Description
The ABB KUC321AE (order code HIEE300698R1 / HIEE300698R0001) is an integrated Power Supply and Subrack Controller Unit manufactured by ABB. It is widely utilized across ABB high-speed programmable logic control systems, including the PSR (Programmable High-Speed Controller) platform, UNITROL excitation systems, SYNCHROTACT automatic synchronizing units, and MEGATROL static frequency converter subracks.
The KUC321AE supplies regulated, low-noise DC power rails across the subrack backplane to power adjacent CPU, memory, and communication cards while performing real-time power monitoring and system supervisory functions.
Technical Specifications
| Parameter | Specification |
| Manufacturer | ABB (Asea Brown Boveri) |
| Model Designation | KUC321AE (KUC 321 AE) |
| ABB Order Code | HIEE300698R1 (HIEE300698R0001) |
| Module Type | Subrack Power Supply & Control Unit |
| System Compatibility | ABB PSR System, SYNCHROTACT, UNITROL, MEGATROL Subracks |
| Input Supply Voltage | 24V DC to 110V DC / 115V–230V AC (system dependent) |
| Output Voltages | Conditioned internal subrack DC rails (+5V DC, ±15V DC, +24V DC) |
| Cooling Method | Passive convection / Integrated subrack airflow chassis |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Form Factor | Plug-in Eurocard PCB Assembly with front panel retention screws |
Core Features & Operating Capabilities
- Multi-Rail DC Power Distribution: Converts raw station control voltage into tightly regulated, low-ripple DC voltages required by high-speed processor and memory modules on the subrack backplane.
- Onboard Power Supervisory Monitoring: Continuously monitors internal DC voltage levels, input supply health, and ambient thermal thresholds, immediately signaling diagnostic trips if power drops below safe operating limits.
- Overvoltage & Short-Circuit Protection: Features built-in electronic current limiting and thermal shutdown protection to safeguard critical processor boards against downstream short circuits.
- Hot-Swap & Redundant Chassis Support: Built for high-availability power plant and utility subracks, supporting parallel power redundancy configurations in critical turbine and generator control panels.
- Front Panel Diagnostic Indicators: Equipped with status LEDs to give field technicians immediate visual feedback regarding AC/DC input power integrity and internal DC rail health.
Related & Associated ABB Hardware
- KUC711AE (3BHB004661R0001) — High-Speed Processor / Controller Module.
- GFD233A (3BHE022294R0101) — Fast Discharge & Ground Fault Protection Module.
- PBA850 (3BHE022293R0101) — Power Electronics Subrack Backplane Assembly.
- SYNCHROTACT 4 / 5 — ABB Automatic Synchronizing & Paralleling System.
