ABB 1MRK000007-7 Smart Grid Protection Equipment
Product Brief Description
The ABB 1MRK000508-BDR02 and 1MRK000007-7 line protection devices are truly the “guardians” of high-voltage power grids! As a line differential protection unit in the REL650 series, it adopts advanced fiber optic differential principle, with an operating time of less than 15 milliseconds, enabling rapid and accurate fault isolation in transmission line faults. It supports the IEC61850 communication protocol, easily connecting to intelligent substation systems. Rest assured, we only sell genuine original products, with comprehensive technical support and after-sales service!
Rated Voltage: 110-500kV
Operating Time: ≤15ms
Communication Protocol: IEC61850
Fiber Optic Interface: STM-1/STM-4
Operating Temperature: -40℃~+70℃
Product Details
ABB 1MRK000508-BDR02 Technical Specifications
Product Model: ABB 1MRK000508-BDR02 1MRK000007-7
Manufacturer: ABB Group
Product Type: Digital Line Differential Protection Device
Application: Main protection of high-voltage transmission lines
Rated Voltage: 110kV-500kV
Rated Current: 1A/5A
Operating Time: ≤15ms (twice the setting value)
Differential Principle: Phase-by-phase current differential protection
Sampling Frequency: 4800Hz
Communication Interface: 2×Ethernet ports, 2×STM-1 fiber optic ports
Communication Protocol: IEC 61850-8-1, IEC60870-5-103
Fiber Optic Rate: 155Mbps/622Mbps
Operating Power Supply: 110/220VDC or 100/220VAC
Power Consumption: Normal ≤20W, Tripping ≤30W
Operating Temperature: -40℃~+70℃
Storage Temperature: -40℃~+85℃
Protection Rating: IP40
Installation Method: 19-inch rack mounting
Weight: Approx. 9.2kg
ABB 1MRK000508-BDR02 Product Overview
Speaking of ABB 1MRK000508-BDR02 1MRK000007-7, it’s a “technical benchmark” in the field of power grid protection. This is a line differential protection device in the ABB REL650 series, specifically responsible for the main protection of transmission lines with voltage levels of 110kV and above. Employing the principle of phase-separated current differential protection, the ABB 1MRK000508-BDR02 1MRK000007-7 achieves full-line fast-acting protection by comparing the phasor sum of currents at both ends of the line in real time via a fiber optic channel.
In practical applications, the most impressive feature of the ABB 1MRK000508-BDR02 1MRK000007-7 is its “precise judgment capability.” Through the STM-1/STM-4 fiber optic channel, it can accurately identify faults within the protection zone and quickly trip the circuit breaker within 15 milliseconds. In particular, its capacitor current compensation function effectively addresses the impact of distributed capacitance current on differential protection in long lines. Many relay protection specialists in power grid companies have stated that after using the ABB 1MRK000508-BDR02 1MRK000007-7, the correct operation rate of line protection has directly increased to 99.99%.
Key Features and Advantages
In terms of protection performance, the ABB 1MRK000508-BDR02 1MRK000007-7 achieves industry-leading performance. Employing adaptive braking characteristics, it automatically adjusts the braking coefficient based on the fault current, ensuring sensitivity to high-resistance grounding faults within the zone while preventing false tripping during faults outside the zone. In particular, its current transformer (CT) disconnection interlocking function effectively prevents malfunctions caused by current transformer abnormalities.
Its communication capabilities are exceptionally strong, supporting dual fiber optic channel hot standby with a channel switching time of less than 50 milliseconds. It employs a 64-bit CRC checksum and a 128-bit encryption algorithm to ensure the integrity and security of communication data. The device also supports IEEE 1588 precision time synchronization, achieving a time synchronization accuracy of 1 microsecond between the two ends, ensuring the accuracy of differential calculations.
Its reliability design is outstanding, utilizing a fully sealed shielded enclosure with electromagnetic compatibility meeting the IEC 60255-26 standard. The circuit board uses a six-layer PCB design, and key chips have undergone aging screening at temperatures ranging from -40℃ to +125℃. The mean time between failures (MTBF) exceeds 150,000 hours, fully meeting the stringent reliability requirements of the power grid.
Application Fields
The ABB 1MRK000508-BDR02 1MRK000007-7 line differential protection device delivers exceptional performance in high-voltage transmission systems. Its phase-segregated current differential principle provides complete fault coverage for transmission lines up to 500kV, with operating times under 15 milliseconds for internal faults. The device’s fiber optic communication capabilities ensure reliable data exchange between line terminals, even over long distances.
In smart grid applications, this protection unit supports seamless integration through IEC 61850 communication, enabling real-time data sharing with substation automation systems. The device’s adaptive characteristic settings automatically adjust to varying system conditions, maintaining protection reliability during network reconfigurations. Its robust construction withstands harsh substation environments, ensuring continuous operation in temperature extremes from -40°C to+70°C.
The protection relay excels in multi-terminal line applications,where its advanced algorithm accurately identifies fault locations in complex network configurations.The device’s comprehensive Fault recording capabilities provide detailed event analysis, supporting post-fault system restoration and protection scheme optimization.
Application Areas
In 500kV ultra-high voltage transmission networks, ABB 1MRK000508-BDR02 1MRK000007-7 is the “main force” of line protection. A single transmission line can easily stretch hundreds of kilometers, and a fault can affect the entire regional power grid. This differential protection device can quickly and accurately disconnect faults at any point on the line, ensuring stable grid operation. Many provincial power grids use ABB 1MRK000508-BDR02 1MRK000007-7 as the standard main protection for 500kV lines.
In the construction of smart substations, ABB 1MRK000508-BDR02 1MRK000007-7 demonstrates its capabilities thanks to its IEC61850 support. By directly exchanging sampled values through the process layer network, it simplifies secondary wiring and improves system reliability. In particular, its GOOSE tripping mechanism reduces tripping time by more than 30% compared to traditional methods.
ABB 1MRK000508-BDR02 1MRK000007-7 is also widely used in renewable energy transmission lines. Wind and solar power transmission lines often need to cope with power fluctuations; the adaptive characteristics of this device can automatically adjust protection settings to ensure reliable operation under various operating conditions.
Selection Guide/Purchase Advice
When selecting a device, pay attention to several key points: First, confirm the voltage level; ABB 1MRK000508-BDR02 1MRK000007-7 is suitable for 110kV-500kV systems. Second, consider the line length; if it exceeds 100 kilometers, select a higher-precision capacitor current compensation function.
When purchasing, always ensure you buy genuine original products. Counterfeit products on the market use substandard communication chips. The ABB 1MRK000508-BDR02 and 1MRK000007-7 units supplied by Shenzhen Changxin are all original products, each with an independent factory testing report. Special reminder: A channel delay test must be performed during commissioning to ensure time synchronization between the two ends of the device.
Frequently Asked Questions (FAQ)
Q: Can the ABB 1MRK000508-BDR02 and 1MRK000007-7 be used for three-terminal lines?
A: Fully supported! The device can be configured with up to four communication ports, meeting the differential protection requirements of three-terminal or even four-terminal lines.
Q: How does the protection activate when the fiber optic cable is interrupted?
A: The device will automatically switch to the backup channel. If all channels are interrupted, differential protection will be blocked, and backup protection will automatically activate.
Q: How to check the device’s health status?
A: The device’s self-test function allows you to view key indicators such as communication quality and sampling accuracy, enabling timely handling of any problems.
Customer Case Study
Last year, in a line protection project for an ultra-high voltage (UHV) project, the ABB 1MRK000508-BDR02 1MRK000007-7 performed exceptionally well. The 1000kV line exceeded 300 kilometers in length, making it difficult for traditional protection systems to balance sensitivity and reliability. This differential protection device perfectly solved the challenge of protecting long lines through precise capacitor current compensation.
Even more impressive was its application in complex networks. The customer was initially troubled by protection coordination issues. The intelligent logic programming function of the ABB 1MRK000508-BDR02 1MRK000007-7 made protection configuration simple and flexible, and the system is now operating exceptionally stably. The operations and maintenance manager said, “This is the level of intelligent protection we should have!”
Related Products
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ABB REL670: Transformer Differential Protection
ABB REF650: Feeder Protection Device
ABB REM650: Motor Protection Device
ABB REC650: Capacitor Protection Device
ABB RET650: Transformer Protection Device
ABB REG650: Generator Protection Device
ABB RES650: Automatic Transfer Switch
ABB REQ650: Reactive Power Compensation Control
ABB REL551: Medium Voltage Line Protection
Installation and Maintenance
Pre-Installation Preparation: Before installation, teachers should complete three preparations: First, confirm the fiber optic link quality, ensuring optical attenuation is within acceptable limits; second, check the TA secondary circuit wiring to ensure correct polarity; finally, verify the setting sheet, especially ensuring the braking coefficient and starting value are set appropriately.
Maintenance Recommendations: Conduct a comprehensive inspection every six months, including protection logic testing, channel delay measurement, and time synchronization accuracy check. If an increase in the optical communication bit error rate is detected for ABB 1MRK000508-BDR02 1MRK000007-7, promptly check the fiber optic connectors. It is recommended to keep a spare of the same model as an emergency backup; critical lines should ideally have backup protection devices. Shenzhen Changxin maintains a year-round inventory, allowing for 24-hour delivery in emergencies.
Product Guarantee
Shenzhen Changxin is fully confident in the quality of ABB 1MRK000508-BDR02 1MRK000007-7, offering an 18-month warranty. Any quality issues will result in a direct replacement. More importantly, we have a professional technical team providing 24/7 support, available on call for everything from setting calculations to fault analysis. Having cultivated deep expertise in power system protection for many years, we understand the paramount importance of protection reliability for grid security. Therefore, every ABB 1MRK000508-BDR02 1MRK000007-7 line differential protection device undergoes rigorous testing before shipment to ensure your peace of mind. Shenzhen Changxin’s warehouse maintains ample stock year-round, allowing for rapid response to urgent projects, ensuring that customers’ grid security is never compromised due to waiting for spare parts.
Our Commitment to Quality Assurance
At Shenzhen Changxin, we guarantee the performance of every ABB 1MRK000508-BDR02 1MRK000007-7 line differential protection device through comprehensive testing procedures. Each unit is verified to meet original manufacturer specifications and comes with 18-month warranty coverage. Our technical team provides expert…