Product Short Description
The ABB REF620E is a high‑performance, versatile intelligent electronic device (IED) from ABB’s Relion® 620 series, purpose‑built for comprehensive protection, control, measurement, and supervision of medium‑voltage (3 kV–36 kV) feeders in utility and industrial power distribution systemsABB. It serves as a primary protection solution for radial, looped, and meshed networks, including systems with distributed generation (DG), across isolated neutral, resistance‑earthed, compensated, and solidly‑earthed configurationseero. The REF620E integrates advanced protection algorithms, robust I/O, and high‑speed communication in a compact, withdrawable plug‑in design, enabling easy installation, commissioning, and maintenanceeero. It supports seamless integration into both legacy and modern IEC 61850‑based digital substation automation systems, making it ideal for a wide range of feeder bay applicationseero.
Description
Technical Specifications
| Parameter | Detail |
|---|---|
| Manufacturer | ABB |
| Model | REF620E |
| Product Type | Medium‑Voltage Feeder Protection and Control IED |
| Application Voltage | 3 kV–36 kV (medium‑voltage distribution) |
| Rated Frequency | 50 Hz / 60 Hz (user‑selectable) |
| Auxiliary Power Supply | 24–250 V DC / 110–240 V AC ±20%; 50/60 Hz |
| Power Consumption | < 18 W (DC nominal) / < 22 W (AC nominal) |
| Processor | High‑speed multi‑core DSP for real‑time protection and control |
| Analog Inputs (Conventional CT/VT) | 3 phase current inputs (1 A / 5 A configurable); 1 residual current input (1 A / 5 A); 3 phase voltage inputs; 1 residual voltage input; 1 synchrocheck voltage inputeero |
| Analog Inputs (Sensor Version) | 3 combisensor inputs (RJ‑45); 1 conventional residual current input (0.2 A / 1 A)eero |
| Digital Inputs | 24 galvanically isolated dry‑contact inputs (standard); expandable via optional I/O moduleseero |
| Digital Outputs | 14 configurable outputs (standard); includes heavy‑duty trip contacts and signal contacts; expandable via optional I/O moduleseero |
| Communication Interfaces | Dual Ethernet (10/100 Mbps) with HSR/PRP redundancy; RS‑485; optional fiber optic portseero |
| Supported Protocols | IEC 61850 Ed.1/Ed.2 (MMS, GOOSE, IEC 61850‑9‑2 LE), IEC 60870‑5‑103, Modbus RTU/TCP, DNP3, Profibus DPV1 (via converter)eero |
| Time Synchronization | IEEE 1588 PTP V2 (< 4 µs accuracy), IRIG‑B, SNTP |
| HMI | Large graphical LCD display; customizable single‑line diagrams (SLDs); 11 programmable LEDs; 16 configurable pushbuttons; local/remote mode switcheero |
| Operating Temperature | -25 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5–95% (non‑condensing) |
| Ingress Protection | IP20 (terminal area), IP40 (front panel) |
| Mounting | Withdrawable plug‑in design for 19‑inch rack or panel mounting |
| Dimensions | 266 mm (width) × 177 mm (height) × 260 mm (depth) |
| Weight | Approx. 5.2 kg (complete unit) |
| Certifications | KEMA type‑test certified, CE, IEC 61000, RoHS, UL, DNV (optional) |
| MTBF | ≥ 150,000 hours (IEC 61709 compliant) |
Functional Features
Comprehensive Protection Functions
- Overcurrent Protection: Four‑stage directional/non‑directional phase overcurrent (50/51) with definite‑time, IDMT, and instantaneous characteristics; negative‑sequence overcurrent protectioneero.
- Earth‑Fault Protection: Multi‑frequency admittance‑based sensitive earth‑fault (SEF) protection; directional/non‑directional residual overcurrent (50N/51N); transient/intermittent earth‑fault detection; high‑impedance earth‑fault protectioneero.
- Thermal Overload Protection: Real‑time thermal modeling for cables and overhead lines to prevent overheating and insulation degradationeero.
- Voltage & Frequency Protection: Overvoltage (59), undervoltage (27), residual overvoltage, positive‑sequence undervoltage, negative‑sequence overvoltage; overfrequency (81O), underfrequency (81U), rate‑of‑change‑of‑frequency (ROCOF) protectioneero.
- Arc‑Fault Protection: Three light‑sensor channels for fast arc detection in switchgear; high‑speed tripping (< 1 ms) to minimize equipment damageeero.
- Breaker Failure Protection (CBFP): Backup tripping initiation for main breaker fault clearance failureeero.
- Auto‑Reclosing: Configurable 1–4 shot multi‑pole auto‑reclose (79) for rapid restoration after transient faults on overhead lineseero.
- Fault Location: Impedance‑based short‑circuit and earth‑fault location for radial and looped networkseero.
- Phase Discontinuity Protection: Detects broken conductors and phase imbalance to protect connected loadseero.
- Interconnection Protection: Reverse power/directional overpower, voltage vector shift, low‑voltage ride‑through (LVRT), and anti‑islanding protection for distributed generation integrationeero.
- Busbar Protection: High‑impedance busbar protection for medium‑voltage busbarseero.
- Capacitor Bank Protection: Overload, unbalance, and resonance protection for single‑star and double‑star connected capacitor bankseero.
- Motor Protection: Basic motor protection (overload, stall, phase imbalance) for motor feederseero.
Control & Automation
- Local/Remote Control: Manual and SCADA‑based control of up to 3 circuit breakers, 4 disconnectors, and 3 earthing switches via digital outputseero.
- Configurable Logic: User‑programmable logic (PLC‑like) for custom interlocking, automation sequences, and control logiceero.
- Setting Groups: 8 independent setting groups for quick adaptation to network operating modes (e.g., normal, maintenance, DG integration).
- Breaker Condition Monitoring: Trip counters, wear monitoring, and maintenance alarms for predictive upkeepeero.
- Synchro‑Check: Verifies voltage, phase angle, and frequency conditions for safe network interconnectioneero.
- Current Circuit Supervision: Detects CT secondary circuit faults and blocks protection functions to prevent misoperationeero.
Measurement & Monitoring
- Precision Measurements: High‑accuracy measurement of phase currents, residual current, voltages, power (active/reactive/apparent), energy, power factor, frequency, and sequence components.
- Event & Disturbance Recording: 2,000 sequence‑of‑events (SOE) logs with millisecond‑precision timestamps; 12 analog + 64 binary channels disturbance recorder (256 cycles per record) in COMTRADE format.
- Load Profile Recording: Records up to 12 selectable load quantities for over 1 year, supporting long‑term load analysis.
- Self‑Supervision: Continuous internal diagnostics for hardware/software faults, with alarm generation and fault logging.
- Role‑Based Access Control: Four‑level authentication (viewer, operator, engineer, administrator) for secure local and remote operationeero.
Communication & Integration
- IEC 61850 Compliance: Full support for MMS, GOOSE, and process bus (IEC 61850‑9‑2 LE) for digital substation interoperability and reduced wiringeero.
- Redundant Communication: HSR/PRP Ethernet redundancy for reliable, zero‑switchover communication in critical substationseero.
- Plug‑and‑Play: Hot‑swap withdrawable design for easy installation, replacement, and maintenance without system shutdowneero.
- Web‑Based HMI: Remote access via web browser for real‑time monitoring, configuration, and diagnosticseero.
- Remote I/O Expansion: Compatible with ABB RIO600 remote I/O modules for scalable I/O capacity in large feeder configurationseero.
Reliability & Durability
- EMC Compliance: Meets strict IEC 61000 standards for immunity to electrical noise and electromagnetic interferenceeero.
- Galvanic Isolation: Full isolation between analog inputs, digital I/O, communication ports, and internal circuits to eliminate ground loopseero.
- Industrial‑Grade Components: Designed for stable operation in extreme temperatures, humidity, and harsh industrial environmentseero.
- DNV Certification: Optional DNV approval for marine and offshore applicationseero.
Application Scenarios
Utility Distribution Substations
- Feeder Protection: Primary protection for overhead lines, cable feeders, and incoming/outgoing feeders in urban/rural distribution networksABB.
- Compact Substations: Ideal for ring main units (RMUs), kiosk substations, and space‑constrained switchgear installationseero.
- Meshed Networks: Directional protection for looped and meshed distribution systems with high DG penetrationeero.
- Busbar Protection: High‑impedance busbar backup protection for medium‑voltage busbarseero.
- Capacitor Bank Control: Protection and control for medium‑voltage capacitor banks in distribution substationseero.
Industrial Power Systems
- Manufacturing: Protection for medium‑voltage motor feeders, conveyor systems, and process power circuits in steel, chemical, and paper industries.
- Mining & Minerals: Reliable operation in underground and surface mine distribution networks with harsh environmental conditions.
- Oil & Gas: Certified for refineries, petrochemical plants, and offshore platformseero.
- Marine & Offshore: DNV‑approved protection for shipboard and offshore wind farm power systemseero.
Power Generation & Renewable Energy
- Auxiliary Power: Protection for medium‑voltage auxiliary feeders in thermal, hydro, and renewable power plants.
- Wind/Solar Farms: Integration into medium‑voltage collector grids for wind and solar installations; supports LVRT and anti‑islanding protection.
- Distributed Generation: Protection for grid‑connected DG units (solar, wind, microturbines, biomass) at point of common coupling (PCC)eero.
Infrastructure & Critical Facilities
- Water & Wastewater: Protection for pump stations and treatment plant medium‑voltage distribution systems.
- Data Centers: Reliable feeder protection for mission‑critical power systems with zero‑tolerance for downtime.
- Railways & Transportation: Protection for traction power distribution networks in urban rail and mass transit systems.
- Commercial Complexes: Protection for medium‑voltage feeders in large commercial buildings, hospitals, and airports.
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