ABB REF615C-E HCFFAEAGAABC2BAA11E feeder protection and control

ABB REF615C-E HCFFAEAGAABC2BAA11E feeder protection and control

Overview of Device Core

ABB REF615C-E HCFFAEABAB2BA11E is a high-precision, high reliability feeder protection and control device designed specifically for medium and low voltage distribution systems. As ABB Relion ®  The core member of the 615 series, this device is positioned with "precise protection, intelligent control, and convenient operation and maintenance" as its core. It can quickly detect and reliably cut off faults such as short circuits, overloads, and grounding in feeder circuits. At the same time, it has complete control functions and data acquisition capabilities, providing comprehensive guarantees for the safe and stable operation of distribution networks. It has a wide range of adaptation scenarios, covering various medium and low voltage distribution environments such as industrial enterprise power distribution systems, commercial building power supply networks, municipal power distribution networks, etc., especially suitable for occasions with high requirements for power supply continuity and reliability.

Core functions and technical features

2.1 Comprehensive protection function

This device integrates multiple protection logics for feeder circuits, which can achieve precise response according to different fault types and minimize the impact range of faults to the greatest extent possible

-Short circuit protection: Equipped with three-stage overcurrent protection (quick break, time limited quick break, overcurrent) function, the protection setting can be flexibly set according to system parameters, and graded tripping can be achieved for different short-circuit current levels. It can quickly cut off serious short-circuit faults and avoid misoperation in non fault areas. Simultaneously supporting short-circuit current limiting function, cooperating with circuit breakers to achieve collaborative protection and reduce the impact of fault current on equipment.

-Overload protection: Adopting inverse time or definite time protection characteristics, it can accurately monitor the load current of the feeder circuit. When the current continues to exceed the rated value, it will issue an alarm or trip command according to the preset logic, effectively protecting cables, transformers and other equipment from overload damage and extending the service life of the equipment.

-Grounding fault protection: Corresponding grounding protection algorithms (such as zero sequence current protection and residual current protection) are configured for different grounding methods such as neutral point direct grounding and arc suppression coil grounding, which can quickly detect single-phase grounding and other grounding faults. Especially in low current grounding systems, the fault line can be accurately located through the line selection function, shortening the fault handling time.

-Special protection function: equipped with overvoltage and undervoltage protection, which can prevent abnormal voltage from causing damage to electrical equipment; Support reclosing function (including voltage and synchronization logic detection), suitable for scenarios such as overhead lines that are prone to instantaneous faults, and improve power supply reliability; Some models can also expand system stability control functions such as low-frequency load shedding and high-frequency cutting.

2.2 Flexible and efficient control functions

The device uses a microprocessor as its core to achieve intelligent control of the feeder circuit, meeting the operational requirements of different operating scenarios:

-Local and remote control: Supports local circuit breaker opening and closing control through device panel buttons and external operation handles. At the same time, remote control commands can be received through communication networks to achieve remote operation, adapting to the operation and maintenance needs of unmanned substations or intelligent distribution systems.

-Logic control function: Built in programmable logic controller (PLC) function, users can customize control logic through graphical programming tools to achieve complex functions such as interlocking control, automatic switching (ATS) logic, load transfer control, etc., without the need for additional dedicated PLC configuration, reducing system integration costs.

-Operation locking and error prevention: It has a complete operation locking function, which can achieve opening and closing locking based on signals such as switch position and voltage status to prevent misoperation; Support linkage with five prevention systems to meet the requirements of power system misoperation prevention standards.

2.3 Accurate data collection and monitoring

The device has high-precision analog and switch acquisition capabilities, providing reliable data support for the operation monitoring and data analysis of the distribution network

-Analog quantity acquisition: It can collect electrical parameters such as three-phase current, three-phase voltage, power factor, active power, reactive power, and electric degree. The measurement accuracy of current and voltage can reach 0.2 level, and the measurement accuracy of power can reach 0.5 level, meeting the high-precision requirements of energy metering and operation monitoring.

-Switching acquisition: It can access switch signals such as circuit breaker position, isolation switch position, energy storage status, alarm signals, etc. It supports anti shake processing and status change recording to ensure the accuracy and reliability of signal acquisition.

-Operation status monitoring: Real time monitoring of the device's own operation status (such as power status, CPU operation status, communication status) and external device status. When abnormalities occur, timely device fault alarm signals are issued to facilitate quick problem location by operation and maintenance personnel.

2.4 Reliable communication and networking capabilities

To achieve information exchange with the higher-level monitoring system, the device is equipped with rich communication interfaces and complete communication protocols, supporting multiple networking methods:

-Communication interface: RS485, Ethernet (RJ45) and other communication interfaces are standard configuration, and some models support optical fiber communication interfaces to meet networking scenarios with different transmission distances and anti-interference requirements.

-Communication Protocol: Supports mainstream power communication protocols such as IEC 61850, IEC 60870-5-103, Modbus RTU/TCP, and can seamlessly integrate with SCADA systems, distribution automation systems (DAS), or smart grid dispatch platforms to achieve telemetry, remote signaling, remote control, and remote adjustment (four remote) functions. The IEC 61850 protocol supports GOOSE (General Object Oriented Substation Events) and SV (Sampling Value) services, enabling fast information exchange and digital sampling between devices, and adapting to the construction needs of intelligent substations.

2.5 High reliability and usability design

The device adopts industrial grade hardware design and a comprehensive software fault tolerance mechanism to ensure stable and reliable operation in complex operating environments, while also emphasizing the convenience of operation and maintenance:

-Hardware reliability: Adopting a modular structure design, the power module, CPU module, I/O module, communication module, etc. can be independently plugged and unplugged for easy maintenance and replacement; The device has good electromagnetic compatibility (EMC) performance, complies with the IEC 61000 series standards, and can resist electromagnetic interference in industrial sites; The power module supports wide voltage input and adapts to different power supply environments.

-Software and data security: It has a complete fault recording function, which can record the electrical waveform and switch status before and after the fault, providing a basis for fault analysis; Support event recording function, can store operation events, alarm events and other information, with a large recording capacity and no loss during power failure; Equipped with password permission management function to prevent unauthorized personnel from modifying protection settings and control logic, ensuring system security.

-Usability design: equipped with a large-sized LCD display and user-friendly operation buttons, supporting a Chinese interface, making it easy for on-site personnel to view operating parameters and operations; Support firmware upgrade and parameter backup/recovery through USB interface or communication network, simplifying the operation and maintenance process; Some models support infrared remote control operation, which is convenient for use when it is inconvenient to operate directly inside the switchgear.

Overview of Technical Parameters

rated voltage

Control circuit: DC 24V/48V/110V/220V; AC sampling: 100V (line voltage), 5A/1A (rated current)

Protect response time

Quick break protection response time ≤ 20ms

measurement accuracy

Current and voltage: 0.2 level; Power and Electricity: Level 0.5

communication interface

1-2 RS485 interfaces, 1-2 Ethernet interfaces (supporting IEC 61850)

working environment

Temperature: -25 ℃~+70 ℃; Humidity: 5%~95% (no condensation); Altitude: ≤ 2000m (beyond which capacity reduction is required)

Protection level

Panel: IP54; Overall device (after installation): IP20

Overall dimensions

Standard 19 inch rack installation, typically 4U or 6U in height (refer to product manual for details)

Typical application scenarios

1. Industrial enterprise power distribution system: used for factory workshop feeder circuit protection, realizing power supply protection and control of important loads such as motors and production lines, and cooperating with PLC logic to achieve load interlocking control, ensuring production continuity.

2. Commercial and civil buildings: Suitable for the protection of power distribution lines in office buildings, shopping malls, and residential areas. Through precise overload and grounding protection, the safe operation of lighting, air conditioning, elevators, and other equipment in the building is ensured. At the same time, remote monitoring is supported to reduce property operation and maintenance costs.

3. Municipal and public facilities: used for urban road lighting, sewage treatment plants, rail transit supporting power distribution systems, etc. By using backup automatic switching logic and remote control functions, the reliability of power supply for public facilities is improved, and the social impact caused by power outages is reduced.

4. Medium voltage distribution network: As the core component of the distribution network feeder terminal unit (FTU), it realizes fault detection, isolation, and recovery control of 10kV/20kV distribution network feeders, supporting the construction of distribution automation systems.

Installation and operation precautions

-The installation of the device must strictly follow the requirements of the product manual to ensure firm installation, reliable grounding, and avoid close placement with strong interfering equipment to ensure electromagnetic compatibility performance.

-Before the first operation, comprehensive parameter configuration and functional testing are required, including protection setting, logic control circuit verification, communication link testing, etc., to ensure that the device functions meet the on-site requirements.

-In daily operation and maintenance, the operating status of the device should be regularly checked, including panel indicator lights, LCD displays, communication status, etc. Regular cleaning and dust removal of the device should be carried out to avoid dust accumulation affecting heat dissipation and insulation performance.

-Regularly backup device parameters and event records for easy fault analysis and system recovery; If firmware upgrade is required, it is necessary to strictly follow the upgrade process provided by ABB to avoid device failure caused by upgrade failure.