply ESD protection during PCB handling to avoid static damage to sensitive ADC circuits.
- Verify CT and PT polarity strictly before commissioning, incorrect polarity causes wrong measurement and AVR malfunction.
- Check all terminal connections for tightness and signs of overheating during scheduled outages.
- After replacement, perform measurement calibration and verify voltage/current readings match reference values.
- Confirm part number and firmware revision compatibility with the existing UNITROL controller before spare ordering.
FAQ
Q: What system does UA C317 AE HIEE300725R0001 belong to? A: It is the measurement interface board for ABB UNITROL 5000 generator excitation systems.
Q: What is the main function of this board? A: It samples generator PT/CT analog signals, performs ADC conversion and feeds digital measurement data to the AVR controller for excitation regulation.
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