ABB REF620 NBFNAANNNDA1BBN1XF Feeder Protection and Control IED

Description

Technical Specifications

Core System & Performance

• Processor: High‑speed numerical 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: 45–65 Hz (supports 50/60 Hz systems)
• Measurement Accuracy: Current ±1%; Voltage ±1%; Time ±1%
• Setting Groups: 6 independent setting groups for flexible operational mode switching
• Fault Recording: Disturbance recorder with 12 analog channels, 64 binary channels, and flexible triggering
• Typical Fault Trip Time: < 40 ms; optional high‑speed outputs < 1 ms for arc‑fault protection
• Event Logging: 20,000+ time‑stamped events (1 ms resolution)
• Communication Latency: GOOSE transmission time ≤3 ms for fast interlocking schemes

Power Supply

• Nominal Voltage: 90–264 V AC / 24–250 V DC (universal wide‑range input)
• Power Consumption: < 15 W (quiescent); < 20 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: 3 channels, programmable for 1 A or 5 A nominal (CT secondary)
• Residual Current: 1 channel (5 A/1 A/0.2 A) for earth‑fault detection (core balance CT compatible)
• Voltage Inputs: 3 phase voltage + 1 ground voltage (60–210 V AC nominal); 1 phase‑to‑phase input for synchrocheck
• Input Impedance: < 20 mΩ (current); < 0.05 VA (voltage)
• Thermal Withstand: Continuous 20 A; 1 s 500 A (current inputs)
• Dynamic Withstand: Half‑wave 1250 A (current inputs)
• Optional Sensor Inputs: 3 combisensor inputs (RJ‑45) for direct sensor integration

Digital I/O

• Binary Inputs: 16–24 galvanically isolated 24–250 V DC inputs (configurable; expandable via optional module)
• Power Outputs: 4 heavy‑duty trip contacts (250 V AC / 30 V DC, 5 A)
• Signal Outputs: 8–14 NO/NC configurable contacts (alarm, status, indication)
• High‑Speed Outputs: Optional 3-channel module with < 1 ms operate time for arc‑fault protection
• HMI Indicators: 3 fixed LEDs (Ready, Start, Trip); 11 dual‑color (red/green) programmable LEDs
• Local Push Buttons: 16 configurable buttons with LED indicators (local/remote switch, setting group control, disturbance trigger)

Communication Interfaces

• Ethernet: 2 ports supporting IEC 61850 Ed.1/Ed.2, GOOSE, IEC 61850‑9‑2 LE, PRP, HSR, RSTP
• Serial: RS‑485 (Modbus RTU, IEC 60870‑5‑103, DNP3.0)
• Optional: Profibus DPV1 (via SPA‑ZC 302 adapter); fiber‑optic (ST/LC)
• Local Port: Front USB for PC configuration (PCM600)
• Time Synchronization: IEEE 1588 V2 (PTP), IRIG‑B input for high‑accuracy time stamping
• Client Capacity: Simultaneous connection to 5 IEC 61850 clients, 5 Modbus clients, 1 DNP3.0 client

Physical & Environmental

• Dimensions: 233 mm (H) × 160 mm (W) × 280 mm (D)
• Weight: Approx. 4.0 kg
• Mounting: Plug‑in flush mounting; 4U rack 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

• Overcurrent Protection: 4‑stage directional/non‑directional (50/51) with DT/IDMT characteristics (IEC/ANSI compliant)
• Earth‑Fault Protection: Multi‑frequency admittance‑based (high sensitivity/selectivity), harmonics‑based, wattmetric‑based, and sensitive earth fault (SEF) detection for continuous, transient, and intermittent faultseero
• High‑Impedance Fault (HIZ): Detects downed conductors and low‑current earth faults in ungrounded systems
• Thermal Overload (49): Cable/feeder thermal memory for overheating prevention
• Phase Discontinuity (46PD) & Negative‑Sequence (46): Identifies open‑phase conditions and unbalanced loads
• Breaker Failure Protection (50BF/51BF): Backup tripping for failed circuit breakers
• Arc‑Fault Detection (AFD): 3 light‑sensor inputs for fast tripping in switchgear compartments (optional)
• Auto‑Reclose (79): 1–4 programmable shots for overhead line fault restoration
• Fault Location: Impedance‑based short‑circuit and earth‑fault location in radial networks
• Voltage & Frequency Protection: Over/undervoltage, residual overvoltage, sequence over/undervoltage, over/underfrequency, and rate‑of‑change‑of‑frequency protection
• Distributed Generation Protection: Low‑voltage ride‑through (LVRT), directional reactive power undervoltage (QU), and voltage vector shift protection (optional)
• Capacitor Bank Protection: Overload, unbalance, and resonance protection (optional)
• Busbar Protection: High‑impedance busbar protection via GOOSE messaging (no hard‑wiring required)

Advanced Control & Automation

• Circuit Breaker Control: Local/remote close/trip via HMI or communication; 3 dedicated control blocks
• Switchgear Control: 4 disconnector control blocks, 3 earthing switch control blocks, and associated position indication
• Sequence Control: Logic gates and timers for automated switching sequences
• Trip Circuit Supervision (TCS): Monitors breaker trip‑circuit integrity and alarms on faults
• Breaker Condition Monitoring: Trip counter, travel time, spring charge, and wear tracking
• Synchrocheck & Synchronization: Controlled breaker closing for parallel operation
• Interlocking Logic: Configurable to prevent unsafe equipment operations

Monitoring & Diagnostics

• Real‑Time Measurements: Phase/residual current/voltage, power, energy, power factor, harmonics, and unbalance
• Disturbance Recording: Pre/post‑fault waveform capture in COMTRADE format for forensic analysis
• Self‑Diagnostics: Continuous hardware/software monitoring with internal fault alarms
• Graphical HMI: Large color display with customizable single‑line diagrams (SLDs)
• Web‑Based Interface: Remote access for monitoring, configuration, and diagnostics
• Event & Alarm Management: 4‑level role‑based access control (viewer, operator, engineer, administrator) for secure operation

Flexibility & Integration

• Plug‑In Design: Withdrawable unit for fast replacement and maintenance
• Modular I/O: Expandable binary I/O and optional RTD/mA inputs for temperature measurement
• Multi‑Protocol Support: Seamless integration with SCADA/DCS systems (IEC 61850, Modbus, DNP3, IEC 60870‑5‑103)
• Sensor Compatibility: Works with conventional CT/VT and modern combisensors/Rogowski coils
• Redundancy: PRP/HSR support for 24/7 communication reliability
• Standard Configurations: Pre‑set templates for rapid commissioning

Application Scenarios

Utility Distribution Networks

• MV Feeders: Primary protection for overhead lines and underground cables in distribution substations
• Distribution Transformers: Backup protection for pole‑mount and pad‑mount transformers
• Capacitor Banks: Overcurrent, unbalance, and resonance protection for reactive power compensation
• Sectionalizers/Reclosers: Automated control and protection for grid sectionalizing devices
• Distributed Generation: Interconnection protection for solar, wind, and battery energy storage systems (compliant with grid codes)
• Ring/Meshed Networks: Advanced protection via interstation GOOSE communication

Industrial Power Systems

• Manufacturing Plants: Feeder and motor protection for pumps, fans, conveyors, and compressors
• Mining Operations: Heavy‑duty protection for underground power distribution
• Oil & Gas Facilities: Refineries, offshore platforms, and pipeline pumping stations
• Water & Wastewater: Pump stations and treatment plant power systems
• Data Centers: Backup power and UPS feeder protection
• Industrial Complexes: Comprehensive protection for multiple feeders and switchgear arrays

Specialized Applications

• Railway Electrification: Traction power substation feeder protection
• Marine & Offshore: Shipboard and offshore platform power distribution (wide temperature range)
• Digital Substations: IEC 61850‑based automation with process bus integration
• Arc‑Fault Protection: Fast busbar and switchgear protection in metal‑enclosed cabinets
• Retrofit Projects: Legacy system upgrade with modern protection and communication capabilities