ABB 1MRK000167-GBR00 GBR Circuit Board – Protection Relay Internal PCB, 24–250 V DC

Technical Specifications

(Note: Exact electrical values — supply voltage range, relay contact ratings, backplane pinout — should be cross-checked against the specific relay / GCB cubicle BOM that calls up 1MRK000167-GBR00, as 1MRK spares span multiple host platforms.)

Main Features and Advantages

Breaker-health visibility.​ The primary design intent of the ABB 1MRK000167-GBR00​ is making the generator breaker or MV breaker “transparent” to the protection relay. By continuously supervising trip/close coil continuity and reading 52a/52b and spring-charged contacts, the board ensures that a broken trip-coil lead or a disengaged spring-charge motor doesn’t stay hidden until the moment a fault demands breaker operation. That visibility flows from the ABB 1MRK000167-GBR00​ through the relay mainboard to the 800xA/SCADA alarm stack — turning a latent defect into a logged alarm.Relay-integrated form factor.​ Rather than a DIN-rail gadget, the ABB 1MRK000167-GBR00​ is shaped and pinned for the host relay’s or control-unit’s internal backplane. The station-battery feed, the auxiliary contact inputs, and the supervision outputs all land on the same compact PCB that seats onto the 1MRK backplane. For protection technicians, replacement is “unlatch — withdraw — seat new — re-latch,” with no rewiring of the 52a/52b or coil-supervision circuits (those terminate on the terminal-block / TB layer above, not on the PCB itself).Broad host-platform compatibility.​ Although the “GBR” mnemonic points strongest toward generator-breaker applications (RET670/RED670 + GCB panels in power plants), the ABB 1MRK000167-GBR00​ also appears in MV breaker control contexts (VD4 cubicles, VMAX, retrofitted SPACOM relays) where a breaker-interface PCB of this footprint is called up. That cross-platform relevance means the spare pools well for utilities and IPPs that run mixed ABB protection fleets — one SKU covers multiple panel types, provided the BOM match is verified.Industrial ruggedness.​ Conformal coating, wide station-battery tolerance (24–250 V DC spanning the common DC-system voltages), and a mechanical envelope that lives inside a protected relay cubicle mean the ABB 1MRK000167-GBR00​ survives the EMI, battery-room thermal swing, and vibration profile of switchyards, power-plant electrical buildings, and heavy-industrial substations. For fleets with 20–50 ABB protection relays or GCB cubicles, carrying 2–3 ABB 1MRK000167-GBR00​ spares across the site is trivial inventory cost against the risk of a “trip-circuit fail” alarm storm during a unit synchronization window.Diagnosability.​ Because the ABB 1MRK000167-GBR00​ reports upward to the relay processor, most faults traceable to this board surface as specific alarm codes (“TC Fail,” “CC Fail,” “Spring Fail,” “52 Mismatch”) rather than a generic “relay fault.” That specificity lets protection engineers distinguish a bad PCB from a bad trip-coil, a bad 52a contact, or a blown supervision fuse — a differentiation that saves hours of patrol time during outage windows.