ABB REL551 1MRK002480-AE Protection Relay Module

Used in critical power system protection tasks where precision matters. This relay safeguards electrical networks in industrial plants and utility substations through reliable fault detection. Engineers often deploy it for motor protection, transformer backup, and distribution line monitoring where 24/7 uptime is essential.

Technical Specifications

Real-World Applications

Commonly found in substation automation systems where it guards against phase imbalances in 13.8kV distribution networks. We’ve supplied these for oil refinery MCC retrofits and wind farm grid interconnection projects. Its thermal overload algorithm works particularly well with high-inertia motor starts.

Our inventory includes complementary components like:

• ABB’s REL670 series for primary substation protection
• GE’s D60 line relays for transmission system backup
• Siemens 7SJ61 overcurrent relays for medium voltage switchgear

Why Partner With Us

We maintain 16 regional warehouses across 6 countries with 4-hour response times for critical spares. When a steel plant in Indonesia needed emergency replacement during monsoon season, we coordinated same-day delivery through our Singapore hub.

All products carry our standard 1-year warranty covering manufacturing defects. While most relays arrive within 3-5 business days, we’ve expedited shipments to Dubai within 48 hours when required.