ABB REG670 Generator and Generator-Transformer Protection and Control IED

Description

Technical Specifications

Core System & Performance

• Processor: High‑speed parallel processing platform for real‑time protection, control, and measurement
• Sampling Rate: 32 samples per power cycle (1.2 kHz at 50 Hz) for precise fault detection
• Operating Frequency: 9 Hz to 95 Hz (supports 50/60 Hz systems)
• Measurement Accuracy: Current/voltage ±0.25% (class 0.5/1.0); power ±0.5%
• Setting Groups: 6 independent setting groups for flexible operational mode switching
• Fault Recording: Disturbance recorder with 40 analog channels (30 physical, 10 derived), 96 binary channels, 10 seconds pre‑fault data, and 100 disturbance storage
• Typical Fault Trip Time: Generator differential protection ≤15 ms; high security and speed
• Event Logging: 1,000+ time‑stamped events with 1 ms resolution
• Communication Latency: GOOSE transmission ≤3 ms for high‑speed interlocking

Power Supply

• Nominal Voltage: 24–60 V DC / 90–250 V DC (wide‑range universal input)
• Power Consumption: < 20 W (quiescent); < 30 W (operating)
• Isolation: Full galvanic isolation between power, I/O, and communication circuits
• Voltage Interruption Tolerance: < 50 ms without relay reset

Analog Inputs

• Phase Current: Up to 24 channels, programmable for 1 A or 5 A nominal (CT secondary)
• Residual Current: 2 channels for earth‑fault detection (5 A/1 A/0.2 A)
• Voltage Inputs: 6 channels (3 phase + 1 neutral + 2 auxiliary) for 60–210 V AC nominal
• mA Inputs: 6 transducer channels for temperature, pressure, and other non‑electrical measurements
• Thermal Withstand: Continuous 20 A; 1 s 500 A (current inputs)
• Dynamic Withstand: Half‑wave 1250 A (current inputs)
• Metering Class: CT inputs optimized for 0.5% rated power detection (reverse power protection)

Digital I/O

• Binary Inputs: Up to 96 isolated 24–250 V DC inputs (expandable via modules)
• Power Outputs: 24 heavy‑duty trip contacts (250 V AC / 30 V DC, 5 A)
• Signal Outputs: Up to 48 NO/NC configurable contacts (alarm, status, indication)
• High‑Speed Outputs: Optional fast‑acting outputs for arc‑fault and critical trip applications
• HMI Indicators: 6 red + 9 yellow LEDs; large color display for single‑line diagrams (SLDs)
• Local Controls: Selector switches (2–32 positions), local/remote toggle, and setting group controls

Communication Interfaces

• Ethernet: 2 ports supporting IEC 61850 Ed.1/Ed.2, GOOSE, IEC 61850‑9‑2 LE, PRP/HSR redundancy
• Fiber Optic: Dedicated optical link for 192 binary signal transfer (bidirectional) between 670 series IEDs
• Serial: RS‑485 (Modbus RTU, IEC 60870‑5‑103, DNP3.0, SPA, LON)
• Local Port: Front USB for PC configuration (PCM600)
• Time Sync: IEEE 1588 PTP V2, IRIG‑B, SNTP for high‑accuracy time stamping
• Client Capacity: Simultaneous connection to 8 IEC 61850 clients, 8 Modbus clients, 1 DNP3.0 client

Physical & Environmental

• Form Factor: Full 19″ rack (6U height, 24 analog inputs) or half 19″ rack (6U height, 12 analog inputs)
• Dimensions: Full: 266 mm (H) × 185 mm (W) × 290 mm (D); Half: 133 mm (H) × 185 mm (W) × 290 mm (D)
• Weight: Full: ~6.5 kg; Half: ~4.5 kg
• Mounting: 19″ rack‑mountable; flush‑mount compatible
• Protection Rating: IP54 (front); IP20 (rear terminals)
• Operating Temperature: -25 °C to +70 °C
• Storage Temperature: -40 °C to +85 °C
• Humidity: 5%–95% RH (non‑condensing)
• EMC Compliance: IEC 61000 series, EN 50081‑2, CISPR 11
• Certifications: CE, IEC 60255, IEEE C37.90, RoHS

Functional Features

Comprehensive Protection Functions

Main Protection

• Generator Differential (87G): Percentage bias restraint; negative‑sequence internal/external fault discrimination; typical operate time ≤15 ms; high security and sensitivity for interturn faults
• Transformer Differential (87T): Two/three‑winding support; automatic ratio matching, vector group compensation, and tap‑changer position adjustment; second harmonic restraint for inrush; fifth harmonic for overexcitation
• 100% Stator Earth Fault: Dual options—injection‑based (works at standstill via REX060/REX061) and 3rd harmonic differential (full winding coverage, including neutral end)
• 95% Stator Earth Fault: Fundamental frequency measurement at star point; complements 3rd harmonic for full winding protection
• Rotor Earth Fault (64R): Injection‑based sensitive detection for rotor winding insulation faults
• Distance Protection (21): Full‑scheme mho characteristic; two zones (Z1/Z2) with independent block/trip; directional element for zone restriction
• Pole Slip/Out‑of‑Step (78): Detects slips 0.2–8 Hz; discriminates generating/motoring direction; trip after set slips or rotor angle
• Loss of Excitation (40): Adaptive impedance characteristics for all generator modes

Backup & Auxiliary Protection

• Overcurrent (50/51): 4‑stage directional/non‑directional; definite/inverse time characteristics (IEC/ANSI)
• Residual Overcurrent (50N/51N): 4‑stage for earth‑fault detection; sensitive directional residual overcurrent/power (67N)
• Negative Sequence Overcurrent (46): 2‑stage for unbalanced load and open‑phase detection
• Thermal Overload (49): Two‑time‑constant thermal memory for generator/transformer overheating protection
• Breaker Failure (50BF/51BF): 4‑stage backup tripping for failed circuit breakers
• Voltage Protection (27/59): Two‑stage over/undervoltage; residual overvoltage; overexcitation (24)
• Frequency Protection (81): Over/underfrequency; rate‑of‑change‑of‑frequency; frequency time accumulation
• Pole Discordance (52PD): Detects breaker pole misoperation
• Accidental Energizing (50AE): Prevents unsafe synchronous generator start‑up
• Fuse Failure / Current Circuit Supervision: Monitors secondary circuit integrity

Advanced Control & Automation

• Synchronization (25): Synchrocheck, energizing check, and closed‑loop synchronizing for parallel operation
• Apparatus Control: Manages up to 30 apparatuses (6 circuit breakers); interlocking logic to prevent unsafe operations
• Tap Changer Control (84): Supervision of on‑load tap changers (OLTC) with position monitoring
• Sequence Control: Configurable logic gates and timers for automated switching sequences
• Circuit Breaker Monitoring: Trip counter, travel time, spring charge status, and wear tracking
• Local/Remote Control: HMI or communication‑based close/trip; role‑based access control (4 levels)

Monitoring & Diagnostics

• Real‑Time Measurements: Phase/residual current/voltage, power (P/Q/S), energy, power factor, frequency, harmonics, and unbalance
• Disturbance Recording: COMTRADE format pre/post‑fault waveform capture for forensic analysis
• Self‑Diagnostics: Continuous monitoring of hardware/software; internal fault alarms; open CT detection
• Graphical HMI: Color display with customizable SLDs; real‑time trend plots and event logs
• Web‑Based Interface: Remote access for monitoring, configuration, and diagnostics
• User Management: 4‑level access (viewer, operator, engineer, administrator) for secure operation

Flexibility & Integration

• Modular Hardware: Expandable I/O modules; optional communication and application function cards
• Multi‑Instance Functions: Reusable protection blocks (e.g., differential, overcurrent) for multi‑object protection in one IED
• Pre‑Configured Solutions: Type‑tested templates for generator‑only and generator‑transformer units (12/24 analog inputs)
• Sensor Compatibility: Works with conventional CT/VT, Rogowski coils, and combisensors
• Redundancy: PRP/HSR for 24/7 communication reliability; dual IED deployment for full system redundancy
• Adaptive Logic: Automatically detects generator operating mode and adjusts protection/control behavior

Application Scenarios

Power Generation Plants

• Thermal Power Stations: Protection and control of steam turbines, gas turbines, and combined‑cycle units; integration of generator and step‑up transformer protection
• Hydro & Pumped‑Storage Plants: Full protection for hydro generators (including 100% stator earth fault); adaptive operation for generating/pumping modes; pumped‑storage unit synchronization
• Nuclear Power Plants: High‑reliability protection for critical generator‑transformer blocks; redundant IED configurations; compliance with strict safety standards
• Renewable Energy Plants: Protection for wind turbines, solar thermal generators, and biomass units; grid‑code compliant integration with utility grids

Industrial & Commercial Power Systems

• Cogeneration Plants: On‑site power generation with grid interconnection protection; reverse power monitoring for export/import control
• Large Industrial Facilities: Mining, oil & gas, data centers, and manufacturing plants; generator‑transformer protection for critical loads
• District Heating & Cooling: CHP (combined heat and power) unit protection and control; seamless integration with utility grids

Specialized Applications

• Shunt Reactors: Protection and control for shunt reactors in high‑voltage substations
• Retrofit Projects: Upgrade of legacy protection systems with modern IEDs; minimal downtime during commissioning
• Digital Substations: IEC 61850 process bus integration; high‑speed GOOSE messaging for substation automation
• Isolated Power Systems: Standalone generator protection for remote locations (mines, islands, military bases)