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ABB REF615C‑E (Order No.: HCFFAEAGABC2BAA11E) is a digital feeder protection and control device, belonging to the core relay protection equipment of the ABB Relion® 615 series.It is manufactured in Switzerland.Different from the REF615E_E feeder protection relay, REU615E_D voltage protection relay, REG216 digital generator protection system, and various pure I/O and measurement modules, its core advantage is specialized in comprehensive fault protection, accurate measurement & control, and flexible control for feeders in medium‑ and low‑voltage distribution networks.Integrating IEC 61850 standard platform technology and advanced fault detection algorithms, it is designed for industrial power distribution, commercial building power supply, municipal distribution networks, power substations, and other applications.It provides full‑dimensional protection against short circuit, overload, earth fault, etc., and integrates measurement, control, communication, arc protection, and other functions.It is key equipment to ensure safe, stable, and efficient operation of distribution network feeders, known as the “Guardian of the Power Grid”.
I. Product Positioning
ABB REF615C‑E (Order No.: HCFFAEAGABC2BAA11E) is used for the protection, measurement, and control of overhead lines, feeder circuits, and cable lines in medium‑ and low‑voltage distribution networks (1 kV–52 kV, mainly for 10 kV/20 kV distribution networks).It is widely applied in power substations, auxiliary feeders in power plants, industrial captive substations (iron and steel, chemical, cement, etc.), commercial complexes, residential quarters, municipal public facilities (road lighting, sewage treatment plants), and other scenarios.It can serve as the core component of a distribution network feeder terminal unit (FTU), realizing feeder fault detection, isolation, and restoration control, and supporting the operation of distribution automation systems.
The device undertakes the core responsibilities of real‑time electrical parameter monitoring, accurate identification of various faults, rapid protection operation, and flexible control for feeder circuits.It can accurately detect directional or non‑directional overcurrent, earth fault, overvoltage, undervoltage, zero‑sequence voltage fault, thermal overload, intermittent earth fault, and other fault types.It clears faults through fast tripping, alarm, and other actions to limit fault expansion and protect the safety of feeders and downstream electrical equipment.Unlike voltage protection relays (e.g., REU615E_D), generator protection systems (e.g., REG216), and pure measurement modules, it focuses on the core needs of feeder protection, integrating protection, control, measurement, communication, condition monitoring, and arc protection in one unit.No additional auxiliary modules are required, which greatly improves the intelligence level and operation & maintenance efficiency of feeder protection in distribution networks.
The device adopts a modular hardware architecture and high‑performance core chip, developed based on the IEC 61850 platform.It supports interoperability and horizontal communication among intelligent devices in the substation and provides 7 standard configuration applications, which can flexibly adapt to different user requirements.It can serve as primary protection for overhead lines and feeders in distribution networks, as well as backup protection for transformers and other equipment.It adapts to various distribution network topologies such as radial and loop networks, and meets the protection requirements of different scenarios such as high impact of industrial loads and scattered civil loads.Mean time between failures (MTBF) is more than 100,000 hours.Operation authority is divided into four levels: Viewer, Operator, Engineer, and Administrator, ensuring safe and compliant operation.
II. Technical Parameters
| Item | Specification |
|---|---|
| Type | REF615C‑E |
| Order No. / Material Code | HCFFAEAGABC2BAA11E |
| Equipment Type | Industrial‑grade digital feeder protection and control device, ABB Relion® 615 series, Intelligent Electronic Device (IED), manufactured in Switzerland |
| Applicable Voltage Level | 1 kV–52 kV (medium‑ and low‑voltage distribution networks), mainly for 10 kV/20 kV distribution networks; PT secondary rated voltage: 100 V (line voltage) / 57.7 V (phase voltage) |
| Rated Current | CT secondary rated current: 1 A or 5 A; measuring range: 0.1In~20In; earth CT rated current: 5/1 A; SEF/HIZ CT rated current: 0.2 A |
| Measuring Accuracy | Class 0.2 for current, voltage, and energy measurement, meeting high‑precision measurement and control requirements |
| Protection Operating Time | Instantaneous overcurrent protection ≤20 ms; earth fault protection ≤30 ms; time‑delayed overcurrent protection adjustable (100 ms~10 s); fast response for arc protection |
| Electrical Isolation | Full galvanic isolation between input, output, and communication circuits, effectively blocking electromagnetic interference and ensuring stable operation |
| Power Supply | Wide‑range AC/DC power supply: 24 V DC / 48 V DC / 110 V DC / 220 V DC ±20%; 110 V AC / 220 V AC ±20%; power consumption ≤15 W |
| Operating Temperature | -40 ℃ ～ +70 ℃, humidity: 5%~95% (non‑condensing), suitable for harsh environments such as outdoor terminal boxes and indoor control cabinets |
| Storage Temperature | -40 ℃ ～ +85 ℃ |
| Protection Class | Front panel IP54, unit IP20 (for cabinet mounting, dustproof and touch‑proof) |
| Dimensions | Approx. 360 mm × 250 mm × 180 mm, compact design, supports 35 mm standard DIN rail mounting or flush panel mounting; front panel with plug‑and‑pull structure |
| Weight | Approx. 10 kg, modular structure; CT secondary circuit automatically short‑circuited when plug‑in units are removed, easy for installation, testing, and maintenance |
| Terminal Type | Industrial‑grade screw terminals, suitable for power cables and control signal wires, reliable contact, anti‑loosening, convenient wiring |
| Communication Interface | Standard RS485 (supports Modbus RTU), native support for IEC 61850 (including GOOSE, MMS), equipped with 2 Ethernet ports; supports remote monitoring, setting adjustment, and fault data upload |
| Fault Recording | Sampling rate 1 kHz; recording duration: 200 ms before fault + 800 ms after fault; storage capacity ≥100 records; COMTRADE format; enhanced fault recording function |
| Key Features | Multi‑type feeder fault protection, high‑precision measurement & control, arc protection (3 channels optional), programmable logic, multi‑shot reclosing, condition monitoring, remote management, high anti‑interference, modular configuration, supports Chinese interface, RoHS compliant, complies with IEC 61850, IEC 60255 |
III. Core Functions
1. Full‑Dimensional Feeder Fault Protection
Integrates a complete set of feeder protection functions, covering fault protection for all feeder operation scenarios.It provides directional or non‑directional overcurrent protection (three stages: instantaneous, time‑delayed instantaneous, time‑delayed) and inverse‑time overcurrent protection.Protection settings can be flexibly configured according to feeder load characteristics; instantaneous overcurrent protection clears severe short‑circuit faults rapidly within ≤20 ms.It supports sensitive earth protection, instantaneous earth protection, and intermittent earth protection, accurately identifying single‑phase earth faults and solving the problem of earth fault location in distribution networks.It integrates auxiliary protection such as overvoltage, undervoltage, zero‑sequence voltage protection, and thermal overload protection.Interlocking control with circuit breakers and disconnectors can be realized through logic programming, preventing various fault risks in all aspects.Three arc protection channels are optional, realizing arc detection and fast protection for circuit breakers, cables, and busbar chambers in switchgear, further improving equipment safety.
2. High‑Precision Measurement & Control and Data Recording
Has Class 0.2 high‑precision energy measurement capability, collecting and calculating various electrical parameters of feeders in real time, including three‑phase current, voltage, active power, reactive power, power factor, frequency, forward/reverse energy, etc.Data are updated in real time and can be displayed via the local panel or remote platform.Built‑in enhanced fault recording function captures electrical waveforms before and after faults, providing accurate data support for fault analysis and troubleshooting.Supports storage of multiple setting groups (up to 8 groups), which can be quickly switched via communication or local operation, adapting to protection requirements of different feeder operation modes (maintenance, normal power supply).It also provides comprehensive condition monitoring, monitoring the status of the device’s software and hardware, communication, VT fuse failure, current circuits, etc., ensuring normal operation.
3. Flexible Control and Interlocking Functions
Provides complete control functions, supporting local and remote control.Operation & maintenance personnel can perform opening/closing operations on circuit breakers via control buttons on the device panel or the background monitoring system (SCADA).Integrates multi‑shot reclosing function, supporting reclosing pre‑acceleration and post‑acceleration logic, which can be flexibly configured according to distribution network topology, improving power supply reliability and reducing power outage time for users.Provides graphical logic programming tools (programmable via Signal Matrix Tool SMT in PCM600), allowing users to customize protection logic and interlocking conditions according to actual needs, realizing personalized functions such as load interlock control, adapting to the requirements of different distribution network operation scenarios.Common feeder protection logic is pre‑configured in the device, enabling quick installation, testing, and acceptance, greatly improving commissioning efficiency.
4. Intelligent Communication and Remote Management
Developed based on the IEC 61850 standard platform, natively supporting mainstream power communication protocols such as IEC 61850 (including GOOSE, MMS) and Modbus RTU.Equipped with dual communication interfaces (Ethernet and RS485), it can be seamlessly connected to smart substation automation systems (SAS) and distribution automation platforms, realizing remote upload of protection information, measurement data, and remote setting adjustment.Supports high‑speed GOOSE message transmission, realizing millisecond‑level interaction of key signals such as tripping and interlocking among IEDs, replacing traditional hard wiring, simplifying engineering design and cabling, and improving system flexibility and scalability.Supports remote access and local control, and can display customized system layout diagrams, facilitating O&M personnel to remotely monitor equipment status, troubleshoot faults, and reduce O&M costs.
5. Flexible Configuration and Convenient Operation
Adopts modular hardware and software design.The order code accurately defines configurations such as protection function combinations, I/O specifications, communication interface types, and power supply types.It also provides 7 standard configuration applications, allowing users to select functions in a “menu‑style” manner according to project requirements, achieving customized solutions and avoiding function redundancy.The front panel is available with two LCD sizes, displaying up to 10 lines of characters, supporting a Chinese interface.The improved panel operation buttons are rich and intuitive, facilitating local operation.Supports the special ABB PCM600 commissioning software, enabling engineers to easily complete parameter setting, logic programming, simulation testing, and online monitoring, significantly improving commissioning efficiency.
6. High Reliability and Environmental Adaptability
Uses high‑stability industrial‑grade components manufactured in Switzerland and passes the IEC 61000 series EMC tests.It can effectively resist surges, electromagnetic radiation, and high‑frequency interference in distribution networks, ensuring long‑term stable operation in strong interference environments.Wide operating temperature range (-40 ℃ ～ +70 ℃) and protection class up to IP54, suitable for various installation environments such as outdoor terminal boxes and indoor control cabinets.Built‑in self‑test circuit monitors the device status in real time; onboard LED indicators or LCD screen display normal/alarm/fault status, facilitating fast fault location and reducing O&M costs.Supports redundant configuration to further improve system reliability and avoid protection interruption caused by single equipment failure.Plug‑and‑pull panel design improves installation and testing efficiency; the CT secondary circuit is automatically short‑circuited when plug‑in units are removed, ensuring operational safety.
IV. Applications
1. Power Industry Distribution Networks
Feeder protection for outgoing lines in 10 kV/20 kV/35 kV public substations and power plants.As the primary feeder protection device, it quickly clears short circuit, overload, and earth faults.Combined with the reclosing function, it improves the power supply reliability of distribution networks and reduces user power outage time.It can also serve as the core component of a distribution network feeder terminal unit (FTU), realizing feeder fault detection, isolation, and restoration control, supporting the operation of distribution automation systems and ensuring stable operation of the power system.
2. Industrial Enterprise Distribution Networks
Captive substations of large industrial enterprises such as iron and steel, chemical, cement, mining, and machinery manufacturing, used for the protection and measurement & control of workshop power feeders and motor feeders.In view of the high impact of industrial loads, it ensures the safety of production equipment and power supply continuity by flexibly configuring protection settings and logic.Adapts to harsh operating environments in industrial fields such as converter steelmaking, mining, and cement manufacturing, resisting strong electromagnetic interference and temperature fluctuations.It can cooperate with PLC logic to realize load interlock control, ensuring production continuity.
3. Commercial and Civil Building Distribution Networks
Feeder protection for 10 kV incoming lines and 0.4 kV outgoing lines in commercial complexes, office buildings, and residential quarters.Through overvoltage, undervoltage, overload, and other protections, it prevents damage to sensitive electrical equipment such as air conditioners, elevators, servers, and lighting caused by abnormal voltage and overload, ensuring the safety of commercial operations and residential electricity use.Adapts to compact switchgear installation, saving cabinet space and improving the intelligence level of the power distribution system.It also supports remote monitoring, reducing property O&M costs.
4. Municipal and Public Facilities Distribution Networks
Applied in municipal public facilities such as urban road lighting, sewage treatment plants, supporting power distribution systems for rail transit, airports, and ports.Through the automatic switchover logic and remote control function, it realizes rapid processing and recovery of feeder faults, improving the power supply reliability of public facilities and reducing social impact caused by power outages.Adapts to harsh outdoor environments, ensuring long‑term stable operation of equipment and normal provision of public services.
V. Product Advantages
Feeder‑dedicated, comprehensive protection: Designed specifically for medium‑ and low‑voltage feeder circuits, integrating full‑type protection functions such as short circuit, overload, earth fault, and arc protection. Fast operation, high sensitivity, quickly clearing faults and limiting fault expansion. With 7 standard configurations, it can serve as both primary and backup protection, focusing on the core needs of feeder protection, different from generator protection, voltage protection, and pure measurement modules.
Swiss‑made, accurate and reliable: Original Swiss manufacturing, using high‑stability industrial‑grade components, Class 0.2 measurement accuracy, accurately collecting various electrical parameters. Built‑in enhanced fault recording function provides complete data support for fault analysis. Stores multiple setting groups, adapting to different operation scenarios, meeting the lean management requirements of distribution networks, with MTBF > 100,000 hours.
Intelligent communication, interconnection: Developed based on the IEC 61850 platform, natively supporting mainstream protocols such as IEC 61850 and GOOSE, realizing millisecond‑level signal interaction and remote management. Seamlessly connectable to smart distribution network automation platforms, simplifying cabling and engineering design, supporting remote commissioning and fault diagnosis, improving system intelligence and O&M efficiency.
Flexible configuration, strong customization: Modular hardware and software design; order code accurately configures functions, interfaces, power supply, and other parameters. Supports graphical logic programming, pre‑configures common protection logic, adapts to different distribution network topologies and personalized requirements, achieving optimal cost‑effectiveness. Also supports Chinese interface for convenient operation.
High reliability, safe adaptation: Strong anti‑interference design, passing IEC 61000 series EMC tests. Wide operating temperature range and high protection class, suitable for various harsh indoor and outdoor environments. Plug‑and‑pull panel design; CT secondary circuit automatically short‑circuited when plug‑ins are removed. Four‑level operation authority management balances safety and O&M convenience.
Efficient O&M, convenient commissioning: Graphical LCD screen and user‑friendly interface, supporting local and remote commissioning and maintenance. Modular plug‑and‑play design for quick installation and replacement. Pre‑configured protection logic enables fast testing and acceptance, greatly shortening downtime for maintenance and reducing O&M costs.
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