Description
Product Overview
The ABB REL551 1MRK002480-AE is a high-performance numerical protection relay designed for medium-voltage (MV) power systems, offering advanced protection, control, and monitoring capabilities for transformers, motors, feeders, and busbars. As part of ABB’s RELION® series, the REL551 1MRK002480-AE combines cutting-edge digital technology with a modular architecture to ensure reliable operation in power distribution networks, industrial plants, and renewable energy systems. This relay serves as a critical component in protecting electrical assets from faults such as overcurrent, earth faults, and voltage irregularities, while also enabling seamless integration with supervisory control and data acquisition (SCADA) systems.
Engineered with a focus on flexibility, the ABB REL551 1MRK002480-AE supports a wide range of protection functions, including adaptive overcurrent protection, distance protection, and transformer differential protection. Its intuitive configuration via ABB’s RELION® Manager software allows engineers to tailor settings to specific application requirements, from simple radial networks to complex meshed systems. Positioned as a scalable solution, the relay enhances grid stability and operational efficiency by reducing fault clearance times and minimizing downtime. The REL551 1MRK002480-AE embodies ABB’s commitment to innovation in power protection, delivering robust performance and future-ready features for modern energy systems.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | REL551 1MRK002480-AE |
| Manufacturer | ABB |
| Product Type | Numerical Protection Relay |
| Voltage Range | 3–36 kV (MV systems) |
| Current Range | 1–2000 A (via CTs) |
| Protection Functions | Overcurrent, earth fault, distance, differential, voltage protection |
| Communication Interfaces | Ethernet (IEC 61850), RS-485 (Modbus RTU) |
| Processing Power | Dual-core microprocessor (200 MHz) |
| Operating Temperature | -40°C to +70°C |
| Dimensions (W×H×D) | 482 mm × 177 mm × 290 mm (19” rack-mounted) |
| Certification | IEC 61850, IEEE 1588, CE, UL |
REL551 1MRK002480-AE
Main Features and Advantages
Comprehensive Protection Suite: The ABB REL551 1MRK002480-AE integrates multiple protection functions in a single device, reducing hardware complexity and installation costs. Its adaptive overcurrent protection dynamically adjusts to changing network conditions, while the distance protection feature accurately locates faults along transmission lines, minimizing the impact on healthy parts of the grid. For transformer protection, the relay supports harmonic restraint and inrush current mitigation, ensuring reliable operation during energization.
Advanced Communication and Integration: Built for digital substations, the relay supports IEC 61850 communication, enabling seamless integration with SCADA systems and other intelligent electronic devices (IEDs). GOOSE/SMV messaging ensures fast peer-to-peer communication for critical functions like breaker failure protection. The relay’s built-in web server allows for remote configuration and monitoring via a standard browser, enhancing operational visibility and reducing maintenance costs.
Modular and Rugged Design: The relay’s modular architecture allows for easy expansion with optional I/O modules and communication cards, adapting to evolving system requirements. Its rugged enclosure and conformal-coated PCBs provide immunity to electromagnetic interference (EMI) and harsh environmental conditions, making it suitable for outdoor switchyards and industrial environments with high vibration or humidity.
Cybersecurity and Diagnostics: The REL551 1MRK002480-AE incorporates secure communication protocols (TLS, SSH) and role-based access control to protect against cyber threats. Built-in self-diagnostics monitor internal components and provide detailed event logs, including fault records and oscillographic data for post-fault analysis. This proactive approach to maintenance reduces unplanned downtime and ensures compliance with regulatory requirements.
REL551 1MRK002480-AE
Application Field
The ABB REL551 1MRK002480-AE is widely deployed in various sectors requiring robust power system protection. In utility substations, it safeguards MV feeders and transformers, ensuring reliable power distribution to residential and commercial areas. For industrial facilities such as manufacturing plants and oil refineries, the relay protects critical assets like motors and generators from faults, minimizing production disruptions and ensuring safety.
In renewable energy systems, the REL551 1MRK002480-AE supports the integration of solar farms and wind parks into the grid, providing protection for inverters and grid connection points. It also excels in smart grid applications, where its IEC 61850 compatibility enables real-time data exchange for advanced grid management and microgrid operations. By addressing challenges like fault detection in complex networks and legacy system modernization, the relay empowers operators to build more resilient and efficient energy systems.
Related Products
- ABB REL561 1MRK002481-AB: A higher-voltage variant for transmission systems, supporting up to 132 kV.
- ABB REC615 1MRK008512-AA: A compact relay for distribution networks, ideal for smaller MV applications.
- ABB CI502A 3BSE018120R1: A communication interface module for enhancing IEC 61850 capabilities.
- ABB TB840 Terminal Block: A rugged terminal block for secure CT/PT connections.
- ABB PSS 2000 Power System Stabilizer: A complementary module for enhancing grid stability during transient events.
Installation and Maintenance
Pre-installation preparation: Mount the REL551 1MRK002480-AE in a 19” rack within a grounded control cabinet, ensuring proper ventilation. Connect current and voltage transformers (CTs/PTs) to the relay’s analog inputs, and terminate control cables for circuit breakers and status indicators. Use RELION® Manager to configure protection settings, communication parameters, and GOOSE/SMV messages, ensuring compatibility with the substation’s IEC 61850 network.
Maintenance recommendations: Regularly review the relay’s event logs and diagnostic reports via RELION® Manager to identify trends or potential issues. Perform annual functional tests to validate protection functions, such as overcurrent tripping and fault location accuracy. Clean the relay’s vents and terminals to prevent dust accumulation, and inspect cable connections for tightness, especially in high-vibration environments. Update firmware quarterly to incorporate new features and security patches, and maintain a backup of all configurations for quick recovery.
Product Guarantee
ABB stands behind the REL551 1MRK002480-AE with a comprehensive quality guarantee, including a standard 3-year warranty against defects in materials and workmanship. ABB’s global service network provides 24/7 technical support, on-site commissioning, and remote diagnostics to ensure optimal performance. For critical applications, optional extended warranties and proactive maintenance plans are available, including regular health checks and priority response times. The relay’s compliance with international standards and rigorous testing processes reinforce its reliability in power systems worldwide, making it a trusted choice for mission-critical protection needs.
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