ABB 1MRK000157-MBr00 Power Supply Board – Obsolete REB500 Spare Part

Technical Dossier

Product Details And Specifications

ABB 1MRK000157-MBr00 Power Supply Board – Obsolete REB500 Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters such as input voltage range and output rail specifications are confirmed upon request with unit inspection report. No parameters are published without verified documentation.

Solving the Discontinued Hardware Crisis

The ABB REB500 busbar protection system was deployed extensively across European and Asian utility networks from the 1990s through the 2010s. Its centralized busbar protection architecture — with dedicated bay units and a central unit — remains in active service at hundreds of substations where full replacement is not financially or operationally viable within a 5–10 year planning horizon.

The 1MRK000157-MBr00 power supply board is an internal module with no cross-manufacturer substitute. ABB's own replacement path requires full REB500 system decommissioning and migration to REB670 or REB500 Gen2, a process that demands protection engineers, utility approval, and extended outage windows. For plant and substation managers operating under capital expenditure constraints, sourcing a verified spare 1MRK000157-MBr00 is the only strategy that preserves system continuity without triggering a multi-year upgrade program.

Condition & Reliability Assurance

DriveKNMS applies a 5-step QA protocol to all obsolete power supply boards before dispatch:

• Step 1 – Electrolytic Capacitor Inspection: All electrolytic capacitors are tested for ESR (Equivalent Series Resistance) and capacitance drift. Units with capacitors showing >20% capacitance loss or elevated ESR are either recapped or rejected.
• Step 2 – Firmware & Configuration Verification: Where applicable, firmware version is read and documented. For the 1MRK000157-MBr00, internal configuration states are verified against known REB500 compatibility matrices.
• Step 3 – Pin and Connector Corrosion Audit: All edge connectors and board-to-board pins are inspected under magnification. Oxidized contacts are treated; units with structural corrosion are rejected from inventory.
• Step 4 – Functional Power-On Test: The board is powered within a controlled bench environment. Output rail stability and ripple are measured and recorded.
• Step 5 – Documentation Package: Each unit ships with a condition report, inspection checklist, and photographic record of the physical state.

Key Features for System Maintenance

• Drop-in replacement: The 1MRK000157-MBr00 installs directly into the existing REB500 chassis without mechanical modification.
• No reprogramming required: The power supply board carries no site-specific configuration. Replacement does not require protection engineer involvement for the board swap itself.
• Avoids engineering reconstruction costs: Sourcing this spare eliminates the need to initiate a protection scheme redesign, secondary wiring audit, or utility re-approval process — costs that routinely exceed the value of the original system installation.
• Extends asset life 5–10 years: A single verified spare board can sustain REB500 operation through the end of a typical substation asset lifecycle, deferring capital expenditure on full system replacement.