Description
1. Product Overview
ABB REF615C_E (Full Order Code: HCFDACADABC2BAN11E) is a mid-to-high-end enhanced intelligent feeder protection and control IED within the ABB Relion® 615 series. It is custom-developed for 10 kV/35 kV smart distribution networks, industrial auxiliary power systems and urban ring network self-healing distribution systems featuring renewable energy interconnection, drastic load fluctuation, complex electromagnetic environment and stringent power supply reliability requirements. Upgraded from the standard version with optimized protection algorithms, sampling performance and communication architecture, the device integrates a full suite of high-precision feeder protection, intelligent circuit breaker management, advanced Feeder Automation (FA), refined power quality monitoring, comprehensive equipment self-supervision, high-speed redundant communication, full-process fault tracing and other all-in-one functions. It serves as core secondary equipment for digitalization, self-healing transformation and reliability improvement of new-generation smart distribution systems.
This model adopts dedicated finalized configuration for REF615C_E. Differentiated from basic A-series models, it strengthens five core capabilities: harmonic-suppression sampling, bidirectional power flow adaption, precise power quality analysis, high-speed FA self-healing coordination and robust anti-interference hardware. It perfectly accommodates new distribution operating conditions with multi-point interconnection of distributed PV, energy storage and wind power, and effectively addresses industrial challenges induced by renewable energy integration including voltage fluctuation, excessive harmonics, bidirectional power flow transition and protection mal-operation. Its hardware allocation, protection logic and communication protocols fully comply with technical specifications for intelligent distribution equipment of State Grid and China Southern Power Grid. Supporting radial, ring and meshed network topologies, it can directly replace various legacy conventional protection devices. It is widely deployed at renewable energy grid-connection points, complex industrial distribution circuits, urban core power supply ring networks, intelligent switching stations and critical power guarantee projects.
Built upon ABB’s proven pluggable modular industrial hardware architecture, the IED is equipped with high-speed power-dedicated processors, high-precision synchronous sampling units and independent harmonic operation modules. It features accurate protection operation, rapid fault response, strong harmonic suppression, zero parameter drift during long-term operation and stable maintenance-free performance. It fully meets full-scenario engineering demands of new smart distribution networks for unattended operation, self-healing control, precise fault tracing and refined compliant maintenance.
2. Technical Features
2.1 Enhanced Comprehensive Feeder Protection Adaptable to Complex Renewable Energy Conditions
Adopting advanced ABB feeder protection logic covering all typical fault scenarios on medium-voltage feeders, it integrates complete functions including three-stage overcurrent protection, directional overcurrent protection, high-sensitivity earth fault protection, zero-sequence protection, negative-sequence overcurrent protection, anti-islanding protection, voltage/frequency anomaly protection, overload and thermal protection, three-phase unbalance protection and adaptive auto-reclosing. Protection criteria are optimized against harmonic interference, abrupt load change and bidirectional power flow fluctuation arising from renewable energy integration. With powerful operating condition adaptability, it accurately distinguishes system faults from renewable energy disturbances, fundamentally eliminating protection mal-operation, failure to trip and selective tripping failures. Its protection accuracy and stability outperform conventional standard protection devices.
2.2 High Harmonic Immunity Precision Sampling and Refined Power Quality Monitoring
Equipped with an independent harmonic analysis unit and adaptive harmonic filtering algorithm, it effectively filters high-frequency harmonic interference generated by renewable energy interconnection, variable frequency equipment and impact loads to guarantee accuracy of fault sampling and electrical measurement. It supports monitoring of full-range power quality indicators including 2nd~31st harmonic contents, voltage fluctuation, frequency deviation, three-phase unbalance and voltage flicker. It can automatically generate power quality trend reports, abnormal alarm records and extreme value statistics to precisely locate power quality defects in distribution networks, providing core data support for harmonic mitigation, setting optimization and equipment hazard detection, catering to refined management requirements of smart grids.
2.3 Bidirectional Power Flow Adaptability for Renewable Energy Grid Connection
Embedded with dedicated bidirectional power flow identification and adaptive protection algorithms, it identifies forward and reverse power flow switching conditions in real time and dynamically adapts to complex operating states such as power flow offset, voltage rise and load fluctuation brought by renewable energy integration. Integrated with high-sensitivity anti-islanding protection with island fault clearing time ≤200 ms, it rapidly isolates hidden risks of islanded operation of renewable energy sources. It thoroughly solves poor protection adaptability and unstable operation problems in high-penetration renewable energy distribution networks and fully complies with domestic technical specifications for renewable energy grid-connected distribution.
2.4 High-Speed FA Self-Healing Control to Improve Power Supply Reliability
Integrated with advanced FA self-healing logic, relying on GOOSE high-speed peer-to-peer communication technology, it realizes fully automatic unattended handling including accurate fault location, instantaneous isolation and rapid power restoration in non-fault sections on distribution lines. Fault section isolation time ≤100 ms, and load transfer and power restoration time for healthy sections ≤300 ms. It minimizes power outage scope and duration, supports maintenance without power cut, grid reconfiguration and intelligent load regulation, adapting to unattended operation modes of urban ring networks and industrial park self-healing distribution networks.
2.5 Full-Protocol Compatible Communication with Stable Networking and Strong Scalability
Fitted with high-performance industrial communication interfaces, it fully supports mainstream power protocols including IEC 61850 Ed2, GOOSE, IEC 60870-5-103, Modbus RTU/TCP, DNP3 and IEEE 1588 precision time synchronization, and accommodates multiple networking architectures. The communication link boasts strong anti-interference capability and low transmission latency. It seamlessly connects with various substation automation systems, distribution automation platforms and power dispatching backends, realizing real-time uploading of four-remote data, millisecond-level push of fault messages, remote parameter setting and logic commissioning, featuring excellent stability, compatibility and expandability for networking.
2.6 Pluggable Modular Hardware for Convenient Maintenance and Wide Adaptability
Based on ABB standardized industrial pluggable modular architecture, power supply, sampling, I/O and communication modules are arranged in independent partitions without mutual interference. Individual modules can be hot-swapped without powering off the whole unit, modifying secondary wiring or reconfiguring programs. The dedicated I/O allocation of HCFDACADABC2BAN11E fully matches standard wiring specifications of domestic 10 kV/35 kV switchgears and ring main units. High hardware universality and interchangeability facilitate in-situ replacement of legacy equipment, system expansion and intelligent technical retrofits, greatly reducing engineering construction and long-term maintenance costs.
2.7 Comprehensive Self-Supervision and Tracing System with High Compliance
Equipped with a high-resolution Chinese LCD local HMI, it supports on-site parameter setting, real-time data monitoring, fault inquiry, event browsing and circuit commissioning. Built-in integrated hardware and software full-range self-supervision continuously monitors operating status of power supply, sampling circuits, I/O ports, communication links and program operation 24/7, and triggers both local and remote active alarms upon abnormalities. SOE records, fault oscillography, operation logs and power quality data are persistently stored to retain full-lifecycle operating data of the device, fully meeting standardized requirements of power industry for fault tracing, project acceptance, compliance filing and condition-based maintenance.
3. Technical Specifications
3.1 Basic Specifications
Model: REF615C_E Full Order Code: HCFDACADABC2BAN11E Brand: ABB Series: Enhanced Industrial Version of Relion® 615 Series Device Type: Medium-Voltage Intelligent Feeder Protection and Control IED (Enhanced Type for Renewable Energy) Core Positioning: Comprehensive protection for complex feeders, bidirectional power flow management, renewable energy grid-connected protection, refined power quality analysis, high-speed FA self-healing, intelligent circuit breaker control, full-process fault tracing, stable redundant communication Application Scope: 10 kV/35 kV distribution networks with renewable energy interconnection, urban intelligent self-healing ring networks, complex industrial auxiliary power systems, critical power guarantee circuits, intelligent upgrade of legacy distribution systems, new construction of intelligent switching stations Hardware Characteristics: Plug-and-play modular structure, high harmonic immunity sampling, independent power quality operation chip, industrial-grade anti-interference hardware, highly stable communication modules Core Advantages: Excellent adaptability to renewable energy, outstanding harmonic suppression, accurate protection operation, fast self-healing speed, zero parameter drift during operation, convenient maintenance, stable performance under all operating conditions
3.2 Protection Function Specifications
Main Protection Functions: Three-stage overcurrent protection (instantaneous overcurrent, definite time delayed overcurrent, long time overcurrent), directional overcurrent protection, zero-sequence overcurrent protection, high-sensitivity earth fault protection, negative-sequence overcurrent protection, anti-islanding protection for renewable energy (trip within ≤200 ms), bidirectional power flow anomaly protection Backup Protection: Overvoltage protection, undervoltage protection, overload protection, thermal protection, under-frequency load shedding, over-frequency protection, three-phase unbalance protection, voltage-frequency interlock protection Auxiliary Protection: Circuit breaker failure protection, adaptive line auto-reclosing, fault blocking protection, soft-start blocking, trip circuit supervision, harmonic over-limit protection, circuit anomaly supervision Protection Accuracy: Setting error of current/voltage protection ≤ ±1.5%; operating time error ≤ ±20 ms Operating Characteristics: Supports both definite time and inverse time modes with customizable protection curves for coordination of multi-level power networks Self-Healing Performance: FA accurate fault isolation ≤100 ms; power restoration for non-fault sections ≤300 ms Fault Tolerance: Adaptive to renewable energy harmonic interference, abrupt load variation, bidirectional power flow switching and industrial strong electromagnetic interference to avoid protection mal-operation and failure to trip
3.3 Measurement and Power Quality Specifications
Conventional Measured Quantities: Three-phase currents, three-phase voltages, active power, reactive power, apparent power, power factor, system frequency, three-phase unbalance factor, accumulated energy, real-time monitoring of bidirectional power flow direction Power Quality Monitoring: 2nd~31st harmonic contents, voltage fluctuation, frequency deviation, voltage flicker, three-phase unbalance rate, power quality extreme value recording, operation trend analysis Measurement Accuracy: Current and voltage ±1.5%; power and energy ±2.0%; frequency ±0.01 Hz Sampling Characteristics: High-speed synchronous sampling plus adaptive harmonic filtering algorithm, precisely applicable to complex operating conditions including steady state, dynamic impact load, bidirectional power flow and strong harmonic disturbance Data Statistics: Daily/monthly/yearly energy accumulation, load curve storage, automatic generation of power quality reports, persistent storage of abnormal data
3.4 Communication and Interface Specifications
Communication Protocols: IEC 61850 Ed2, GOOSE, IEC 60870-5-103, Modbus RTU/TCP, DNP3, IEEE 1588 network time synchronization protocol Communication Interfaces: Standard Gigabit Ethernet port, extended RS485/RS232 serial interfaces Network Topologies: Single-network networking, GOOSE peer-to-peer networking, bus networking compatible with architectures of intelligent self-healing grids and conventional substations Data Transmission: Real-time uploading of four-remote data, power quality data and equipment status information; remote reception of remote control and remote adjustment commands; millisecond-level push of fault messages, oscillography files and alarm information Commissioning Interfaces: Dedicated local service port, remote web commissioning port supporting online configuration, parameter modification, logic verification, oscillography export and data analysis
3.5 Power Supply Specifications
Operating Power: Wide-range universal AC/DC power supply Input Range: 80%～120% of rated voltage, tolerating regular grid fluctuations, transient voltage surges and short power interruptions Power Circuit Features: Built-in surge, ESD, overvoltage and overcurrent protection circuits suitable for fluctuating grids with renewable energy and complex industrial conditions Power Consumption: Low overall power design with low temperature rise and no power consumption drift or parameter offset during long-term operation Supply Stability: No restart or data loss under transient grid disturbances and short power outages; communication links recover rapidly after power restoration
3.6 I/O and Control Specifications
Digital Inputs: Multiple passive galvanically isolated DI channels collecting circuit breaker position, spring charged status, local/remote selector status, equipment alarms, interlock status and grid operating signals Digital Outputs: Multiple relay DO channels for circuit breaker tripping/closing drive, fault trip output, equipment alarm, system interlock linkage and FA self-healing control output Control Functions: Local manual control, remote control, customizable logic interlocks, adaptive auto-reclosing, FA self-healing coordination, fault lockout, interlock under bidirectional power flow conditions I/O Characteristics: Galvanic isolation on all ports for anti-interference and anti-false triggering, adapted to strong electromagnetic sites with renewable energy and industrial loads Interlock Logic: User-configurable multi-channel I/O blocking and interlock logic applicable to complex operating conditions of ring networks and renewable energy grid connection
3.7 Environmental Specifications
Operating Temperature: -25℃ ~ +55℃ Storage Temperature: -40℃ ~ +85℃ Operating Humidity: 5%～95%RH (non-condensing, no corrosive gas) Electromagnetic Compatibility: Complies with IEC 61000 series industrial EMC standards, resistant to strong electromagnetic radiation, high-frequency harmonics, electrostatic discharge and voltage disturbance Mounting Type: Standard embedded cabinet mounting Device Weight: Approx. 2.5 kg Operation Mode: Unattended continuous 7×24-hour stable operation all year round
4. Operating Principle
The ABB REF615C_E HCFDACADABC2BAN11E enhanced feeder protection and control IED takes a high-performance power-dedicated main controller as its core. Integrated with independent harmonic analysis units, high-precision synchronous sampling units, high-speed FA self-healing operation units and stable communication processing units, it realizes integrated intelligent operation of medium-voltage feeder protection, power quality monitoring, intelligent control, grid self-healing and fault tracing via renewable energy dedicated adaptive protection algorithms, harmonic filtering technology, bidirectional power flow identification logic and GOOSE high-speed coordination mechanism. Upon power-on, the device automatically executes comprehensive hardware self-test, sampling circuit verification, I/O initialization, communication protocol matching, loading of protection logic and self-healing programs, and rapidly enters standby status to ensure fault-free startup and coordinated stable operation of all functional modules.
During normal operation, high-speed synchronous sampling circuits continuously collect fundamental electrical quantities including feeder three-phase currents, three-phase voltages and system frequency. After eliminating on-site harmonic interference by adaptive harmonic filtering algorithms, core operating parameters such as power, energy, power flow direction, harmonic contents and three-phase unbalance factor are accurately calculated, and real-time statistics and trend analysis of power quality indicators are conducted simultaneously. The local HMI intuitively displays real-time operating data, equipment status and alarm information to facilitate on-site inspection, setting verification and field commissioning. Meanwhile, four-remote data, power quality data and equipment status are uploaded in real time to background systems via high-speed communication links to realize all-round digitalized, visualized and refined management of distribution circuits. The device continuously monitors status signals of circuit breakers, spring charging and local/remote modes, and strictly executes preset interlock and blocking logic to adapt to complex operating conditions of bidirectional power flow with renewable energy.
When faults such as short circuit, overload, earth leakage, voltage/frequency anomaly, three-phase unbalance, islanded operation, excessive harmonics and power flow disorder occur on feeders, the IED instantly triggers corresponding adaptive protection logic to accurately identify fault type, magnitude and duration, and rapidly outputs trip commands to isolate faults. Island faults of renewable energy can be cleared within 200 ms to effectively avoid grid safety risks. Upon fault occurrence, the high-speed FA self-healing system is activated synchronously. Coordinated with adjacent IEDs through GOOSE high-speed peer-to-peer communication, it accurately isolates fault sections within 100 ms and completes load transfer and power restoration for non-fault areas within 300 ms to minimize power outage scope and improve power supply reliability. Fault recording, SOE sequential event logging, fault message storage and retention of power quality abnormal data are automatically enabled to fully record whole-process fault data, providing accurate basis for fault review, hidden danger investigation, harmonic mitigation and protection setting optimization.
In daily operation and maintenance, the device supports local manual operation, remote circuit breaker control, online parameter setting and logic commissioning. Relying on comprehensive hardware and software self-supervision, it monitors equipment operating status 24/7 and actively reports hidden hazards including hardware anomalies, circuit failures and communication disturbances, fully safeguarding safe, stable, self-healing and long-term maintenance-free operation of high-penetration renewable energy smart distribution networks and complex industrial distribution systems.
5. Application Scenarios
5.1 Distribution Systems with High-Penetration Renewable Energy Interconnection
Specially applicable to 10 kV/35 kV multi-point grid-connected distribution circuits of PV, wind power and energy storage. Supported by bidirectional power flow adaptive protection, high-sensitivity anti-islanding, harmonic suppression and power quality monitoring functions, it effectively addresses industrial difficulties including island risks, voltage fluctuation, excessive harmonics, power flow disorder and protection mal-operation caused by renewable energy integration. It ensures safe grid connection and stable consumption of renewable energy, and meets refined operation and power quality control requirements of the new power system.
5.2 Urban Intelligent Self-Healing Ring Distribution Systems
Adaptable to intelligent ring circuits and sectionalizing tie circuits in urban core areas and industrial parks. With high-speed FA self-healing control, it realizes automatic accurate fault location, rapid isolation and automatic power restoration for healthy sections without manual intervention, greatly shortening outage duration and reducing outage scope. It adapts to unattended intelligent distribution operation modes and significantly improves power supply reliability of urban distribution networks.
5.3 Complex Industrial Auxiliary Power Systems with Bidirectional Power Flow
Suitable for grid-connected circuits of self-owned power plants, waste heat power generation and on-site distributed PV in metallurgy, chemical, manufacturing and other industrial enterprises. Aiming at industrial operating characteristics including drastic load fluctuation, abundant impact loads, severe harmonics, frequent bidirectional power flow switching and complex electromagnetic environment, it guarantees continuous safe production of enterprises and avoids production losses due to power outages via stable adaptive protection logic and strong anti-interference capability. It also provides data support for on-site power quality treatment and equipment hazard detection.
5.4 Intelligent Distribution Circuits for Critical Power Guarantee
Widely deployed in high-reliability power guarantee scenarios such as data centers, hospitals, municipal core loads and transportation hubs. With accurate and stable protection performance, millisecond-level fault handling capability and comprehensive fault tracing system, it rapidly handles various electrical faults to maximize uninterrupted power supply for critical loads, meeting high reliability, safety and traceability operation requirements of key scenarios.
5.5 Refined Compliance Operation Scenarios for Smart Grids
Relying on complete functions of power quality statistics, load trend analysis, SOE sequential recording, fault oscillography and operation log storage, it accumulates full-dimensional operating data of distribution systems in the long run. It perfectly fits refined operation demands of smart grids such as condition-based maintenance, hazard prediction, power quality treatment and setting optimization, and fully satisfies standardized requirements of power industry for project acceptance, compliance filing and fault tracing.
