Product Core Summary
- Model: HIEE305098R0001 UNS0007A-P V1
- Manufacturer: ABB
- Core Function: Generates precise firing pulses for thyristors in the power converter bridge, ensuring controlled DC excitation current delivery to synchronous generators.
- System Compatibility: Compatible with ABB UNITROL P and UNITROL 1000/1020 series static excitation systems.
- Supply Status: Obsolete spare part, sourced from verified global inventory with immediate availability options.
- Warranty Standard: 12-month functional warranty, fully tested.
Key Technical Specifications
- Product Model: HIEE305098R0001 UNS0007A-P V1
- Manufacturer: ABB
- System Platform: UNITROL P Excitation System
- Blocking Voltage Rating: 1400 V peak, suitable for medium-voltage thyristor bridges in excitation converters.
- Pulse Output: Six independent channels for anti-parallel thyristor pairs, with optically isolated triggers.
- Firing Angle Range: 0° to 180° electrical, supporting inverter operation up to 150° for field forcing.
- Power Supply: 24 V DC auxiliary supply, with wide tolerance for industrial fluctuations.
- Operating Temperature Range: -20 °C to +70 °C, extended for cabinet-mounted applications.
- Communication Interface: Fiber-optic links to controller for noise-immune pulse transmission and diagnostics.
- Isolation: Galvanic isolation between control and power sections exceeding 2500 V AC.
- Dimensions: Approximately 245 mm (D) x 142 mm (H) x 190 mm (W).
- Weight: 0.51 kg.
- Certifications: CE marked, compliant with IEC 61010 safety standards and EMC directives for power electronics.
- MTBF: Designed for high reliability exceeding 500,000 hours in continuous excitation duty.
- Environmental Protection: Conformal coating for resistance to humidity and contamination in power plant environments.
Technical Architecture & Functional Positioning
The HIEE305098R0001 UNS0007A-P V1 occupies a critical position in the power layer of the UNITROL P excitation architecture, directly interfacing between the digital controller and the thyristor bridge rectifier. This module translates low-level control signals into high-integrity firing pulses, synchronizing with the AC supply to regulate the conduction angle of each thyristor leg. Its design incorporates pulse transformers and optical coupling to maintain precise timing even under severe electrical noise from the converter commutation process.
Key technologies include phase-locked loop synchronization for accurate alpha angle control and burst firing modes for de-excitation or field flashing. These features enable rapid response to grid disturbances, providing field forcing up to 160% ceiling current to support transient stability. The board’s redundancy-friendly layout allows parallel operation in dual-channel systems, facilitating bumpless transfer and online maintenance—essential for avoiding generator trips that could cascade into grid faults.
In engineering terms, this firing unit addresses challenges like thyristor misfiring due to dv/dt stress or EMI, which can lead to excitation loss and rotor slip. By employing robust isolation and snubber integration support, it enhances converter reliability, reduces harmonic distortion in the field winding, and extends thyristor lifespan in demanding cycles such as pump-storage or base-load generation.
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