Key Technical Specifications
- Product Model: HIEE300690R0001
- Manufacturer: ABB
- System Platform: ABB UNITROL Static Excitation System
- Module Function: Excitation control signal interface and conditioning
- Input Signal Types: Analog control and feedback signals (±10 V, 4–20 mA system-dependent)
- Output Signal Types: Conditioned analog and logic-level control signals
- Signal Resolution: 12-bit effective resolution (system dependent)
- Electrical Isolation: Galvanic isolation between control and power sections
- Isolation Voltage Rating: ≥1500 V AC
- Response Time: <5 ms signal propagation delay
- Power Supply Requirement: +24 V DC supplied from UNITROL system
- Power Consumption: <10 W
- Operating Temperature: 0 to +55 °C
- Storage Temperature: −25 to +70 °C
- Mounting Type: Plug-in PCB module for excitation control rack
- Certifications & Compliance: CE compliant, IEC 60034, IEC 61131-2 industrial standards
Technical Architecture & Functional Positioning
Architecture Analysis
The HIEE300690R0001 module is positioned within the control and interface layer of the ABB UNITROL static excitation system. Its primary role is to act as an intermediary between the automatic voltage regulator (AVR), protection logic, and the power electronics responsible for field excitation. Unlike power conversion modules, this board focuses on accurate signal conditioning, isolation, and distribution—functions that are critical for stable generator voltage control.
From an architectural standpoint, the module employs galvanically isolated analog signal paths combined with precision scaling and filtering circuits. This design protects sensitive control electronics from high-energy transients commonly present in generator excitation environments, particularly during load rejection, synchronization, or fault conditions. Isolation also prevents ground loops between measurement circuits and power electronics, a common cause of instability in large generator systems.
The engineering value of this design is reflected in improved voltage regulation accuracy and system robustness. By ensuring that feedback signals from voltage transformers and current sensors are accurately conditioned before being processed by the AVR, the module enables fast and stable control responses. This is especially important in power generation applications where voltage deviations can affect grid stability, generator thermal stress, and protection coordination.
Typical Application Scenarios
- Applied in hydroelectric and thermal power plants for synchronous generator excitation control
- Used in industrial captive power systems requiring precise AVR and reactive power regulation
- Serves as an OEM-compatible replacement for legacy UNITROL excitation systems
- Supports excitation system refurbishment and life-extension projects
- Utilized in generator test benches and commissioning platforms for excitation tuning
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