ABB RET650 Relion® 650 Series Transformer Protection and Control Intelligent Electronic Device

Description

Technical Specifications

Power Supply

• Auxiliary Voltage: 24–250 V DC / 80–240 V AC (wide input range)
• Frequency Compatibility: 50/60 Hz (dual frequency)
• Power Consumption: 15 W (typical)

Input Interfaces

• Current Inputs: Up to 30 current inputs, configurable for 1 A or 5 A nominal CTs; supports connection to 4 merging units via IEC 61850-9-2 LE process bus
• Voltage Inputs: 12 voltage inputs, compatible with standard VTs (100 V/110 V)
• Digital Inputs: 24 optically isolated digital inputs (24–250 V DC/AC)
• Analog Inputs (Optional): 8 RTD inputs for transformer temperature monitoring

Output Interfaces

• Trip Outputs: 8 high-speed relay outputs (changeover contacts) for primary fault tripping
• Control Outputs: 16 general-purpose relay outputs for breaker control and signaling
• Signal Outputs: 4 alarm signal outputs (form C contacts)

Communication

• Ethernet Ports: 2×100BASE-TX (RJ45) Ethernet ports
• Serial Ports: 2×RS-485 ports
• Optical Ports: Optional 100BASE-FX fiber optic ports (LC connector)
• Supported Protocols: IEC 61850 Edition 1/2 (GOOSE, MMS, Sampled Values), Modbus (RTU/TCP), DNP3.0, SPA, LON
• Time Synchronization: IEEE 1588 V2 (PTP), SNTP, IRIG-B
• Redundancy: PRP (Parallel Redundancy Protocol) compliant with IEC 62439-3 ed2

Display & HMI

• Display: 4.3-inch color graphical LCD with backlight
• Local Controls: Front-panel pushbuttons for manual operation and configuration
• Indicators: Multi-color LED indicators for power, operation, fault, and alarm status
• Interface Features: Customizable single-line diagram, user-definable name tags, role-based access control

Physical & Environmental

• Mounting: 19-inch rack-mounted (4U height)
• Dimensions: 177 mm (H) × 482 mm (W) × 250 mm (D)
• Weight: 5.5 kg (approximate)
• Operating Temperature: -25°C to +55°C
• Storage Temperature: -40°C to +85°C
• Humidity: 5–95% non-condensing
• Protection Rating: Front panel IP40, rear IP20
• Certifications: IEC 60255, IEC 61850, CE, UL, RoHS, EMC compliant

Performance

• Sampling Rate: 2 kHz (50 Hz system) / 2.4 kHz (60 Hz system)
• Fault Recording: 16 analog channels, 32 binary channels, 4 kHz sampling
• Event Logging: 1000+ time-stamped events with 1 ms resolution
• Trip Time: <15 ms (differential protection for internal faults)

Key Functional Features

Advanced Transformer Protection Functions

Main Differential Protection

• T2WPDIF/T3WPDIF: High-speed differential protection for two/three-winding transformers with automatic CT ratio matching and vector group compensation; eliminates need for interposing CTs
• Sensitive Turn-to-Turn Fault Detection: Symmetrical component-based algorithm for high-sensitivity detection of internal winding turn-to-turn faults
• Harmonic Restraint: 2nd harmonic restraint to block tripping during magnetizing inrush; 5th harmonic restraint to prevent tripping on overexcitation
• Stability Assurance: Superior stability during external faults and heavy through-current conditions

Earth Fault Protection

• REFPDIF: Low-impedance restricted earth-fault protection for fast, sensitive winding earth fault detection with directional zero-sequence criteria
• EFPIOC/EF4PTOC: Instantaneous and four-step residual overcurrent protection for backup earth fault coverage

Backup & Comprehensive Protection

• Overcurrent Protection: PHPIOC (instantaneous phase overcurrent), OC4PTOC (four-step directional phase overcurrent)
• Voltage Protection: UV2PTUV (two-step undervoltage), OV2PTOV (two-step overvoltage), ROV2PTOV (residual overvoltage)
• Impedance Protection: Underimpedance, load intrusion protection, and power swing detection
• Thermal Protection: Thermal overload modeling with accurate temperature tracking for windings and core
• Overexcitation Protection: Dedicated protection against overfluxing conditions
• Breaker Failure Protection: Integrated logic for backup tripping on circuit breaker failure

Control & Automation Capabilities

• Transformer Control: Local/remote circuit breaker control with programmable interlocking logic
• Voltage Control: Automatic voltage regulation (AVR) for single transformer and parallel transformer control
• Auto-Switching: Configurable auto-reclosing and tap-changer control sequences
• Flexible Logic: Graphical programming environment for custom protection and control schemes
• Setting Groups: Up to 8 configurable setting groups for flexible operation mode adaptation

Measurement & Condition Monitoring

• Precision Metering: 0.2-class energy metering; measures phase/neutral current, voltage, power (active/reactive/apparent), energy, power factor, frequency
• Temperature Monitoring: Continuous RTD-based monitoring of winding, oil, and ambient temperatures
• Asset Monitoring: Breaker operation count, contact wear estimation, trip circuit supervision
• Self-Diagnostics: Continuous internal hardware/software monitoring with pre-alarm functions
• Fault Analysis: Digital fault recorder (DFR) and sequence of events recorder (SER) for post-fault diagnostics

Communication & System Integration

• IEC 61850 Native Support: Full compliance for seamless digital substation integration
• Process Bus Connectivity: Direct interface with merging units via IEC 61850-9-2 LE for conventional/hybrid substation designs
• Horizontal Communication: High-speed GOOSE messaging for peer-to-peer interlocking
• Multi-Protocol Support: Compatibility with legacy and modern protocols for broad system integration
• Remote Access: Web-based HMI for remote monitoring, configuration, and diagnostics

Application Scenarios

Power Generation Systems

• Power Plants: Protection for step-up transformers, generator-transformer units in thermal, hydro, and gas-fired power plants
• Cogeneration Plants: Transformer protection for combined heat and power (CHP) units
• Renewable Power Plants: Step-up transformer protection for solar PV and wind farm collector systems

Power Transmission Networks

• HV/MV Substations: Primary and backup protection for main power transformers in transmission substations
• Grid Interconnection Transformers: Protection for transformers linking different voltage levels in regional grids
• Autotransformers: Comprehensive protection for large autotransformers in long-distance transmission systems

Power Distribution Networks

• Distribution Substations: Protection for distribution transformers in urban and rural distribution networks
• Industrial Distribution: Transformer protection in industrial park and commercial building distribution systems
• Shunt Reactors: Dedicated protection and monitoring for shunt reactors in reactive power compensation systems

Industrial Power Systems

• Oil & Gas: Refineries, petrochemical plants, offshore platforms main transformer protection
• Metals & Mining: Smelters, rolling mills, mining operations large power transformer protection
• Cement & Minerals: Raw material and production plant transformer protection
• Pulp & Paper: Mill substations and process power transformers protection
• Chemicals & Pharmaceuticals: Hazardous area industrial transformer protection with safety interlocks

Critical Infrastructure

• Data Centers: UPS and critical power supply transformers protection
• Hospitals & Healthcare: Life safety system power transformers protection
• Airports & Seaports: Critical load distribution transformers protection
• Rail & Mass Transit: Traction power transformers and auxiliary system transformers protection