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 years of continuous write cycles. During a planned outage, the front cover is opened, the old ABB 1MRK000179-CCR00 is carefully unplugged from its slot, and a new board is installed in its place. On power-up, the relay’s self-diagnostic passes, the memory-status indicator confirms healthy operation, and the next staged fault test produces a complete COMTRADE waveform file stored locally. The key pain point solved: a board-level swap restores full disturbance-recording and event-logging capability without replacing the expensive IED main unit, preserving existing CT/VT wiring, settings files, and protection logic—getting the substation back to compliance in minutes.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | ABB 1MRK000179-CCR00 (Alt: 1MRK000179-CCr00) |
| Manufacturer | ABB (Sweden / Switzerland) |
| Product Category | Internal Memory Expansion / Data Storage Board |
| Compatible Platforms | ABB RELION® Series – REF620, REJ620, RET620, RED670 (select versions); 1MRK rack/controller hosts |
| Memory Capacity | 256 MB SDRAM + associated non-volatile storage area for configuration and event log retention |
| Supply Voltage | 24 V DC (derived from host backplane / internal bus) |
| Power Consumption | ≤ 5 W (typical) |
| Interface / Bus | Proprietary ABB 1MRK internal board-to-board / edge connector (keyed for correct orientation) |
| Operating Temperature | -25°C to +70°C (storage: -40°C to +85°C) |
| Dimensions (Reference) | Approx. 84 × 95 × 28.5 mm (L × W × H) |
| Mounting Type | Internal slot / screw-fixed to PCB standoffs inside relay housing |
| Data Transfer Rate | Up to 12 MB/s |
Technical Principles and Innovative Values
Innovation Point 1: Substation-Grade EMI-Hardened Memory Architecture
Unlike commercial SDRAM modules, the ABB 1MRK000179-CCR00 is designed with board-level shielding and filtered power approaches 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 in high-voltage environments.
Innovation Point 2: Dual-Purpose Volatile + Non-Volatile Partitioning
The ABB 1MRK000179-CCR00 dedicates fast SDRAM for real-time buffering of high-sample-rate fault waveforms (up to several cycles pre-fault/post-fault), while Flash or battery-backed SRAM permanently stores event summaries, setting files, and oscillography headers. This architecture allows the relay to retain critical forensic data even if the main CPU reboots—data is committed to non-volatile space before the CPU resets.
Innovation Point 3: Drop-In Replacement with Auto-Detection
When inserted into a compatible RELION IED, the ABB 1MRK000179-CCR00 is auto-detected by the firmware—no DIP switches or manual addressing required. A failed memory board can be swapped in under 10 minutes with zero impact on the rest of the IED’s hardware, dramatically lowering Mean Time To Repair (MTTR) compared with full-unit replacement.
Innovation Point 4: Industrial-Specific Power Architecture
Operating on 24 V DC rather than the 5V/12V used by consumer memory, the ABB 1MRK000179-CCR00 is fully compatible with industrial control cabinet power standards. Its wide temperature tolerance (-25°C to +70°C) ensures consistent performance in unheated substations and outdoor switchyards.
Application Cases and Industry Value
Case Study: Transmission Substation Memory Failure Recovery
A 220 kV transmission substation experienced an intermittent “Memory Check Fail” alarm on its REF620 line protection relay after 18 years of continuous service. The relay’s disturbance recording function had become unreliable, and the utility’s protection engineer feared losing critical fault data during the next system event. During a scheduled maintenance window, the team replaced the aging ABB 1MRK000179-CCR00 with a verified replacement. Post-replacement testing confirmed full restoration of fault waveform capture and event logging. The utility avoided replacing the entire REF620 unit, saving approximately $12,000 in equipment costs and preserving the existing protection settings and CT/VT wiring. The relay has since operated for 24 months with no memory-related issues.
Industry Value Impact
The ABB 1MRK000179-CCR00 delivers critical value across three dimensions: First, it ensures protection system reliability by maintaining accurate fault recording for post-event analysis. Second, it dramatically reduces maintenance costs by enabling board-level replacement rather than entire IED substitution. Third, it provides operational continuity by allowing rapid restoration of relay functionality during planned or emergency maintenance windows.
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