Description
REU615: Product Overview
The ABB REU615 is a voltage protection and control relay from ABB’s Relion® 615 Series, designed for utility and industrial power distribution systems—including networks with distributed power generation. As a core component of ABB’s substation automation portfolio, it delivers comprehensive voltage and frequency protection, enabling reliable operation of power transformers, generators, and busbars.
Role in Automation Systems:
Positioned as a voltage protection and control device, the REU615 performs three primary functions:
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Voltage Supervision: Monitors busbar voltage to detect overvoltage/undervoltage conditions, triggering alarms or corrective actions (e.g., load shedding).
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Frequency Protection: Guards against overfrequency/underfrequency events in power generators and AC equipment, preventing damage from unstable grid conditions.
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Voltage Regulation: Enables automatic or manual voltage regulation for power transformers with motor-driven on-load tap changers, maintaining optimal voltage levels in the distribution network.
Core Functionality:
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Customizable Configurations: Offers ready-made standard setups for fast deployment, with tailoring capabilities to meet specific application needs (e.g., industrial vs. utility environments).
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Graphical Display: Features a large graphical display for visualizing customizable single-line diagrams (SLDs), accessible locally or via a web-browser-based HMI for remote monitoring.
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Lifecycle Services: Supported by ABB’s extensive lifecycle services, including installation, testing, and maintenance, ensuring long-term reliability.
Platform Benefits (Relion® 615 Series):
The REU615 leverages ABB’s Relion® platform, which is renowned for:
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Compactness: Combines protection, control, and measurement functions in a single, space-saving device.
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Versatility: Suitable for a wide range of applications—from small industrial substations to large utility power plants.
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Interoperability: Supports multiple communication protocols (IEC 61850, Modbus, DNP3) for seamless integration with existing SCADA and control systems.
ABB REU615
Technical Specifications
Model Number: REU615
Manufacturer: ABB
Product Type: Voltage Protection and Control Relay
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Communication Protocols: IEC 61850 (Editions 1 & 2), Modbus RTU/TCP, DNP3, IEC 60870-5-103
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Protection Functions: Overvoltage/undervoltage, overfrequency/underfrequency, load shedding/restoration
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Voltage Regulation: Automatic/manual for power transformers with motor-driven on-load tap changers
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Display: Large graphical display (customizable SLDs, local/remote HMI access)
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Time Synchronization: IEEE 1588 V2 for high-accuracy substation-level Ethernet communication
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Operating Temperature: -20°C to +60°C (-4°F to 140°F)
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Storage Temperature: -40°C to +85°C (-40°F to 185°F)
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Humidity: 5–95% non-condensing
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Dimensions (W×H×D): 100 mm × 125 mm × 75 mm (3.94 in × 4.92 in × 2.95 in)
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Weight: 0.5 kg (1.1 lbs)
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Certifications: IEC 61850, IEEE 1588 V2, CE, UL
Core Features & Customer Value
1. Comprehensive Voltage and Frequency Protection:
The REU615’s advanced protection algorithms detect overvoltage/undervoltage and overfrequency/underfrequency events in real time, triggering immediate corrective actions (e.g., load shedding, generator tripping). This prevents damage to sensitive equipment (e.g., power transformers, generators) and ensures grid stability—critical for utilities and industrial facilities.
2. Flexible Voltage Regulation:
With support for automatic and manual voltage regulation, the REU615 adapts to changing load conditions in distribution networks. For example, in an industrial plant, it can adjust the voltage of a power transformer to maintain optimal levels for sensitive equipment (e.g., motors, drives), reducing downtime and improving efficiency.
3. Seamless Communication Integration:
The REU615’s support for IEC 61850 (Editions 1 & 2) and other protocols (Modbus, DNP3) enables seamless integration with existing SCADA and control systems. This reduces the need for custom communication interfaces, saving time and money during system setup.
4. Intuitive Graphical Display:
The large graphical display provides a clear visualization of the distribution network’s single-line diagram (SLD), allowing operators to monitor voltage and frequency levels in real time. The web-browser-based HMI enables remote access, reducing the need for onsite maintenance and improving operational efficiency.
ABB REU615
Typical Applications
The ABB REU615 is widely used in industries requiring reliable voltage protection and control:
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Power Generation:
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Protects generators from overfrequency/underfrequency events in thermal power plants.
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Example: In a coal-fired power plant, the REU615 monitors the generator’s frequency and triggers a trip if it deviates from the setpoint, preventing damage to the turbine.
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Industrial Manufacturing:
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Regulates voltage for power transformers in automotive assembly plants.
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Example: In a car factory, the REU615 adjusts the voltage of a transformer supplying power to robotic arms, ensuring consistent performance and reducing downtime.
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Utility Distribution:
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Monitors busbar voltage in municipal power grids.
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Example: In a city’s power distribution network, the REU615 detects an overvoltage condition and triggers load shedding, preventing damage to residential and commercial equipment.
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