ABB 1MRK002239-BB Power Supply Module – PSM for Relion REF615 / REL670 / RET670 IEDs, 24V DC 2.5–5A

Technical Specifications

Main Features and Advantages

Wide-input that swallows station-service variance: The ABB 1MRK002239-BB​ takes 85–264 V AC and 90–250 V DC on the r01–r03 builds, widened to 24–250 V AC/DC on r04. That span covers global substation norms — 120 V AC/DC (North America), 230 V AC (Europe), 110/220 V DC station battery (utility standard) — so one spare SKU serves both sides of a multinational fleet. For plants that run both 110 V DC and 220 V DC station batteries across different yards, the 1MRK002239-BB​ r04 especially is the “one PSU for both” answer.Revision-aware sourcing (the single most important buyer note): The BB base code alone is not a complete substitution key. BBr01 is the early build, BBr02 added EMI filtering, BBr03 is the mainstream IEC 61850-compatible build with redundant-parallel support, and BBr04 is the latest with expanded 24–250 V input, 5 A / 120 W output, -40°C rating, and improved thermal/capacitor life. ABB’s compatibility stance: r03 can generally replace r01/r02 upward, but r01 in a new IED may fail EMC or draw a firmware compatibility warning; r04 into an old cubicle usually works but verify the 5 A loading doesn’t overshoot the old backplane’s fuse. When you order ABB 1MRK002239-BB, the suffix must match the old board’s label unless you’ve cleared the r0x jump with ABB’s compatibility matrix — this is the #1 misorder on the SKU.Multi-rail vs. 24 V-only: Some BBr01 builds are sold as “system power module” with +5 V / +12 V / +24 V multi-rail feeding a Relion 670 backplane (CPU + I/O + comms all from one PSU), while the r03/r04 mainstream builds are 24 V-only feeding IED-local loads or paired with a separate multi-rail stage. Know which your cubicle expects before swapping — a 24 V-only r04 into a multi-rail-backplane cubicle will boot the IED CPU (which often runs on 24 V anyway) but may leave the comms coprocessor or binary-I/O backplane unhappy if they expected +5/+12 from the PSU. The ABB 1MRK002239-BB​ label on the cubicle door’s spare-parts list should state “multi-rail” or “24V-only” — if it doesn’t, photograph the old board’s silkscreen.3 kV isolation + EMI hardening for the switchyard: Substation cubicles sit next to 110 kV–400 kV switchgear, VCB switching, CT/VT secondaries, and protection relay trip circuits — all noisy. The 1MRK002239-BB​ carries ≥3 kV AC input-output isolation and (on r02+) enhanced EMI filtering per IEC 61000-4, which keeps VCB-switching transients from jittering the 24 V rail that the REF615 CPU rides. For digital-substation IEC 61850 builds (r03+), the PSU’s clean rail matters even more because the process bus and station bus ethernet coprocessors are 24 V loads and sensitive to ripple during GOOSE storm events.Mounting flexibility: The ABB 1MRK002239-BB​ ships in two mechanical flavors depending on host — DIN-rail clip (35 mm) for loose-mount in protection marshalling panels and RTU560 cabinets, and插卡式 (edge-connector card) for Relion 670-series IED chassis slots where the PSU slides into the same backplane as the CPU and I/O cards. That dual-mechanical means the same 1MRK002239-BB​ BOM line covers both “IED internal PSU” and “panel-mounted auxiliary PSU” roles across the same plant — simplifying MRO.Efficiency and thermal: At >85% (r01–r03) to 92% (r04), the ABB 1MRK002239-BB​ doesn’t cook the cubicle. In a packed 10 kV protection line-up where summer ambient in the switchroom touches 45°C, the difference between 80% and 92% efficiency is 10–15 W less dissipated into an already-warm cabinet. The r04 specifically tuned capacitor selection and heatsinking for this — MTBF improvement is the selling point ABB calls out.

Application Field

The ABB 1MRK002239-BB​ deploys wherever ABB Relion-series protection IEDs are specified — which is to say, most 110 kV–400 kV substations built or retrorofitted in the last 15–20 years, plus industrial power systems (cement plant 6 kV switchgear, refinery MV lineup, mining substation, steel-mill EAF protection) where ABB got the relay spec. The canonical installs:

• Transmission & distribution substations​ — one ABB 1MRK002239-BB​ per REF615 / REL670 / RET670 / REC670 / RED670 bay cubicle. In a 220 kV yard with 12 bays, that’s 12 PSU boards across the line-and-transformer protections. When a bay goes “IED dark” during a storm and the station 110 V DC battery checks out fine, the 1MRK002239-BB​ is the first pull-and-swap.
• Digital substations (IEC 61850)​ — r03/r04 builds specifically, where the PSU feeds not just the protection CPU but the process-bus/station-bus ethernet coprocessors; r03’s redundant-parallel capability lets two PSUs share a backplane for N+1 on critical bays.
• RTU560 and plant-auxiliary panels​ — the 1MRK family spans into ABB’s RTU560 remote-terminal units for grid SCADA; the ABB 1MRK002239-BB​ appears there as the panel-mounted 24 V auxiliary PSU, DIN-rail mounted beside the RTU CPU.
• Retrofit projects​ — plants running 20-year-old ABB protection with original PSUs whose electrolytics have drifted (output ripple climbing, occasional “IED reboot during VCB close” events) swap to 1MRK002239-BB​ r03 or r04 as the drop-in modern equivalent with better MTBF. The r04 especially is positioned as “retrofit-forward” — same footprint, better thermal, wider input.

For MRO, the failure modes are predictable: electrolytic cap aging (10–15 year timeframe, faster in hot switchrooms) manifests as rising ripple, intermittent IED reboots during switching events, or eventually full “panel dark” when the primary cap shorts. The ABB 1MRK002239-BB​ is therefore a “one-per-bay” proactive spare — 12 bays = 12 on the shelf, plus 1–2 float. Since ABB keeps the BB base code alive across r0x revisions but allocation can tighten regionally when a utility does a fleet retrofit, proactive buy beats emergency air-freight — especially because a “bay protection dark” ticket during storm season is a “get in the truck at 2 AM” event.Pairing note with the prior entry: in a Relion 670 cubicle the 1MRK002239-BB​ (PSU) feeds the 1MRK000173-CCR00​ (binary I/O) and the REL670 CPU — three 1MRK-family boards in one chassis, all from the same spare-pool taxonomy. That’s why the MRO storeroom often groups 1MRK00xxxx SKUs together.