ABB REL561 1MRK002496-AC

Description

Product Description

The ABB REL561 1MRK002496-AC, detailed further here, is a sophisticated numerical feeder protection relay from ABB’s renowned RELION® 500 series. While not a PLC spare part in the traditional sense, it is a critical component in industrial automation and power management systems, designed to protect and control medium-voltage electrical feeders and motors. This specific relay model functions as a self-contained intelligent electronic device (IED) that continuously monitors electrical parameters like current, voltage, and frequency to detect faults such as overcurrent, earth faults, and phase imbalances. The ABB REL561 is engineered for extreme reliability, providing precise tripping commands to circuit breakers to isolate faults, thereby protecting expensive electrical equipment and ensuring grid stability. For systems requiring integrated power management, the ABB REL561 1MRK002496-AC can communicate directly with a supervisory PLC or SCADA system via industry-standard protocols, making it a vital node in a modern, networked automation architecture.

Product Parameters

• Manufacturer: ABB

• Product Line: RELION® 500 Series

• Model: REL561

• Order Code: 1MRK002496-AC

• Main Protection Functions: Overcurrent (definite and inverse time), directional/non-directional earth-fault, phase discontinuity, thermal overload protection for feeders.

• Control Functions: Circuit breaker control, autoreclosing, synchrocheck.

• Measurement: Three-phase currents and voltages, frequency, power (kW, kVAR), energy, harmonics.

• Communication Interfaces: Multiple ports supporting IEC 61850, Modbus RTU/TCP, and DNP3 protocols for seamless integration.

• Inputs/Outputs: Configurable binary inputs and relay outputs for control and signaling.

• Power Supply: Typically available for a range of DC (24-250V) or AC (110-240V) auxiliary supplies.

• Standards: Compliant with IEC 60255, IEEE C37.90, and other relevant utility and industrial standards.

Advantages and Features

• High Reliability & Precision: Utilizes advanced numerical algorithms for accurate and fast fault detection, minimizing nuisance trips and equipment damage.

• Flexible Communication: Native support for IEC 61850 simplifies substation integration and enables peer-to-peer communication with other IEDs, reducing wiring.

• Comprehensive Monitoring: Provides extensive metering and event recording (disturbance, fault, and event logs) for detailed power system analysis and diagnostics.

• User-Friendly Configuration: Intuitive local HMI and powerful PCM600 configuration software allow for easy setting, testing, and monitoring.

• Robust Design: Built for harsh electrical environments with high immunity to electromagnetic interference (EMI) and a wide operating temperature range.

Application Cases in Application Fields

• Industrial Power Distribution: Protects main incoming feeders and major distribution feeders within large manufacturing plants, chemical facilities, and oil refineries. Here, the ABB REL561 ensures process continuity by preventing widespread outages from feeder faults.

• Renewable Energy Plants: Used in collector substations for solar or wind farms to protect feeders connecting multiple inverters or turbines to the main step-up transformer.

• Marine & Offshore: Provides critical feeder protection on vessels and offshore platforms where system reliability and fault discrimination are paramount for safety and operations.

• Infrastructure: Applied in airport, rail, and data center power distribution networks to guarantee high availability of essential services.

Comparisons with Competing Products

Compared to competing feeder protection relays from Siemens (SIPROTEC 5) or GE (Multilin), the ABB REL561 1MRK002496-AC holds a strong position:

• System Integration (IEC 61850): The REL561 is a mature product with robust support for the modern IEC 61850 standard, comparable to its top competitors. Its interoperability within ABB’s own system is seamless.

• Function Scope vs. Simplicity: It offers a comprehensive, pre-defined set of feeder protection functions. Some competitors may offer more modular function blocks, allowing greater customization at the cost of increased engineering complexity.

• User Interface & Software: ABB’s PCM600 software is a recognized strength, often praised for its usability and powerful tools for setting, documentation, and disturbance analysis.

• Market Position: The RELION 500 series, including the REL561, is a well-established and widely trusted product line with a vast global installed base, ensuring long-term support and available expertise.

Selection Suggestions and Precautions

1. Define Protection Requirements Precisely: Carefully review the electrical system’s single-line diagram to specify the exact protection functions (e.g., directional earth fault, voltage-based blocking) needed for the ABB REL561. The order code 1MRK002496-AC specifies a particular configuration.

2. Ensure Communication Compatibility: Verify that the communication protocols (IEC 61850, Modbus TCP) of the REL561 match the requirements of your central SCADA, DCS, or PLC system for proper integration.

3. Consider the Auxiliary Supply: Confirm the available control power voltage in your switchgear and select the matching power supply variant for the relay.

4. Plan for Engineering & Testing: Factor in the need for skilled personnel and proper test equipment (like the CPC 100 system) for configuration, commissioning, and primary injection testing. The relay’s complexity necessitates expert handling.

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