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The ABB REU610CVVHCNR02 is a high-integrity industrial voltage relay engineered for comprehensive voltage protection and monitoring in medium-to-high voltage (MV/HV) power systems—primarily compatible with ABB REF615 feeder protection relays, RER615 transformer protection devices, and smart grid automation systems (e.g., ABB 800xA DCS). It functions as a critical protective component to detect voltage anomalies (e.g., overvoltage, undervoltage, voltage unbalance, phase loss) in MV/HV networks (e.g., 10kV~220kV), triggering fast protective actions (e.g., circuit breaker tripping, alarm activation) to prevent equipment damage (e.g., transformer insulation breakdown, generator stator burnout) and ensure grid stability. Designed for industrial ruggedness, high measurement accuracy, and seamless integration with power system protection schemes, it operates reliably in harsh power environments (e.g., substations, industrial 自备电站，renewable energy plants) where electromagnetic interference (EMI), temperature fluctuations, or voltage transients could compromise protection performance. Below is its detailed specification:
- Product Model: REU610CVVHCNR02
- Order Code: REU610CVVHCNR02
- Product Series: ABB REU600 Series MV/HV Voltage Protection Relays (Multi-Function, IEC 60255 Compliant)
- Core Function: Detects overvoltage (OV), undervoltage (UV), voltage unbalance, and phase loss in MV/HV systems; provides time-delayed or instantaneous protective outputs; monitors real-time voltage/frequency; supports remote configuration via communication protocols
- Electrical Specifications:
- Mechanical Specifications:
- Housing Material: Aluminum alloy (electrostatic coating); Flame-retardant (UL94 V-0)
- Dimensions (W×H×D): 45mm × 176mm × 170mm (DIN rail-mountable, double-width design)
- Mounting: 35mm standard DIN rail (TS 35/7.5); Snap-on installation with locking clip
- Weight: Approximately 380g
- User Interface: 2-line LCD display (backlit, 16 characters/line); 4 navigation buttons; 6 LED indicators (Power: green; OV: red; UV: amber; UVR: red; PL: red; Communication: blue)
- Protection Rating: IP40 (front panel; dust-tight, protection against finger contact)
- Environmental Ratings:
- Operating Temperature Range: -25℃~+70℃ (-13℉~158℉)
- Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
- Humidity Tolerance: ≤95% RH (non-condensing, 40℃; suitable for substation control rooms)
- Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6; no protection drift)
- Shock Resistance: 15g acceleration (11ms duration, IEC 60068-2-27; maintains mechanical integrity)
- EMC Immunity: Complies with IEC 61000-4-2 (ESD: ±8kV contact); IEC 61000-4-4 (EFT: ±2kV); IEC 61000-4-6 (RS: 10V/m) | Resists substation EMI from transformers/cables |
- Compliance Standards: IEC 60255-22-1 (overvoltage/undervoltage relays), IEC 60255-22-2 (frequency relays), IEC 61850 (smart grid communication), EN 61000-6-2 (EMC immunity), UL 508 (industrial safety), CE, RoHS, IEC 61508 (SIL 2 capable)
- Multi-Function Voltage Protection: Integrates overvoltage, undervoltage, voltage unbalance, and phase loss protection in a single device—eliminates the need for discrete relays in MV/HV systems, reducing substation control cabinet space by 40% and simplifying protection scheme design.
- High Measurement Accuracy: ±0.2% Un voltage accuracy ensures reliable detection of minor anomalies (e.g., 2% overvoltage) that could degrade MV/HV equipment (e.g., transformer insulation aging)—avoids false triggers from normal grid fluctuations (≤1% Un) and ensures no missed hazards.
- IEC 61850 Smart Grid Compatibility: Built-in IEC 61850 GOOSE/MMS protocols enable fast signal transmission (<10ms) and remote monitoring via smart grid platforms—supports substation automation, reducing on-site maintenance visits by 60% compared to legacy relays.
- Flexible Time Delays: Configurable time delays (0.1s~300s) for OV/UV protection adapt to diverse grid scenarios—e.g., 0.1s instantaneous tripping for severe overvoltage (>120% Un) and 30s delayed tripping for temporary voltage surges (e.g., load rejection), balancing protection speed and grid stability.
- PT Supervision & Self-Diagnosis: Integrates digital inputs for PT fuse supervision (detects PT open circuits) and built-in self-diagnostics (monitors internal power, ADC circuits, communication)—alerts operators to faulty PTs or relay malfunctions before they cause protection failures.
- Wide Power Supply Compatibility: Supports DC (24V~220V) and AC (110V~230V) power inputs with ±20% tolerance—adapts to global substation power systems (e.g., 220V DC in Chinese substations, 110V DC in European substations) without hardware modifications.
- SIL 2 Safety Compliance: Meets IEC 61508 SIL 2 requirements, making it suitable for safety-instrumented systems (SIS) in critical power infrastructure (e.g., nuclear power plant auxiliary grids)—ensures low dangerous failure rates (<100 FIT) for risk mitigation.
- MV/HV Substation Protection: Primary application—voltage monitoring in power distribution networks:
- 110kV/220kV Substations: Protects transmission lines and transformers; detects overvoltage (≥110% Un) caused by load rejection and undervoltage (≤80% Un) from grid faults, triggering circuit breaker tripping to prevent transformer insulation breakdown.
- Industrial Substations (10kV/35kV): Monitors voltage for factory 自备电站；voltage unbalance protection (≥10% Un) prevents 3-phase motor burnout in steel mills or refineries, while phase loss detection avoids 2-phase operation of critical pumps.
- Transformer & Generator Protection: Enhances safety of key power equipment:
- Power Transformers: Integrates with ABB RER615 transformer protection relays; overvoltage protection (≥105% Un) limits dielectric stress on transformer windings, extending insulation life by 30% in renewable energy plants (e.g., wind/solar farms).
- Synchronous Generators: Monitors generator terminal voltage (via PT); undervoltage (≤90% Un) triggers excitation system adjustment to maintain grid voltage stability, while overvoltage (≥115% Un) shuts down the generator to prevent stator core damage.
- Renewable Energy Integration: Ensures grid-compatible operation of green energy systems:
- Wind Farms (35kV Collector Grids): Protects wind turbine transformers; detects voltage surges from grid faults, isolating faulty turbines via IEC 61850 GOOSE signals to avoid cascading failures across the farm.
- Solar PV Plants (10kV Inverter Output): Monitors voltage at PV inverter terminals; overvoltage (≥110% Un) disconnects inverters from the grid (complying with grid codes), while undervoltage (≤85% Un) pauses power feed-in to prevent inverter damage.
- Critical Infrastructure Power Systems: Safeguards essential services:
- Data Center MV Grids: Maintains stable voltage for 10kV UPS systems; undervoltage protection (≤90% Un) triggers backup generator activation, preventing data loss from power interruptions.
- Hospital Substations: Protects 10kV medical equipment circuits; phase loss detection (≤50ms response) shuts down non-critical loads to ensure power supply to operating rooms and intensive care units.
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