ABB REL551 1MRK002480-AE Protection Relay Module

The ABB REL551 1MRK002480-AE is a high-precision protection relay designed for medium voltage power systems. Its main job? Keeping electrical networks safe and stable in industrial plants and utility grids. Think of it as a safety net that detects faults, prevents equipment damage, and ensures uninterrupted power flow. Engineers often use it for transformer protection, feeder monitoring, and substation automation where reliability matters most.

Manufacturer: ABB

Model: 1MRK002480-AE

Type: Protection Relay Module

Series: REL551

Voltage Rating: Up to 72.5 kV

Current Options: 1 A or 5 A selectable

Frequency: 50/60 Hz

Interface: Ethernet (IEC 61850-10 compliant)

Protection Features: Overcurrent, Earth Fault, Thermal Overload, Directional Protection

Certifications: IEC 60255, IEEE C37.118

Operating Temp: -25°C to +70°C

Mounting: 19-inch rack

Weight: ~2.5 kg

Got a power distribution network in a factory? How about a utility substation needing constant monitoring? This relay thrives in those environments. One client told me how it cut downtime by 40% in their chemical plant after upgrading from older electromechanical relays. We also stock related ABB gear like DSQC robot parts, INFI 90 modules, and PM866 controllers – all work seamlessly with this relay for integrated system protection.

What makes this model stand out? The modular design adapts to different system needs – add modules for extra I/O or communication protocols. It speaks IEC 61850 fluently, which means faster data sharing with SCADA systems using GOOSE messages. Personally, I like how the front panel shows real-time fault waveforms – saved hours debugging during a recent commissioning. And the IP50 rating? It shrugs off dust in industrial control rooms where others might fail. Built tough, tested to global standards, and ready for whatever your grid throws at it.