Product Short Description
Product Introduction
The ABB REF6515 is a high‑performance, advanced intelligent electronic device (IED) from ABB’s Relion® 650 series, purpose‑built for comprehensive protection, control, measurement, and supervision of medium‑voltage (3 kV–40.5 kV) feeders in utility and industrial power distribution systems. It serves as a primary protection solution for radial, looped, and meshed networks, including systems with high penetration of distributed generation (DG), across isolated neutral, resistance‑earthed, compensated, and solidly‑earthed configurations. The REF6515 integrates cutting‑edge protection algorithms, robust I/O capacity, and high‑speed redundant communication in a compact, withdrawable plug‑in design, enabling easy installation, commissioning, and maintenance.
Description
Technical Specifications
| Parameter | Detail |
|---|---|
| Manufacturer | ABB |
| Model | REF6515 |
| Product Type | Medium‑Voltage Feeder Protection and Control IED |
| Application Voltage | 3 kV–40.5 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 | < 20 W (typical) |
| Processor | High‑speed multi‑core DSP for real‑time protection and control |
| Analog Inputs | 6 high‑precision AC inputs (3 phase currents + 1 residual current + 2 phase voltages); configurable for 1 A / 5 A CTs |
| Digital Inputs | 32 galvanically isolated dry‑contact inputs; expandable via optional I/O modules |
| Digital Outputs | 20 configurable outputs; includes heavy‑duty trip contacts and signal contacts; expandable via optional I/O modules |
| Communication Interfaces | Dual Ethernet (10/100/1000 Mbps) with HSR/PRP redundancy; RS‑485; optional fiber optic ports |
| 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 |
| Time Synchronization | IEEE 1588 PTP V2 (< 1 µs accuracy), IRIG‑B, SNTP |
| HMI | Large graphical LCD display; customizable single‑line diagrams (SLDs); 16 programmable LEDs; 20 configurable pushbuttons; local/remote mode switch |
| 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 | Compact form factor (standard IED size) |
| Weight | Approx. 5.8 kg |
| Certifications | KEMA type‑test certified, CE, IEC 61000, RoHS, UL, DNV (optional) |
| MTBF | ≥ 200,000 hours (IEC 61709 compliant) |
Functional Features
Comprehensive Protection Functions
- Overcurrent Protection: Six‑stage directional/non‑directional phase overcurrent (50/51) with definite‑time, IDMT, and instantaneous characteristics; negative‑sequence overcurrent protection.
- 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 protection.
- Thermal Overload Protection: Real‑time thermal modeling for cables and overhead lines to prevent overheating and insulation degradation.
- 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) protection.
- Arc‑Fault Protection: Four light‑sensor channels for fast arc detection in switchgear; high‑speed tripping (< 1 ms) to minimize equipment damage.
- Breaker Failure Protection (CBFP): Backup tripping initiation for main breaker fault clearance failure.
- Auto‑Reclosing: Configurable 1–5 shot multi‑pole auto‑reclose (79) for rapid restoration after transient faults on overhead lines.
- Fault Location: Impedance‑based short‑circuit and earth‑fault location for radial and looped networks.
- Phase Discontinuity Protection: Detects broken conductors and phase imbalance to protect connected loads.
- Interconnection Protection: Reverse power/directional overpower, voltage vector shift, low‑voltage ride‑through (LVRT), and anti‑islanding protection for distributed generation integration.
- Busbar Protection: High‑impedance busbar protection for medium‑voltage busbars.
- Capacitor Bank Protection: Overload, unbalance, and resonance protection for single‑star and double‑star connected capacitor banks.
- Motor Protection: Advanced motor protection (overload, stall, phase imbalance, short‑circuit) for motor feeders.
Control & Automation
- Local/Remote Control: Manual and SCADA‑based control of up to 5 circuit breakers, 8 disconnectors, and 5 earthing switches via digital outputs.
- Configurable Logic: User‑programmable logic (PLC‑like) for custom interlocking, automation sequences, and control logic.
- Setting Groups: 16 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 upkeep.
- Synchro‑Check: Verifies voltage, phase angle, and frequency conditions for safe network interconnection.
- Current/Voltage Circuit Supervision: Detects CT/VT secondary circuit faults and blocks protection functions to prevent misoperation.
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: 10,000 sequence‑of‑events (SOE) logs with microsecond‑precision timestamps; 24 analog + 128 binary channels disturbance recorder (512 cycles per record) in COMTRADE format.
- Load Profile Recording: Records up to 24 selectable load quantities for over 2 years, supporting long‑term load analysis.
- Power Quality Monitoring: Measures total harmonic distortion (THD), voltage sags/swells, and voltage unbalance.
- 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 operation.
Communication & Integration
- IEC 61850 Compliance: Full support for MMS, GOOSE, and process bus (IEC 61850‑9‑2 LE) for digital substation interoperability and reduced wiring.
- Redundant Communication: HSR/PRP Ethernet redundancy for reliable, zero‑switchover communication in critical substations.
- Plug‑and‑Play: Hot‑swap withdrawable design for easy installation, replacement, and maintenance without system shutdown.
- Web‑Based HMI: Remote access via web browser for real‑time monitoring, configuration, and diagnostics.
- Remote I/O Expansion: Compatible with ABB RIO600 remote I/O modules for scalable I/O capacity in large feeder configurations.
Reliability & Durability
- EMC Compliance: Meets strict IEC 61000 standards for immunity to electrical noise and electromagnetic interference.
- Galvanic Isolation: Full isolation between analog inputs, digital I/O, communication ports, and internal circuits to eliminate ground loops.
- Industrial‑Grade Components: Designed for stable operation in extreme temperatures, humidity, and harsh industrial environments.
- DNV Certification: Optional DNV approval for marine and offshore applications.
Application Scenarios
Utility Distribution Substations
- Feeder Protection: Primary protection for overhead lines, cable feeders, and incoming/outgoing feeders in urban/rural distribution networks.
- Compact Substations: Ideal for ring main units (RMUs), kiosk substations, and space‑constrained switchgear installations.
- Meshed Networks: Directional protection for looped and meshed distribution systems with high DG penetration.
- Busbar Protection: High‑impedance busbar backup protection for medium‑voltage busbars.
- Capacitor Bank Control: Protection and control for medium‑voltage capacitor banks in distribution substations.
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 platforms.
- Marine & Offshore: DNV‑approved protection for shipboard and offshore wind farm power systems.
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).
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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