Description:
The ABB 1MRK000179-CCR00 (also styled 1MRK000179-CCr00) is a dedicated internal Memory Expansion Module / circuit board used in ABB RELION®-series protection relays and substation control units such as REF620, REJ620, RET620, and compatible 1MRK hardware platforms. It provides 256 MB of SDRAM (with associated non-volatile storage area) to buffer disturbance records, sequential event logs (SER), oscillographic fault waveforms, and to retain downloaded configuration parameters. Powered from the host device’s 24 V DC backplane or internal supply, it is a plug-in / screw-mounted PCB assembly—not a generic DIMM—engineered specifically for the harsh EMI environment of high-voltage substations.
Application Scenarios:
Picture a 132 kV substation where the ABB REF620 feeder protection relay suddenly logs a “Memory Error” and stops capturing disturbance records after a heavy fault. The protection engineer suspects the internal memory board has reached end-of-life after 18 years of continuous write cycles. During a planned outage, the front cover is opened, the old 1MRK000179-CCR00 is carefully unplugged from its slot / standoff mount, and a new genuine board is installed in its place. On power-up, the relay’s self-diagnostic passes, the memory-status LED (or software indicator) confirms healthy operation, and the next staged fault test produces a complete COMTRADE waveform file stored locally on the 1MRK000179-CCR00. The key pain point solved: a board-level swap that restores full disturbance-recording and event-logging capability without replacing the expensive IED main unit, preserving the existing CT/VT wiring, settings file, and protection logic—getting the substation back to NERC / IEC 61850 compliance in minutes.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1MRK000179-CCR00 (Alt: 1MRK000179-CCr00 / CCR00 Series) |
| Manufacturer | ABB (Sweden / Switzerland) |
| Product Category | Internal Memory Expansion Module / Data Storage Circuit Board for Protection IEDs |
| Compatible Platforms | ABB RELION® Series – REF620, REJ620, RET620, RED670 (select versions); 1MRK rack/controller hosts |
| Memory Capacity | 256 MB SDRAM + associated NV storage area for config/log retention |
| Supply Voltage | 24 V DC (derived from host backplane / internal bus; typical draw ≤ 5 W) |
| Data Retention | Non-volatile storage of config & event logs survives power loss (battery-backed or Flash-backed per design rev.) |
| Interface / Bus | Proprietary ABB 1MRK internal board-to-board / edge connector (keyed for correct orientation) |
| Indicators | Memory Status / Health LED (where fitted; also readable via relay HMI / PCM600) |
| Operating Temp. | -25 °C to +70 °C (storage: -40 °C to +85 °C); 5–95 % RH non-condensing |
| Mounting | Internal slot / screw-fixed to PCB standoffs inside relay / control unit housing |
| Dimensions (Ref.) | Approx. 84 × 95 × 28.5 mm (L × W × H) – varies slightly by revision |
| Certifications | CE, IEC 60255 (as component of host relay system), RoHS |
Technical Principles and Innovative Values:
The 1MRK000179-CCR00 is a purpose-engineered memory subsystem, not a commodity PC memory stick. It is qualified to operate in the high EMI/Earth-fault environment of MV/HV switchyards.
- Innovation Point 1: Substation-Grade EMI-Hardened Memory Architecture. Unlike commercial SDRAM modules, the 1MRK000179-CCR00 is conformal-coated (on most revisions) and uses a board-level shielding / filtered power approach to resist inductive transients from disconnector switching and lightning strikes. This ensures disturbance records are not corrupted by electromagnetic noise at the very moment a fault is being captured—a make-or-break requirement for post-event analysis.
- Innovation Point 2: Dual-Purpose Volatile + Non-Volatile Partitioning for Real-Time Protection. The 1MRK000179-CCR00 dedicates fast SDRAM for real-time buffering of high-sample-rate fault waveforms (up to several cycles pre-fault / post-fault), while a Flash or battery-backed SRAM area permanently stores the most recent event summaries, setting files, and oscillography headers. This architecture allows the relay to retain critical forensic data even if the disturbance is so severe the main CPU reboots—data is committed to non-volatile space before the CPU resets.
- Innovation Point 3: Form-Fit Drop-In Replacement with Auto-Detection. When inserted into a compatible RELION IED, the 1MRK000179-CCR00 is auto-detected by the firmware; no DIP switches or manual addressing. After a fresh install the engineer loads the relay’s setting file and disturbance-record depth configuration—the board immediately becomes active. For maintenance teams this means a failed memory board can be swapped in under 10 minutes with zero impact on the rest of the IED’s hardware, dramatically lowering MTTR compared with full-unit replacement.
