Application Scenarios

In a 765 kV GIS substation in India, the station DC system is a 110 V battery bank with A and B feeders distributed to every relay cubicle. During a monsoon storm, a rat-chewed section of feeder A’s multicore caused a sustained earth fault that tripped the A-feed breaker at the distribution board. Inside the RED670 protecting the 765/400 kV autotransformer, the ABB 1MRK002239-BB​ silently took the hit: its A/B ORing architecture detected the A-feed collapse, increased conduction on the B-feed path within milliseconds, and kept the IED’s internal rails alive with zero interruption to the differential protection — the relay never even logged a “supply degraded” event because the transition was within the POWB’s hold-up window. Two days later, during a scheduled outage, the maintenance team opened the cubicle and noticed the A-feed indicator on the POWB’s silk-screen was dim — a clue that led them to find the damaged cable before feeder B developed a fault too. In a grid where a single transformer trip cascades into a state-level load-shed, the 1MRK002239-BB‘s dual-feed resilience turned a potential blackout into a footnote in the daily log.

Parameter

Main Parameters	Value/Description
Product Model​	1MRK002239-BB​
Manufacturer​	ABB (Grid Automation, Substation Automation)
Product Category​	Internal Power Board (POWB) – Station Supply Front-End
Host IED Platform​	RELION 670 Series (RED670, RET670, REC670, REM670)
Input Voltage Range​	18–370 V DC (covers 24 / 48 / 110 / 220 V DC station norms)
Dual Feed Support​	A/B station supply ORing with automatic prioritization
Protection Features​	Reverse polarity, inrush current limiting, overvoltage crowbar
Outputs​	Pre-conditioned DC to internal SMPS (1MRK000158) + direct rails to binary/trip sections
Mounting​	Internal to 670 chassis (guide-key + retention screw)
Connector​	Proprietary multi-pin backplane header (670 chassis matched)
Operating Temp​	-40 °C to +70 °C (relay internal)
Compliance​	IEC 60255, IEC 61850 (as part of host IED)
Configuration Impact​	None – passive board, plug-and-play replacement

 

Technical Principles and Innovative Values

• Innovation Point 1: Silent A/B Feed ORing.​ The 1MRK002239-BB​ doesn’t just present two terminals — it actively manages the transition between feeder A and feeder B using low-loss ORing elements (ideal-diode MOSFET or Schottky with active monitoring, revision-dependent). This means if one station-battery feeder develops a fault mid-storm, the 670 IED doesn’t even blink — no “supply fail” relay event, no watchdog trip. For P1/P2 redundant protection schemes, this is the difference between “scheme degraded” and “nobody noticed.”
• Innovation Point 2: Reverse-Polarity Survival.​ Substation retrofit crews have a long history of wiring 220 V DC into a 110 V-labeled terminal (or reversing +/- during a late-night changeover). The 1MRK002239-BB​ is specified to survive accidental reverse polarity on the station feed without frying the downstream SMPS or the relay’s CPU — a cheap insurance policy that pays for itself the first time a contractor gets sloppy.
• Innovation Point 3: Passive, Zero-Config Spare Philosophy.​ Like its siblings in the 1MRK family, the 1MRK002239-BB​ carries no firmware and no parameter store. Swapping it requires no PCM600 session, no application-version check, no “marry” step. Power down → unscrew → lift header → seat new board → screw → power up → self-test passes. Mean time to repair (MTTR) for a POWB fault: <15 minutes. This is why utilities stock the 1MRK PCBs instead of whole IEDs — the CAPEX spread is 10:1.

 

Application Cases and Industry Value

Case 1 – Offshore Wind HVDC Converter Station (North Sea):​ The platform’s 320 kV VSC converter uses RED670 for transformer differential on the platform-side step-up. The station DC is 220 V nominal, fed from the platform’s battery + a rectifier off the auxiliary diesel. During a diesel start sequence, the rectifier’s inrush caused a 40 ms dip on feeder A. The ABB 1MRK002239-BB​ inside each RED670 held the internal rails through the dip via its input capacitance and ORing to feeder B, which was riding the battery. No protection blinks, no nuisance trips during a sensitive black-start window. The O&M lead later said the only way they knew the dip happened was the SCADA event from the rectifier — the relays stayed silent.Case 2 – Utility Depot Spare-Hold Strategy (Southeast Asia):​ A national TSO standardised on the “670 Power Chain Kit” — containing 1MRK002239-BB​ (POWB), 1MRK000158-… (SMPS), and 1MRK000157-VBR00 (bias reg) — as a single pick-list item for every 670-series relay in the fleet. Before this, they’d order a whole relay (~€8 k, 10-week lead) for any internal power fault. After switching to PCB-level sparing, the depot holding value dropped by ~68 % and MTTR on “relay won’t power up” tickets went from “week+” to “next truck roll.” The 1MRK002239-BB​ is the highest-leverage SKU in that kit because POWB failures correlate with station-DC transients (lightning, feeder faults, battery maintenance), which are the most common external-event triggers.

Related Product Combination Solutions

The ABB 1MRK002239-BB​ sits at the head of the 670 internal power chain — here’s the usual companion set:

• ABB 1MRK000158-… (SMPS Board)​ – The DC/DC conversion stage that the 1MRK002239-BB​ feeds; together they form the complete station→IED power path.
• ABB 1MRK000157-VBR00​ – Voltage Bias Regulator (from your previous query); sits downstream of SMPS, buffered by POWB indirectly.
• ABB 1MRK000173-… / 1MRK000284-AB​ – Binary input boards that draw trip-coil-grade supply from the POWB’s direct rail (not through SMPS) for fast trip-path independence.
• ABB RED670 / RET670 / REC670 / REM670​ – The host 670-series IED chassis that accepts the 1MRK002239-BB.
• ABB PCM600​ – Engineering tool for post-swap “Go/No-Go” check (though POWB itself needs no download, a quick IED self-test verification is standard).
• ABB 1MRK002240-…​ – Sometimes the sibling “Power Board Rev CC/BA” — check white-label suffix; BB is a mid-life revision, later units may ship CD/CA. We can cross-check your existing board’s sticker.
• ABB RELION 650-series POWB (1MRK0022xx variant)​ – If your fleet mixes 650 and 670, the POWB part numbers differ — don’t cross-pick.