ABB REC650 1MRK008514-CB multifunctional circuit breaker

ABB REC650 1MRK008514-CB multifunctional circuit breaker

Core positioning and design philosophy

REC650 1MRK008514-CB is not a traditional mechanical circuit breaker body, but an intelligent electronic device that integrates protection, control, measurement, and communication. By linking with the mechanical body of the circuit breaker, it achieves full lifecycle management of the distribution circuit. Its design strictly follows the IEC 61850 international standard, adopting a modular hardware architecture and layered software design, which not only meets the reliability requirements of conventional protection, but also adapts to the data exchange and remote operation and maintenance needs of smart grids.

The core design concept of this device revolves around "safety, reliability, precision, efficiency, and flexible adaptation". Through the built-in high-performance processor and high-precision data acquisition module, it achieves millisecond level fault recognition and protection actions. It also supports multiple communication protocols and expansion modules, and can flexibly configure functions according to different application scenarios.

Core functional system

2.1 Comprehensive protection function

REC650 1MRK008514-CB provides a complete protection solution for common fault types in medium voltage distribution networks, covering scenarios such as phase to phase, grounding, and overload. The protection logic can be flexibly configured through software to adapt to different power grid topologies.

-Phase to phase fault protection: including three-stage overcurrent protection (quick break, time limited quick break, overcurrent), short-circuit short delay protection, inverse time limited overcurrent protection, etc., it can accurately operate according to the size and duration of the fault current to avoid fault expansion. The action time of the quick break protection can reach up to 10ms, which is suitable for rapid fault removal of critical load circuits;

-Grounding fault protection: supports grounding fault protection for low current grounding systems (neutral point not grounded, grounded through arc suppression coils) and high current grounding systems. Through zero sequence current and zero sequence voltage detection, accurate positioning and removal of grounding faults are achieved, reducing the impact of grounding faults on the power grid;

-Special protection function: equipped with overvoltage protection, low voltage protection, frequency abnormality protection, and reclosing function (including synchronous detection and no voltage logic detection), while supporting motor circuit blockage protection and long starting time protection, suitable for the special operating requirements of motor loads;

-Backup protection and interlocking: It has backup protection functions such as circuit breaker failure protection and dead zone protection, and supports electrical interlocking with isolation switches and grounding switches to prevent safety accidents caused by misoperation.

2.2 Accurate measurement and monitoring

The device is equipped with a high-precision AD acquisition module, which can achieve real-time measurement of electrical parameters such as circuit current, voltage, power, electrical energy, and power factor. The measurement accuracy meets the requirement of 0.2 level and supports the separation measurement of fundamental and harmonic components, providing data support for power grid power quality analysis.

The monitoring function covers the operating status of the circuit breaker (opening and closing position, energy storage status), the device's own status (power supply, module operation, communication status), fault information recording (fault type, fault current, action time), etc. All data can be viewed in real time through the local display interface or remote monitoring system. Simultaneously supporting event recording function, it can store the last 1000 operation events and fault events, with a recording resolution of 1ms, facilitating fault tracing and analysis.

2.3 Flexible control and operation

REC650 1MRK008514-CB supports multiple control modes to meet the dual needs of local and remote operation and maintenance:

-Local control: Through the operation buttons (opening, closing, energy storage) on the device panel and LCD display interface, direct operation and parameter configuration of the circuit breaker can be achieved, and the operation process has permission verification and error prevention logic;

-Remote control: Receive control instructions from higher-level monitoring systems (such as SCADA, DCS) through communication networks to achieve remote opening and closing, parameter setting, protection switching, and other operations of circuit breakers. The control instructions are transmitted encrypted to ensure operational safety;

-Automatic control: supports linkage with the power grid automation system to achieve automatic operations based on logical criteria, such as backup automatic switching logic, automatic fault isolation and recovery, etc., to improve the reliability of power supply in the power grid.

2.4 Efficient Communication Capability

As a key node device of the smart grid, this device has powerful communication functions, strictly follows the IEC 61850 standard, supports GOOSE (General Object Oriented Substation Events) and SV (Sampling Value) services, and achieves fast data exchange and information sharing with other smart devices.

The communication interface configuration is flexible, with Ethernet interface (RJ45) and RS-485 interface as standard, supporting multiple communication protocols such as TCP/IP, Modbus RTU/TCP, IEC 60870-5-103, etc. It can seamlessly connect to monitoring systems from different manufacturers. At the same time, it supports self diagnosis of communication status. When the communication link is abnormal, it will promptly issue an alarm signal to ensure the stability of data transmission.

Detailed explanation of technical parameters

3.1 Basic Parameters

parameter category

specific indicators

Applicable voltage level

6-35kV

Rated working power supply

DC 24V/48V/110V/220V； AC 110V/220V (optional)

power consumption

≤ 15W during normal operation, ≤ 20W during protection action

Working environment temperature

-25 ℃~+70 ℃ (wide temperature version optional)

Storage environment temperature

-40℃~+85℃

relative humidity

5%~95%, no condensation

Protection level

IP42 (panel), IP20 (internal device)

3.2 Protection and Measurement Parameters

parameter category

specific indicators

Current measurement range

0.1In~20In (In is the rated current, configurable)

Voltage measurement range

0.1Un~1.2Un (Un is the rated voltage)

measurement accuracy

Current and voltage: 0.2 level; Power and electrical energy: Level 0.5

Protection action time

Quick break protection ≤ 10ms, other protections ≤ 50ms

Reclosing time 

0.1s~30s， Flexible tuning

Fault recording capacity

Supports 16 channels of analog waveform recording, with configurable recording length

3.3 Communication Parameters

parameter category

specific indicators

Ethernet interface

2 10/100Mbps adaptive Ethernet ports, supporting IEC 61850 GOOSE/SV

serial interface

2 RS-485 interfaces, supporting Modbus RTU, IEC 60870-5-103

communication range

Ethernet ≤ 100m (twisted pair); RS-485 ≤ 1200m (shielded twisted pair)

Structural design and installation

4.1 Hardware Architecture

REC650 1MRK008514-CB adopts modular hardware design, mainly composed of core control module, analog input module, switch input/output module, communication module, and power module. Each module adopts a plug-in design, which is convenient for on-site maintenance and functional expansion. The device is compact in size, with a standard installation method of 19 inch rack installation, occupying small space and adapting to the standardized layout of substation control rooms.

4.2 Human Computer Interaction Interface

The device is equipped with a 2.8-inch color LCD display screen with a resolution of 320 × 240, supporting multiple language displays such as Chinese and English. There are 6 function buttons and 1 emergency operation button on the operation panel, which can realize parameter setting, status inquiry, fault reset and other operations. Simultaneously supporting data export and software upgrade through USB interface to enhance operational convenience.

4.3 Installation Requirements

-The installation location should be far away from strong magnetic fields and sources of interference, avoiding direct sunlight and rainwater immersion;

-During installation, it is necessary to ensure good ventilation of the device and reserve at least 5cm of heat dissipation space around it;

-Wiring must strictly follow the wiring diagram. Analog circuits, switch circuits, and communication circuits should be wired separately to avoid cross interference;

-After installation, insulation testing is required to ensure that the insulation performance of the circuit meets the requirements.

Application scenarios

REC650 1MRK008514-CB, with its comprehensive functionality and flexible configuration, is widely used in the following scenarios:

1. Industrial enterprise power distribution system: such as workshop power distribution circuits and motor control circuits in chemical, metallurgical, manufacturing and other enterprises, to achieve precise protection and reliable control of important loads, and reduce the risk of production interruption;

2. Urban power grid substation: used for 10kV and 35kV level distribution substations, as protection and control devices for outgoing circuit breakers and segmented circuit breakers, supporting linkage with substation automation systems to achieve unmanned operation and maintenance;

3. New energy access system: such as the grid connected circuit of distributed photovoltaic and wind power projects, with special protection functions such as frequency anomalies and voltage fluctuations, to ensure the safe and stable interconnection between the new energy generation system and the power grid;

4. Public facility power distribution system: For places such as hospitals, data centers, and rail transit that require extremely high reliability of power supply, precise protection and rapid fault removal are used to ensure the continuous power supply of critical loads.

Precautions for use

-Before the device is put into operation, parameter tuning (such as rated current, protection settings, communication parameters, etc.) must be completed to ensure that the parameters match the actual operating conditions;

-Regularly inspect the device to check the power status, communication links, loose wiring terminals, and whether the display screen is displaying normally;

-Software upgrades need to be operated by professionals, and current configuration parameters must be backed up before upgrading to avoid parameter loss due to upgrade failure;

-When an alarm signal occurs in the device, the alarm information should be checked in a timely manner, the cause of the fault should be analyzed and dealt with to avoid the fault from expanding;

-The maintenance of the device must be carried out by ABB authorized service personnel, and non professionals are prohibited from disassembling or repairing it without authorization to avoid affecting equipment performance or causing safety accidents.