Application Scenarios
At a hydroelectric station in northern Europe, two UNITROL 5000 exciters had operated reliably for more than 18 years. During winter commissioning after an outage, the plant recorded small but repeatable voltage disturbances immediately after the units were restarted from cold. The Power System Stabilizer (PSS) occasionally appeared to hang, and the grid operator began questioning the station’s reactive-power response during early-morning ramps.
Investigation traced the behaviour to the DSP interrupt timing in the original UNS2880B-P V1 boards: at low temperature, an interrupt race condition caused sporadic hangs and voltage jitter. The station replaced the boards with the ABB 3BHE014967R0002 (V2) units. Because the V2 revision is fully pin-compatible with V1, the swap required no mechanical or wiring changes; after the excitation configuration parameters were re-downloaded, cold-start testing ran without a single PSS anomaly. Over the following winter the plant recorded stable voltage and reactive-power response across every cold start, and the grid-operator concern was closed.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 3BHE014967R0002 |
| Type Designation | UNS2880B-P, V2 (UNS 2880B-P,V2) |
| Full Description | UNS2880B-P,V2: COB PCB Assembled |
| Manufacturer | ABB |
| Manufacturing Origin | Switzerland (CH) |
| Product Category | COB control and interface board |
| Primary System | ABB UNITROL 5000 excitation system |
| Compatible Systems | ABB ACS5000 and ACS6000 medium-voltage high-power converters |
| Supersedes | UNS2880B-P V1 (3BHE014967R0001) |
| Pin Compatibility | Fully pin-compatible with V1; direct replacement |
| Packaging | Chip-on-Board (COB), components directly mounted and encapsulated on PCB |
| Delivery State | Fully assembled PCB — no loose components to fit |
| Country of Stocking | Switzerland (Baden) |
| Customs Tariff Number | 85371092 |
| Lifecycle Status | Discontinued / obsolete at OEM level; available as new surplus, refurbished or tested take-out |
Technical Principles and Innovative Values
Innovation Point 1 — Chip-on-Board construction for a denser, more robust control assembly. The 3BHE014967R0002 mounts its processor and support circuitry directly onto the PCB and encapsulates them in COB compound. Compared with conventional socketed devices, this shortens interconnect paths, improves resistance to vibration and thermal cycling, and protects the die from contamination—important in the dusty, temperature-variable environments of hydro and thermal exciter cubicles.
Innovation Point 2 — A reliability revision rather than a feature revision. The V2 designation is not marketing: ABB’s own comparison states that V2 is a minor hardware revision plus a firmware upgrade. It retains all original functionality while specifically correcting the timing defect found in V1, making it a dependable upgrade rather than an incompatible redesign.
Innovation Point 3 — The documented fix for a hard-to-reproduce cold-start failure. V1 contained a race condition in the DSP interrupt timing that surfaced during low-temperature cold starts and caused intermittent PSS hangs and voltage jitter. The 3BHE014967R0002 resolves this defect, directly addressing the root cause of faults that were otherwise expensive to diagnose.
Innovation Point 4 — Drop-in replacement with no mechanical re-engineering. Because the 3BHE014967R0002 is fully pin-compatible with the V1 board, it fits the existing location and connector arrangement without modification. The only post-replacement requirement is to download the excitation configuration parameters again—no cabinet rewiring, no backplane changes.
Innovation Point 5 — A single board spanning excitation and high-power conversion. The UNS2880B-P family serves both UNITROL 5000 excitation and ACS5000/ACS6000 high-power converters. For sites operating both technologies, this commonality simplifies spare-parts holding and cross-training.
