Description
1. Product Overview
ABB REF615A_1G (Full Order Code: HAFNAEFCBGC1BQK11G) is a standard industrial-grade intelligent feeder protection and control IED within the ABB Relion® 615 series. It is an integrated secondary protection and control device tailor-made for 10 kV/35 kV conventional distribution networks, industrial auxiliary power systems, municipal feeders and sectionalizing circuits of ring main units. The device integrates full proven feeder relay protection, high-precision electrical measurement, intelligent circuit breaker control, sequence-of-event recording, fault oscillography, equipment self-supervision, standardized power communication and other core basic functions. Featuring stable structure, mature logic and outstanding versatility, it serves as a mainstream standard model for intelligent retrofitting of traditional distribution networks, new conventional distribution projects and replacement of legacy equipment.
This model adopts the standard fixed configuration of REF615A_1G. Its hardware, software, I/O allocation and protection logic fully comply with technical specifications for conventional distribution equipment of State Grid and China Southern Power Grid of China. Without redundant advanced functions, it highlights high stability, wide versatility, maintenance-free operation, easy commissioning and cost-effectiveness. It is applicable to traditional medium-voltage distribution scenarios with conventional loads, no large-scale renewable energy interconnection and stable operating conditions. Supporting radial and ring network topologies, it can perfectly replace various domestic and imported conventional feeder protection and control devices, meeting construction and retrofitting demands of most standardized distribution projects in industrial, municipal and park areas.
The IED strictly complies with international IEC power standards and has obtained IEC 61508 SIL3 functional safety certification, IEC 61850 Ed2 protocol certification and full-range industrial EMC certification. Adopting ABB’s mature standardized modular hardware architecture, it is equipped with industrial high-speed processors and high-precision synchronous sampling units. It delivers reliable protection logic, stable sampling performance and zero parameter drift during long-term operation, featuring strong anti-interference capability, ultra-low failure rate, simple commissioning and maintenance and wide adaptability. It fully satisfies engineering requirements for long-term stable operation, safety and compliant maintenance of conventional distribution networks.
2. Technical Features
2.1 Comprehensive Standard Feeder Protection with Mature and Stable Logic
Equipped with classic proven ABB feeder protection algorithms covering all typical fault conditions of medium-voltage feeders, it provides core functions including graded overcurrent protection, earth fault protection, voltage/frequency anomaly protection, overload and thermal protection, three-phase unbalance protection and auto-reclosing. With standardized protection curves, simple setting configuration and stable operating characteristics, it enables excellent coordination for multi-level distribution networks. Free of redundant special functions, it boasts low failure rate and mature operation experience suitable for conventional stable distribution conditions, effectively preventing protection mal-operation, failure to trip and selective tripping malfunctions.
2.2 High-Precision Measurement of All Electrical Quantities with Traceable Data
It supports high-precision collection and statistics of comprehensive basic electrical quantities including three-phase currents, three-phase voltages, power, energy, frequency, power factor and three-phase unbalance factor. The sampling algorithm has been verified in numerous projects with high measurement accuracy and minor data fluctuation under steady-state conditions. It enables real-time monitoring of feeder load, voltage quality and system frequency, and automatically records daily, monthly and annual energy data as well as operational extreme values. It provides accurate data support for load analysis, energy consumption statistics, operational evaluation and fault tracing of distribution systems to meet refined maintenance requirements of conventional power grids.
2.3 Standard Basic FA Self-Healing Adaptable to Conventional Ring Network Operation
Embedded with basic feeder automation (FA) logic, it supports fault location, fault isolation and power restoration for non-fault sections on conventional ring feeders and sectionalizing circuits. Multi-device coordination is realized via standard GOOSE communication to satisfy basic self-healing demands of conventional urban distribution networks and industrial park ring networks. It effectively improves power supply reliability of conventional feeders and adapts to standardized unattended distribution operation modes.
2.4 Universal Multi-Protocol Communication Compatible with Various Substation Automation Systems
Fitted with standard industrial communication interfaces, it fully supports mainstream power protocols including IEC 61850 Ed2, GOOSE, IEC 60870-5-103 and Modbus RTU/TCP. Compatible with single-network, bus and peer-to-peer networking modes, it seamlessly connects with mainstream domestic substation automation systems, distribution automation platforms and power dispatching systems. It realizes real-time uploading of four-remote data, remote parameter setting, remote switching control and active push of fault messages with outstanding standardized compatibility.
2.5 Standardized Modular Hardware for Wide Versatility and Convenient Maintenance
Based on ABB’s standardized pluggable modular architecture, power supply, sampling, I/O and communication modules are arranged in independent partitions with compact stable structure and low failure rate. Individual modules can be replaced without powering off the whole unit, modifying secondary wiring or reconfiguring programs. The dedicated I/O allocation of HAFNAEFCBGC1BQK11G fully matches standard wiring specifications of mainstream domestic 10 kV/35 kV switchgears and ring main units. High hardware interchangeability facilitates compatible replacement between new and legacy distribution systems and significantly reduces construction and long-term maintenance costs.
2.6 Rigorous Industrial-Grade Protection Suitable for Full Range of Conventional Site Conditions
The unit has passed complete IEC 61000 EMC tests, temperature cycling aging, vibration shock and humidity cycling industrial tests. Front panel protection class reaches IP54 and terminal block protection class IP20, delivering excellent dustproof, moisture-proof, seismic and anti-electromagnetic interference performance. Free of mechanically wearable components, it features low power consumption and low temperature rise, supporting continuous unattended 7×24-hour operation all year round. It can operate steadily in conventional indoor power rooms, outdoor switch stations and standard industrial distribution sites.
2.7 User-Friendly HMI, Comprehensive Self-Supervision and High Compliance
It integrates a high-resolution local Chinese LCD HMI for on-site parameter viewing, setting adjustment, real-time data monitoring, fault inquiry and event browsing with simple operation. Built-in full-range equipment self-supervision continuously monitors operating status of power supply, sampling circuits, I/O ports and communication links around the clock and triggers active alarms upon abnormalities. SOE records, fault oscillography and operation logs are stored persistently, fully meeting standardized requirements of the power industry for fault tracing, project acceptance and compliance filing.
3. Technical Specifications
3.1 Basic Specifications
Model: REF615A_1G Full Order Code: HAFNAEFCBGC1BQK11G Brand: ABB Series: Standard Industrial Version of Relion® 615 Series Device Type: Medium-Voltage Intelligent Feeder Protection and Control IED (Standard Conventional Type) Core Positioning: Complete feeder protection, precise electrical measurement, intelligent circuit breaker control, basic FA self-healing, standardized communication and maintenance, fault tracing and recording Application Scope: 10 kV/35 kV conventional municipal distribution networks, stable distribution systems in industrial parks, industrial auxiliary power feeders, ring network sectionalizing and tie circuits, replacement of legacy conventional protection devices, standardized new distribution projects Hardware Characteristics: Standardized modular structure, high-precision synchronous sampling, stable industrial processors, universal communication configuration, high-reliability anti-interference hardware Core Advantages: Mature logic, stable operation, wide versatility, easy maintenance, cost-effectiveness, zero long-term parameter drift, adaptable to all conventional operating conditions
3.2 Protection Function Specifications
Main Protection Functions: Three-stage overcurrent protection (instantaneous overcurrent, definite time delayed overcurrent, long time overcurrent), residual overcurrent protection, high-sensitivity earth fault protection, negative sequence overcurrent protection, directional overcurrent protection Backup Protection: Overvoltage protection, undervoltage protection, overload protection, thermal protection, under-frequency load shedding, over-frequency protection, three-phase unbalance protection, voltage anomaly interlock protection Auxiliary Protection: Circuit breaker failure protection, line auto-reclosing, fault blocking, soft-start blocking, circuit supervision, trip circuit 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 standard protection curves for coordination of multi-level power networks Self-Healing Performance: Basic FA fault location, isolation and power restoration coordination to satisfy self-healing requirements of conventional ring networks Fault Tolerance: Adaptable to conventional load fluctuation and minor grid disturbance for stable operation without frequent mal-operation
3.3 Measurement Accuracy Specifications
Measured Quantities: Three-phase currents, three-phase voltages, active power, reactive power, apparent power, power factor, system frequency, three-phase unbalance factor, accumulated energy, operational extreme value statistics Measurement Accuracy: Current and voltage ±1.5%; power and energy ±2.0%; frequency ±0.01 Hz Sampling Characteristics: High-speed synchronous sampling plus standard filtering algorithm suitable for steady-state and slightly fluctuating conventional distribution operating conditions Data Statistics: Daily/monthly/yearly energy accumulation, load curve storage, operation trend analysis and persistent storage of abnormal data
3.4 Communication and Interface Specifications
Communication Protocols: IEC 61850 Ed2, GOOSE, IEC 60870-5-103, Modbus RTU/TCP, IEEE 1588 time synchronization protocol Communication Interfaces: Standard Gigabit Ethernet port, extended RS485/RS232 serial ports Network Topologies: Single-network networking, GOOSE peer-to-peer networking, bus networking compatible with conventional substation architecture Data Transmission: Real-time uploading of telemetry and telesignalling data, equipment status information; remote reception of remote control and remote adjustment commands; active push of fault messages, event alarms and oscillography data Commissioning Interfaces: Dedicated local service port, remote web commissioning port supporting online configuration, parameter modification, logic verification and oscillography export
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 and transient voltage surges Power Circuit Features: Built-in surge, ESD, overvoltage and overcurrent protection circuits suitable for conventional grid conditions Power Consumption: Low overall power design with low temperature rise and stable performance without drift during long-term operation Supply Stability: No restart or data loss under transient grid fluctuations and short power interruptions; rapid recovery after power restoration
3.6 I/O and Control Specifications
Digital Inputs: Multiple passive galvanically isolated DI channels for circuit breaker position, spring charged status, local/remote selector, 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 and FA self-healing control output Control Functions: Local manual control, remote control, standard logic interlocks, auto-reclosing, conventional FA self-healing coordination, fault lockout I/O Characteristics: Galvanic isolation on all ports for anti-interference and anti-false triggering, adapted to electromagnetic environment of conventional distribution systems Interlock Logic: User-configurable basic I/O blocking and interlock logic applicable to conventional ring feeders and sectionalizing circuits
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 conventional electromagnetic interference, electrostatic discharge and voltage disturbance Protection Class: Front panel IP54; terminal area IP20 Mounting Type: Standard embedded cabinet mounting Device Weight: Approx. 2.5 kg Operation Mode: Unattended continuous 7×24-hour stable operation all year round Compliance Standards: Conforms to international IEC power standards and technical specifications for intelligent distribution equipment of State Grid and China Southern Power Grid
4. Operating Principle
The ABB REF615A_1G HAFNAEFCBGC1BQK11G standard feeder protection and control IED takes an industrial power-dedicated main controller as its core. Supported by standardized high-precision synchronous sampling technology, classic feeder protection algorithms, basic FA self-healing logic and general communication processing programs, it realizes integrated stable operation of medium-voltage feeder protection, measurement, control, communication and fault tracing. Upon power-on, the unit automatically executes comprehensive hardware self-test, sampling circuit verification, I/O initialization, communication protocol matching, system parameter and protection logic loading, and rapidly completes initialization and standby status to ensure fault-free startup and smooth communication links.
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 standard filtering processing, core operating parameters such as power, energy and unbalance factor are accurately calculated to monitor feeder load and grid operating conditions. On one hand, the local LCD displays real-time data, equipment status and alarm information for on-site inspection, commissioning and setting verification. On the other hand, four-remote data and equipment status are uploaded in real time to background systems via standard communication links to realize remote visualized and digital monitoring of distribution circuits. Meanwhile, circuit breaker position, spring charged status and local/remote signals are continuously collected, and preset interlock and blocking logic are strictly executed to guarantee stable operation of distribution systems.
When conventional faults such as short-circuit, overload, earth leakage, voltage anomaly, frequency deviation and three-phase unbalance occur on feeders, the IED instantly triggers corresponding standardized protection logic, accurately identifies fault type, magnitude and duration, and rapidly outputs trip commands according to preset settings and time delays to reliably isolate fault sections and prevent fault escalation leading to large-area power outages. Upon fault occurrence, fault recording, SOE sequential event logging and fault message storage are automatically activated. Complete waveforms, time sequences and parameter data throughout fault events are retained to support fault analysis, hidden danger investigation and setting optimization.
Under ring network operating conditions, coordinated with adjacent IEDs via basic FA feeder automation logic and GOOSE communication, the device realizes accurate fault location, fault section isolation and load transfer and power restoration for non-fault sections to effectively improve power supply reliability of distribution networks. For daily operation and maintenance, local manual control, remote circuit breaker control, online parameter setting and logic commissioning are supported. Comprehensive self-supervision monitors equipment status in real time and actively reports abnormal hazards, fully safeguarding safe, stable, long-term and maintenance-free operation of conventional medium-voltage distribution systems.
5. Application Scenarios
5.1 Power Supply Circuits of Conventional Municipal Distribution Networks
Widely applied to urban 10 kV/35 kV conventional overhead lines, cable feeders, urban sectionalizing and tie distribution circuits. Adaptable to stable municipal load conditions, it ensures safe and reliable operation of urban basic power supply networks relying on mature stable protection logic and precise measurement capability, and meets demands of standardized operation, fault tracing and compliance filing for municipal power grids.
5.2 Stable Distribution Systems in Industrial Parks
Applicable to medium-voltage distribution circuits of industrial parks, industrial zones and commercial complexes without large-scale renewable energy interconnection and with stable loads. It undertakes feeder protection, load monitoring, intelligent control and fault recording functions. Featuring stable operation and simple maintenance, it satisfies requirements for continuous stable power supply and standardized distribution management of parks.
5.3 Conventional Auxiliary Power Systems for Industrial Enterprises
Suitable for conventional plant feeders and workshop distribution circuits in metallurgy, manufacturing, chemical and other industrial enterprises. Aiming at characteristics including conventional load fluctuation and standard electromagnetic environment in industrial systems, it secures stable power supply for production and prevents production shutdown accidents caused by conventional electrical faults via reliable protection logic and strong anti-interference capability.
5.4 Self-Healing Scenarios for Ring Network Sectionalizing in Distribution Networks
Adaptable to conventional ring main units and sectionalizing switch circuits in cities and parks. Supported by basic FA self-healing functions, it realizes automatic fault isolation and power restoration of healthy sections, simplifies manual maintenance procedures, improves self-healing capability and power supply reliability of conventional distribution networks and adapts to unattended distribution operation modes.
5.5 Standardized New Distribution Projects
Fully applicable to standardized new 10 kV/35 kV distribution projects, small smart substations and switching station construction projects of State Grid and China Southern Power Grid. Its functions, parameters, communication and I/O configuration fully comply with industry standards without customized modification, ready for immediate commissioning and suitable for mass standardized project construction.
