ABB REC670 1MRK002814-AC High-Performance Relay Module

ABB REC670 1MRK002814-AC High-Performance Relay Module 

Core positioning and advantages of the product

REC670 1MRK002814-AC is positioned with "high performance, high integration, and high adaptability" as its core, and demonstrates three significant advantages in response to the stringent requirements of the power system for relay protection:

1. Ultimate reliability: Adopting ABB's mature hardware architecture and anti-interference design, it can operate stably in complex working conditions such as wide temperature environment from -40 ℃ to+85 ℃, strong electromagnetic interference, voltage fluctuations, etc. The mean time between failures (MTBF) far exceeds the industry average, providing 24/7 uninterrupted protection for power equipment.

2. Flexible scalability: The module supports multiple communication protocols (such as IEC 61850, IEC 60870-5-103, etc.) and can seamlessly integrate into intelligent substation automation systems; Equipped with rich I/O interfaces and configurable logic, it can flexibly adjust functional configurations according to different application scenarios (such as line protection, transformer differential protection, etc.), reducing system upgrade and renovation costs.

3. Precise and efficient protection: Equipped with a high-performance 32-bit microprocessor and high-precision data acquisition unit, with a sampling frequency of up to 1kHz, it can quickly capture fault signals in the power system. The protection action time can be as short as 10ms, effectively shortening the duration of faults and reducing equipment damage and power outage losses.

Core functions and application scenarios

2.1 Core protection functions

REC670 1MRK002814-AC integrates comprehensive relay protection functions, covering various fault and abnormal scenarios of power equipment operation, mainly including:

-Overcurrent protection: including timed overcurrent protection and inverse time overcurrent protection, which can automatically adjust the action time according to the magnitude of the fault current and adapt to different levels of short-circuit current in the power grid environment.

-Differential protection: For equipment such as transformers and generators, accurate fault identification is achieved by comparing the difference in current on both sides, avoiding misoperation of faults outside the area and refusal of faults within the area.

-Voltage protection: covering overvoltage, low voltage, and voltage imbalance protection, effectively responding to the impact of grid voltage fluctuations on equipment and ensuring power quality.

-Grounding protection: supports the detection and location of grounding faults in low current grounding systems. Through the analysis of zero sequence current and zero sequence voltage, the grounding fault point can be quickly located to reduce the range of power outages.

-Backup protection: With a comprehensive backup protection logic, when the main protection refuses to operate, the backup protection function can be activated in a timely manner, forming a multi-level protection system and improving system reliability.

2.2 Main application scenarios

Based on its comprehensive functionality and flexible configuration, this module is widely used in the following fields:

1. Medium voltage transmission and distribution lines: As the main protection equipment of the line, it can quickly cut off faults such as short circuits and grounding, ensuring smooth transmission channels.

2. Power Transformer: Provides differential protection, overcurrent protection, etc. for distribution transformers and industrial transformers to prevent transformer damage due to faults and extend equipment service life.

3. Industrial power distribution system: In industrial scenarios such as steel, chemical, and manufacturing industries, it provides precise protection for the power supply circuit of important production equipment to avoid production interruptions caused by power outages.

4. Smart Substation: Based on the IEC 61850 communication protocol, it achieves seamless integration with the substation automation system, supports telemetry, remote signaling, and remote control functions, and assists in the intelligent upgrade of the power grid.

Key technical parameters

The performance advantage of REC670 1MRK002814-AC comes from its excellent technical parameters, and the core parameters are shown in the following table:

parameter category

specific parameters

Instructions

rated voltage

AC 110V/220V

Adapt control power supply voltage to different power grids

rated current

5A/1A

Support common current transformer ratio adaptation

sampling precision

±0.2%

The current and voltage sampling accuracy reaches 0.2 level, ensuring data accuracy

Protection action time

≤ 10ms (phase to phase short circuit)

Quickly respond to faults and reduce their impact

communication interface

Ethernet（RJ45）、RS485

Supports protocols such as IEC 61850 and IEC 60870-5-103

ambient temperature

-40℃~+85℃

Adapt to extreme weather conditions

Protection level

IP20 (panel)

Suitable for cabinet installation to prevent dust intrusion

Installation and operation characteristics

4.1 Convenient Installation Design

This module adopts a standardized 19 inch rack installation method, with a compact size and low installation space requirements; The terminal block adopts a plug-in design with clear identification, which facilitates on-site wiring and debugging, reducing the workload of installation personnel. At the same time, the module supports two types of wiring: front wiring and rear wiring, which can be flexibly selected according to the structure of the switchgear.

4.2 Intelligent operation and maintenance functions

To improve operation and maintenance efficiency, REC670 1MRK002814-AC integrates rich intelligent operation and maintenance functions:

-Fault recording: It can automatically record the waveform data of current and voltage before and after the occurrence of a fault, providing accurate basis for fault analysis and shortening the time for fault troubleshooting.

-Status monitoring: Real time monitoring of the working status of the module itself (such as power supply voltage, CPU load, etc.) and the operating parameters of the protected equipment, and timely issuing alarm signals when abnormalities occur.

-Remote operation and maintenance: realize remote parameter configuration, firmware upgrade, fault diagnosis and other functions through communication networks, reduce on-site operation and maintenance frequency, and lower operation and maintenance costs.

-Event recording: Detailed recording of event information such as protection actions, alarms, and operations, with a large recording capacity, supporting data export and analysis, and meeting the traceability requirements of the power system.

Product Compliance and Certification

ABB REC670 1MRK002814-AC strictly follows international and domestic power equipment standards and has passed multiple authoritative certifications, including IEC 60255 series standards (General Standards for Relay Protection Devices), GB/T 14285-2006 (Technical Regulations for Relay Protection and Safety Automatic Devices), etc., ensuring that the product meets industry standards in terms of safety, reliability, compatibility, and can be safely applied in power systems in different regions around the world.