Description
Technical Specifications
- Product Model: RED670 1MRK004810‑KG
- Brand: ABB
- Warranty: One Year
- Input Voltage: 24‑250 V DC / 48‑240 V AC auxiliary supply
- Operating Temperature: -25 °C to +70 °C
- Storage Temperature: -40 °C to +85 °C
- Response Time: ≤12 ms line‑differential trip operate time
- Protection Class: IP40 front panel, IP20 for rear terminals
- Accuracy Class: Class 0.2S for metering and protection measurement
- Output Frequency: 50 / 60 Hz system frequency adaptive
- Rated Current Range: 1‑5 A CT secondary input
- Communication Interface: Dual Ethernet, fiber‑optic differential port, RS485, SPA serial port
- Supported Protocols: IEC 61850 MMS/GOOSE, IEC 60870‑5‑103, DNP3.0, SPA, Modbus TCP
- Overload Capacity: 30× rated continuous current for 1 second short‑time withstand
- Dimensions: 230 mm × 160 mm × 100 mm (19‑inch 6U rack mount)
Product Overview
The ABB RED670 1MRK004810‑KG is a high‑performance numerical line‑differential protection IED from the Relion product family, purpose‑built for overhead transmission lines and underground power cables within medium‑ and high‑voltage substations. This intelligent electronic device integrates line differential, distance protection, overcurrent, breaker failure protection, auto‑reclosing, fault location and disturbance recording into a single rack‑mounted unit. It addresses key substation pain points including slow fault isolation, inconsistent protection coordination, limited post‑fault diagnostic data, and complex multi‑vendor protocol interoperability issues. Protection engineers, substation system integrators and utility maintenance teams benefit from this hardware, as its unified feature set reduces the total quantity of substation protection hardware and delivers precise timestamped fault records for root‑cause analysis. It supports both fiber‑optic and pilot‑wire differential communication channels and fits for green‑field substation deployment as well as retrofit projects for ageing protection systems.
Application Scenarios
- Transmission Line Primary Protection: Deployed as main differential protection for overhead transmission lines and underground cable feeders. It detects internal short‑circuit faults across the full line length, delivers fast tripping action and distinguishes external through‑fault events to avoid unwanted circuit‑breaker operation.
- Distribution Substation Feeder Protection: Used for critical MV‑HV distribution feeders with high reliability requirements. Distance and directional overcurrent backup functions provide layered protection when primary differential logic is unavailable, maintaining network security during communication channel failures.
- Substation Retrofit and Modernization Projects: Replaces legacy electromechanical or early‑generation numerical relays. Native multi‑protocol support enables seamless integration with existing SCADA and substation automation systems without extensive cabinet re‑wiring.
- Series‑Compensated Line Protection Application: Handles protection tasks for series‑capacitor compensated transmission circuits. Adaptive impedance algorithms counteract voltage inversion risks and maintain stable protection performance under complex power‑system transient conditions.
Key Installation Notes
- Install the device inside locked substation control cabinets on standard 19‑inch rack housing to preserve IP40 front‑panel protection rating.
- Deploy dedicated fiber‑optic links for line‑differential communication; separate fiber signal paths from high‑voltage power cables to avoid electromagnetic interference.
- Complete CT/VT circuit wiring verification and protection‑setting configuration according to network coordination study documents before energisation.
- Use PCM600 software for parameterisation, firmware upgrades and disturbance‑record file retrieval.
- Validate GOOSE message exchange and time‑synchronisation from GPS clock source to guarantee accurate event‑timestamping across the substation automation system.
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