Description
1. Product Overview
ABB REF615C-D (Order Code: HCFCACABANB2BAN1XD) is a high-performance intelligent feeder protection and control IED from the ABB Relion® 615 series. It is developed for medium-voltage feeders, cable circuits and ring network circuits in power substations, municipal distribution networks and self-owned power stations of industrial and mining enterprises. As a new-generation integrated core device for distribution automation, it integrates relay protection, precise electrical measurement, intelligent circuit breaker control, equipment condition monitoring, fault recording analysis and multi-protocol communication operation.
This unit is a dedicated customized configuration version of REF615C-D. Compared with standard models, it features optimized earth fault protection, harmonic adaptation and bidirectional power flow monitoring capabilities. It can perfectly adapt to complex distribution network operating conditions connected with distributed photovoltaic and wind power sources, and supports multiple networking modes including radial networks, ring networks and mesh networks.
The device strictly complies with international IEC power standards as well as technical specifications for distribution equipment issued by State Grid and China Southern Power Grid. It adopts an industrial-grade modular pluggable hardware architecture integrated with high-precision synchronous sampling chips, dedicated high-speed power processors and integrated multi-protocol communication units. It boasts core advantages such as accurate protection operation, fast fault response, strong anti-interference performance and zero drift during long-term operation.
The dedicated I/O and function configuration of HCFCACABANB2BAN1XD fully meets all scenarios of industrial and municipal medium-voltage power distribution. No additional secondary measurement, control or communication equipment is required, and it can directly replace legacy conventional protection devices in-situ. Widely applied for intelligent protection and control of 10 kV / 35 kV medium-voltage feeders, sectioning switches, tie switches and auxiliary power circuits, it serves as key equipment for digital upgrading of distribution networks, construction of new smart substations and technical transformation of legacy power distribution systems.
2. Technical Features
2.1 Full-Dimensional Integrated Functions for One-Stop Intelligent Feeder Management
The device integrates a complete set of professional feeder protection, measurement, control and operation functions, covering full relay protection logic including three-stage overcurrent, zero-sequence earth fault, negative-sequence, overvoltage & undervoltage, overload & thermal protection, under-frequency load shedding, etc. It also supports high-precision measurement of full electrical parameters such as three-phase voltage, current, power, energy, frequency, harmonics and three-phase unbalance factor.
Functions including local/remote circuit breaker switching control, circuit condition monitoring, live circuit alarm, abnormal interlock, fault recording, Sequence of Events (SOE) and operation trend statistics are available. It enables independent full-lifecycle intelligent management of feeder circuits, greatly simplifying the secondary wiring structure and lowering the operation and maintenance cost of the entire secondary equipment.
2.2 High-Precision Intelligent Protection Algorithm with Millisecond-Level Accurate Fault Isolation
Equipped with ABB self-developed dedicated high-speed power processor and optimized vector protection algorithm, the unit achieves top-tier industry sampling accuracy for current and voltage. Protection operates with precise time delays and minimal threshold setting error, thoroughly eliminating unwanted tripping, failure to trip and cascading tripping.
It can accurately identify transient short-circuit faults, permanent earth faults, intermittent leakage faults, load fluctuation disturbances and power flow fluctuations induced by grid-connected new energy sources. Compatible with graded protection coordination logic of multi-level distribution networks, it realizes rapid fault location and accurate isolation to minimize power outage scope and improve power supply reliability of distribution systems.
2.3 Full-Protocol Communication Compatibility Adaptable to Digital Smart Grids
Natively integrated with multi-channel redundant communication interfaces, it fully supports mainstream power communication protocols including IEC61850 Ed2, IEC60870-5-103, Modbus RTU/TCP and DNP3. Multiple transmission modes such as Ethernet, RS485/RS232 serial port and fiber communication are supported.
It can seamlessly connect to integrated automation systems of smart substations, distribution automation platforms, power dispatching backends and upper monitoring systems to realize remote parameter setting, remote circuit breaker control, real-time telemetry uploading, telesignal status collection, and active push of fault messages and recorded waveform data. It fully satisfies networking and operation requirements of digital and intelligent distribution networks.
2.4 Modular Pluggable Hardware for Convenient Maintenance and Excellent Compatibility
Adopting ABB’s mature modular pluggable structure, power supply modules, sampling modules, I/O signal modules and communication modules are arranged in independent partitions. Individual modules can be replaced without damaging hardware, integral disassembly, secondary wiring modification or program reconfiguration.
The customized point configuration of HCFCACABANB2BAN1XD matches operating conditions of mainstream medium-voltage feeder circuits. The hardware features outstanding universality and interchangeability, compatible with both new and legacy distribution architectures. It enables rapid in-situ replacement of old equipment, system expansion and function upgrade, significantly reducing downtime maintenance and technical transformation costs.
2.5 Comprehensive Self-Diagnosis and Traceability for Standardized & Compliant O&M
Built-in full-dimensional hardware and software self-diagnosis mechanisms monitor hidden risks 24/7 including sampling circuit abnormalities, I/O port faults, communication link interruptions, power fluctuations and program exceptions. Fault points are accurately located and active alarms are triggered.
The device permanently stores fault recording waveforms, SOE logs, protection operation messages, equipment operating parameters and operation logs. The complete fault process can be reconstructed to provide full and accurate data support for power grid fault analysis, hidden danger investigation, system optimization and compliance traceability, meeting standardized operation requirements of the power industry.
2.6 Industrial-Grade Robust Protection for Harsh Complex Sites
The unit is designed and manufactured in accordance with the highest protection standards for the power industry. It has passed rigorous EMC anti-interference tests, temperature cycling aging, vibration shock and humidity durability tests. Free of vulnerable mechanical components, it features strong immunity to electromagnetic interference, voltage fluctuation, extreme temperature, dust, moisture, vibration and aging. With low power consumption and low temperature rise, it can run continuously 24/7 in complex industrial sites such as substations, outdoor switch stations and industrial power rooms with heavy dust and strong electromagnetic interference, adapting to continuous production scenarios in power, chemical, metallurgical and manufacturing industries.
2.7 Dual Human-Machine Interface for Efficient Commissioning and Inspection
Fitted with a high-resolution Chinese LCD Local Human-Machine Interface (LHMI), it supports local parameter setting, real-time operating data viewing, on-site fault query, circuit commissioning verification and status alarm display. Meanwhile, the built-in Web Human-Machine Interface (WHMI) allows remote web login for online protection parameter modification, real-time operating data reading, fault waveform export and verification of protection logic and interlock programs. No professional commissioning tools are required, streamlining equipment commissioning, routine inspection and troubleshooting procedures and substantially improving distribution maintenance efficiency.
3. Technical Specifications
3.1 Basic Specifications
Model: REF615C-D Full Order Code: HCFCACABANB2BAN1XD Brand: ABB Series: Relion® 615 Series Device Type: Medium-Voltage Feeder Intelligent Protection and Control IED Core Functions: Medium-voltage feeder protection, electrical parameter measurement, intelligent circuit breaker control, operating condition monitoring, fault recording traceability, multi-protocol communication upload, system operation management Applicable Scenarios: 10 kV / 35 kV distribution feeders, ring network sectioning / tie switches, auxiliary power circuits, municipal distribution systems, distribution circuits connected with distributed photovoltaic / wind power Hardware Features: Modular pluggable structure, highly integrated monolithic design, industrial anti-interference hardware Core Advantages: Accurate protection, fast response, multi-protocol networking, easy maintenance, compatible with new energy operating conditions, stable and reliable operation
3.2 Protection Function Specifications
Main Protection Functions: Three-stage overcurrent protection (instantaneous overcurrent, definite-time delayed instantaneous overcurrent, definite-time overcurrent), zero-sequence overcurrent protection, high-sensitivity earth fault protection, negative-sequence overcurrent protection Backup Protection: Overvoltage protection, undervoltage protection, overload protection, thermal overload protection, under-frequency load shedding, overfrequency protection, three-phase unbalance protection Auxiliary Protection: Circuit breaker failure protection, line auto-reclosing, fault blocking protection, soft-start blocking, circuit abnormality supervision Protection Accuracy: Setting error for current and voltage protection ≤ ±1.5%; operation time error ≤ ±20 ms Operating Characteristics: Supports both definite-time and inverse-time modes; customizable protection curves to match graded coordination of multi-level power grids Fault Tolerance: Adaptable to load fluctuation, harmonic interference and transient operating disturbances to prevent unwanted tripping, failure to trip and cascading tripping
3.3 Measurement Accuracy Specifications
Measured Quantities: Three-phase current, three-phase voltage, active power, reactive power, apparent power, power factor, system frequency, three-phase unbalance factor, accumulated energy, harmonic contents of each order, power flow direction monitoring Measurement Accuracy: Current & voltage ±1.5%; power & energy ±2.0%; frequency ±0.01 Hz Sampling Characteristics: High-speed synchronous sampling; real-time refresh of electrical parameters under steady and dynamic conditions to support precise measurement under bidirectional power flow Data Statistics: Daily/monthly/annual energy accumulation statistics, operating extreme value recording, operating trend analysis, load curve storage
3.4 Communication & Interface Specifications
Communication Protocols: IEC61850 Ed2, IEC60870-5-103, Modbus RTU/TCP, DNP3 Communication Interfaces: Gigabit Ethernet ports, RS485/RS232 serial ports, expandable fiber communication interfaces Networking Modes: Single network, dual redundant network, point-to-point communication, bus networking with high stability Data Transmission: Real-time upload of telemetry and telesignal data; remote reception of remote control and remote adjustment commands; fast push of fault messages, waveform files and event records Commissioning Interfaces: Dedicated local service port, remote web commissioning port supporting online configuration, parameter modification and logic verification
3.5 Electrical Power Supply Specifications
Operating Power Supply: Wide-range AC/DC universal supply Operating Voltage Range: 80%～120% of rated voltage, adaptable to regular grid fluctuations Power Supply Features: Built-in protection circuits against surge, ESD, overvoltage, overcurrent and short-duration power failure Power Consumption: Low overall power consumption design, low temperature rise without power drift or parameter deviation Supply Stability: Maintains continuous operation without restart or data loss under transient grid fluctuations and short power interruptions
3.6 I/O & Control Specifications
Digital Inputs: Multiple passive opto-isolated binary inputs for collection of circuit breaker switching position, spring charged status, local/remote status, equipment alarm signals and interlock status Digital Outputs: Multiple relay outputs for circuit breaker switching drive, fault alarm output, system interlock linkage and fault trip output Control Functions: Local manual control, remote control, customizable logic interlock, auto-reclosing, fault locking shutdown I/O Characteristics: Fully opto-isolated ports with anti-interference and anti-false triggering performance suitable for industrial sites with strong electromagnetic fields Interlock Logic: Supports user-defined multi-channel I/O blocking and interlock logic to satisfy special on-site process and distribution operating conditions
3.7 Environmental & Certification Specifications
Operating Temperature: -25℃ ~ +70℃ Storage Temperature: -40℃ ~ +85℃ Operating Humidity: 5%～95%RH (non-condensing, no strongly corrosive gas) Electromagnetic Compatibility: Fully complies with IEC61000 series industrial EMC standards, resistant to heavy electromagnetic interference, high-frequency harmonic disturbance and electrostatic discharge Protection Design: Industrial dust-proof, moisture-proof and anti-interference structure for indoor cabinet mounting Operation Mode: Unattended 24/7 stable operation all year round Compliance: Conforms to international IEC power standards and technical specifications for distribution equipment of State Grid and China Southern Power Grid, compatible with domestic power operation systems
4. Operating Principle
The ABB REF615C-D HCFCACABANB2BAN1XD feeder protection and control IED adopts a high-performance dedicated power main controller as its core. Based on high-precision synchronous sampling technology, adaptive filtering algorithms and standardized power protection logic, it realizes integrated intelligent operation including protection, measurement & control, communication and traceability for medium-voltage feeder circuits.
After power-on, the unit automatically completes full hardware self-test, sampling circuit verification, I/O initialization, communication protocol matching, parameter loading and logic verification to finish initialization and standby, ensuring fault-free startup, valid program and intact communication links.
During normal operation, the device synchronously collects basic electrical parameters such as three-phase current, three-phase voltage and system frequency via high-precision sampling circuits. Built-in algorithms calculate operating parameters including power, energy, unbalance factor, harmonics and power flow direction in real time. On one hand, operating status, electrical parameters and alarm information are displayed on the local LCD; on the other hand, telemetry and telesignal data are uploaded to background monitoring systems via redundant communication links to achieve remote visualized and digital monitoring of distribution circuits.
Meanwhile, binary signals such as circuit breaker position, spring charged status and local/remote selection are continuously monitored, and predefined interlock and blocking logic is executed strictly to guarantee compliant and stable operation of distribution systems.
When faults such as short-circuit, overload, earth leakage, abnormal voltage, three-phase unbalance and frequency abnormality occur on the feeder, the corresponding protection logic is triggered instantly. The unit accurately identifies fault type, magnitude and duration. Once setting thresholds are reached, trip commands are rapidly issued to open the circuit breaker and isolate the faulty circuit immediately. It effectively prevents safety hazards including large-scale power outages, equipment burnout and system oscillation caused by fault escalation.
Upon fault detection, fault recording, SOE logging and fault message storage are activated automatically to record pre-fault and post-fault waveforms, operation sequence, operating parameters and operation logs, providing precise data support for fault analysis and power grid optimization.
For daily maintenance, the device supports local manual operation, remote circuit breaker control, online parameter setting and logic commissioning. Equipped with built-in self-diagnosis mechanisms, it continuously detects hardware, circuit and communication abnormalities and generates active alarms to comprehensively guarantee safe, stable, intelligent and efficient operation of medium-voltage feeder distribution systems.
5. Application Scenarios
5.1 Integrated Protection and Control of Conventional Medium-Voltage Distribution Feeders
Widely applicable to overhead lines and cable feeder circuits of 10 kV and 35 kV municipal and industrial medium-voltage distribution networks. It provides complete protection against overcurrent, earth fault, overload, abnormal voltage and frequency, as well as high-precision electrical measurement, circuit monitoring and intelligent circuit breaker control. Used for intelligent management of regular feeders in urban distribution stations, industrial park power rooms and enterprise self-owned substations to ensure stable and continuous power supply of distribution networks.
5.2 Intelligent Management of Ring and Tie Distribution Circuits
Suitable for core circuits of ring main units, sectioning switches and tie switches in distribution networks. Leveraging flexible customizable protection logic and interlock control, it realizes intelligent ring power flow regulation, accurate fault zone isolation and rapid power restoration for non-fault sections. It effectively improves power supply reliability and self-healing capability of distribution networks, adapting to new intelligent distribution scenarios such as maintenance without power cut, grid reconfiguration and intelligent load transfer.
5.3 Distribution Systems Connected with Distributed New Energy Sources
For complex circuits connected with distributed power sources such as photovoltaic and wind power, the device adapts to special operating conditions including bidirectional power flow, harmonic disturbance and voltage fluctuation. It effectively solves problems triggered by grid connection of new energy such as protection maloperation, voltage deviation, excessive harmonics and disordered power flow. It delivers comprehensive grid-tied protection, operating monitoring and power quality analysis capabilities to meet intelligent operation requirements of new energy distribution networks.
5.4 Intelligent Upgrade of Legacy Distribution Systems
It can directly replace traditional discrete protection, measurement and communication devices in-situ. One unit integrates functions previously covered by multiple secondary equipment, greatly simplifying secondary wiring and lowering failure rates and maintenance costs. No cabinet or primary circuit modification is required to upgrade protection accuracy, communication intelligence level and digital maintenance capacity, comprehensively improving automation and intelligence of aging substations.
5.5 Protection of Auxiliary Power Systems in Industrial and Mining Enterprises
Suitable for medium-voltage auxiliary power circuits of metallurgy, chemical, light industry, manufacturing and other enterprises with heavy loads and continuous production. Targeting industrial characteristics of severe load fluctuation, complex operating conditions and high demand for uninterrupted power supply, it relies on accurate protection logic, strong anti-interference performance and ultra-high operational stability to avoid sudden power outages and equipment faults, guarantee uninterrupted operation of production lines and prevent production losses.
5.6 Power Standardized Operation and Fault Traceability
Supported by complete event logging, fault recording, operation log and operating data storage functions, the unit permanently retains full-dimensional operating data of distribution networks. It satisfies digital traceability requirements including compliance filing, fault review and analysis, hidden risk investigation and system optimization of the power industry, perfectly matching modern intelligent, standardized and regulated power operation management systems.
