Description

• Model: ABB RED670 Line Differential Protection Relay (Part Number: 1MRK002810-AB)
• Brand: ABB (Sweden)
• Series: Relion 670 Series (High-End Protection and Control IED Platform)
• Core Function: High-speed phase-segregated line differential protection, distance protection, and fault recorder for high-voltage transmission lines
• Product Type: Intelligent Electronic Device (IED) / Numerical Protection Relay
• Key Specs: 110/220 V DC Auxiliary Power | Optical Fiber Inter-Relay Communication | IEC 61850 Station Bus | Binary I/O expansion slots
• Supply Status: ✅ In Stock (Tested Pre-Owned / New Surplus available)
• Stock Quantity: Available for immediate dispatch
• Warranty: 12 Months (From shipment date)
• Ship From: Shenzhen / Hong Kong / Global Logistics Hubs

Key Technical Specifications

• Auxiliary Power Supply (Rated Voltage): 48 V to 250 V DC (±20% tolerance range)
• Current Transformer (CT) Inputs: Rated 1 A / 5 A programmable dual-rated inputs for phase differential protection
• Voltage Transformer (VT) Inputs: 100 V to 120 V AC phase-to-phase for backup distance and directional elements
• Communication Interfaces: Dual optical Ethernet ports (IEC 61850-8-1, Modbus, DNP3, and IEC 60870-5-103) plus dedicated fiber-optic channels for inter-relay differential signaling
• Operating Temperature Range: -25 °C to +55 °C (ambient switchgear environment)
• Storage Temperature Range: -40 °C to +70 °C
• Enclosure Protection Class: IP54 front panel / IP20 terminal block rear
• Mounting Configuration: 19-inch rack subrack mounting or flush panel mount (6U height, 3/4 rack width)
• Binary Inputs / Outputs: Configurable modular I/O card slots (typically equipped with multiple trip-rated output contacts and supervised optical binary inputs)
• Hardware Reference Identifiers: MPN 1MRK002810-AB, Relion 670 platform architecture

Application Scenarios & Pain Points

In high-voltage (HV) and extra-high-voltage (EHV) overhead power grids, transmission line faults must be cleared in milliseconds to prevent system instability, generator tripping, and catastrophic transformer damage. The ABB RED670 1MRK002810-AB provides master phase-segregated current differential protection across long-distance fiber-optic channels, ensuring absolute selectivity even under severe current transformer saturation or capacitive charging current conditions.
When a legacy protection IED suffers an internal power supply failure or communication board fault during routine substation testing, utility engineers face immense pressure. Waiting 8 to 12 weeks for a factory-configured replacement relay from ABB is unacceptable when a transmission line is left unprotected or running with restricted redundancy.

Typical Application Scenarios:

1. High-Voltage Transmission Line Protection Provides primary ultra-fast phase differential and backup distance protection for overhead lines and underground cables operating at 110 kV to 500 kV.
2. Multi-Terminal Transmission Lines Manages complex three-terminal or four-terminal line configurations with vector group compensation and channel delay automatic correction.
3. Substation Automation & IEC 61850 Bus Integration Acts as an intelligent bay controller communicating GOOSE messaging directly with circuit breaker merging units and station SCADA systems.
4. Industrial Power Grid Interties Safeguards heavy industrial plant incoming utility tie lines against phase-to-phase and ground faults.

Real-World Field Case: Emergency Relay Replacement at a 220 kV Substation

Background: During a severe lightning storm, a heavy transient surge bypassed a substation surge arrester and fried the internal power supply module and communication processor of a primary ABB RED670 line differential relay (1MRK002810-AB) protecting a critical 220 kV tie line.
Problem: Because line differential protection requires paired relays at both ends of the transmission corridor, running the line without active differential feedback forced the grid operator to downgrade the transmission tie to backup zone protection, elevating tripping risks during peak industrial load hours. The local OEM distributor quoted an 8-week factory turnaround time.
Solution: The substation automation engineer contacted our emergency spares division. We verified stock of an exact match 1MRK002810-AB unit, restored the customer’s backed-up PCM600 configuration file onto the replacement relay’s parameter set, and dispatched the unit via express courier within 10 hours.
Result:

• Total Protection Outage: Under 36 hours.
• Commissioning: The unit was slotted into the 19-inch cutout; fiber inter-relay communication handshakes were established on the first try.
• Client Feedback: “Having an identical 1MRK002810-AB unit with pre-tested hardware allowed us to restore primary line differential protection before the next weather front rolled in.”

Compatible Replacement Models

When replacing high-end numerical protection relays like the RED670, matching the exact part number (1MRK002810-AB) and software product ordering code (Productivity Code / BIO module configuration) is critical to ensure your PCM600 project file compiles without hardware configuration errors.

Engineering Integration Advice: If you are upgrading from an older hardware revision of the RED670 to a replacement 1MRK002810-AB unit, always verify that your ABB PCM600 (Protection and Control Manager) software version matches the relay’s internal IED Connectivity Package version. Trying to write a configuration file from an older PCM600 database into a newer hardware build can cause parameter rejection errors.

Quality Control & SOP Transparency

To ensure 100% dependability for mission-critical transmission grid protection, every ABB RED670 1MRK002810-AB relay undergoes a strict 5-stage quality audit:

1. Inbound Physical & Optical Inspection:
   • Visual inspection of front-panel LCD screens, navigation keypads, and rear optical communication transceivers (LC/ST fiber ports).
   • Verification of ABB factory security seals, hardware serial numbers, and part string 1MRK002810-AB.
2. Live Bench & Functional Testing:
   • Mounted in our dedicated ABB Relion test bench powered via a regulated DC supply.
   • Power-On Self-Test (POST): Verification of internal power supply rails, watchdog timer health, and boot sequence execution.
   • Injection Testing: Utilizing a Omicron CMC relay test set to inject simulated 3-phase AC voltages and currents across CT/VT terminals, verifying differential pickup accuracy and operating time curves.
   • Fiber Communication Handshake: Tested inter-relay optical communication links for zero frame loss or jitter.
   • 24-Hour Thermal Burn-In: Continuous operation inside an environmental test chamber at 45 °C to ensure zero thermal drift.
3. Electrical Parameter & Insulation Checks:
   • Dielectric withstand (Hi-Pot) testing at 2.0 kV AC across isolated terminal groups and chassis ground.
   • Insulation resistance testing (>50 MΩ threshold at 500 V DC).
4. Configuration Clearing & Firmware Verification:
   • Clearing all residual event logs, fault records, and temporary disturbance files from non-volatile memory.
   • Documenting internal firmware build revisions and hardware module slot maps.
5. ESD-Safe & Secure Export Packaging:
   • Sealed inside heavy-duty anti-static shielding bags.
   • Encased in custom-molded high-density foam padding to protect protruding rear terminal pins.
   • Packaged in dual-wall reinforced corrugated shipping boxes and sealed with dated “QC PASSED” tape.

Technical Integration & Field Troubleshooting Guide

Working with high-voltage protection relays requires strict adherence to safety standards and testing protocols. Honestly, most field commissioning challenges with the RED670 stem from fibre-optic attenuation issues or mismatched PCM600 communication configurations rather than internal hardware faults.

1. Common Field Faults & Troubleshooting Matrix

2. Five Critical Pitfalls to Avoid During Replacement

❗ Risk 1: Pulling CT Shorting Blocks Before Isolating Current Loops

The Trap: Opening a secondary CT circuit while primary current is flowing will generate lethal high-voltage spikes (thousands of volts) that can destroy relay analog input cards and endanger personnel.Solution: Always trip and isolate the primary line, open secondary CT shorting terminal blocks, and verify zero current flow before disconnecting CT leads from the back of the RED670.

❗ Risk 2: Mismatched PCM600 Connectivity Packages and Firmware

The Trap: Attempting to write a project configuration file to a replacement relay with an older or newer firmware version without updating the IED Connectivity Package will corrupt configuration mapping or throw syntax errors.Solution: Check the exact firmware version of the replacement 1MRK002810-AB unit in PCM600 and update your project library before downloading parameters.

❗ Risk 3: Inverting Fiber-Optic Transmit (TX) and Receive (RX) Channels

The Trap: Line differential protection relies on bidirectional optical communication between local and remote relays. Swapping TX and RX fibers will break the communication sync channel instantly.Solution: Always label fiber optic cables (LOCAL TX to REMOTE RX, LOCAL RX to REMOTE TX) before swapping out the relay.

❗ Risk 4: Ignoring Auxiliary DC Voltage Range Limits

The Trap: Relion 670 power supply modules are ordered for specific DC voltage ranges (e.g., 48-125 V DC vs 110-250 V DC). Installing a unit with a mismatched power supply range can damage internal regulators.Solution: Verify the auxiliary power rating on the relay nameplate against the substation battery bank voltage before applying DC power.

❗ Risk 5: Failing to Upload and Backup Disturbance Records Before Swap-Out

The Trap: If you replace a faulty relay without extracting historical disturbance recordings (COMTRADE files) or event logs, valuable forensic data regarding the initial fault trip is lost forever.Solution: If the relay is still partially communicative, download all disturbance files via PCM600 prior to unbolting the unit.

Protection Engineer Pro-Tip: Short your CTs, verify your auxiliary DC voltage rating, and double-check your fiber optic TX/RX polarity. Doing so will eliminate 90% of field commissioning delays.

If you need technical manual references, PCM600 parameter templates, or stock availability confirmation for the ABB RED670 Line Differential Protection Relay 1MRK002810-AB, contact our engineering support team today.