1MRK002239 Differential Current Protection Unit
Product Brief Description
ABB 1MRK002239: This differential protection relay is the “guardian” of power equipment! As a high-precision protection device in the ABB RED670 series, it is specifically designed to provide the most reliable differential protection for power transformers, generators, and large motors. Utilizing advanced ratio braking characteristics, it accurately distinguishes between internal faults and normal operating conditions, serving as a “stabilizing force” for the safe operation of power systems. Genuine original product, superior performance, worry-free after-sales service with Shenzhen Changxin!
ABB 1MRK002239: This differential protection relay is the “guardian” of power equipment! As a high-precision protection device in the ABB RED670 series, it provides the most reliable differential protection for power transformers, generators, and large motors. Utilizing advanced ratio braking characteristics, it accurately distinguishes between internal faults and normal operating conditions, serving as a “stabilizing force” for the safe operation of power systems. Genuine original product, superior performance, purchase from Shenzhen Changxin for worry-free after-sales service! Protection Type: Differential Protection
Rated Current: 1A/5A (Configurable)
Operating Power Supply: 48-250V DC/AC
Binding Characteristics: Ratio Binding
Communication Protocol: IEC 61850
Product Details
ABB 1MRK002239 Technical Specifications
Product Model: ABB 1MRK002239
Manufacturer: ABB
Product Type: Differential Protection Relay
Product Series: RED670
Rated Current: 1A/5A (Configurable)
Operating Power Supply: 48-250V DC/AC
Power Consumption: Typical 20W
Frequency: 50/60Hz
Protection Functions: Differential Protection, Overcurrent Protection, Thermal Overload Protection
Binding Characteristics: Ratio Binding
Harmonic Binding: 2nd/5th Harmonic Binding
CT Disconnection Detection: Yes
Communication Protocol: IEC 61850, Modbus, DNP3
Digital Inputs: 16 channels
Digital Outputs: 10 channels
Analog Inputs: 12 channels
Operating Temperature: -25°C to +55°C
Storage Temperature: -40°C to +70°C
Protection Rating: IP40
Installation Method: Cabinet Mounting
Dimensions: 177mm × 170mm × 157mm
Weight: Approx. 3.2kg
Certification Standards: IEC 60255, IEEE C37.90
ABB 1MRK002239 Product Overview
This ABB 1MRK002239 is a “powerful force” in power system protection! As a differential protection device in the ABB RED670 series, it is specifically designed to provide the most reliable protection for the most critical equipment in power systems—transformers, generators, and large motors. This device uses advanced differential protection principles, comparing the vector sum of currents on each side of the equipment to identify internal faults in milliseconds and achieve selective tripping. In practical applications, the ABB 1MRK002239 demonstrates remarkable accuracy. Its advanced ratio braking characteristic effectively distinguishes between internal fault currents and through-currents caused by external faults, preventing false tripping. In particular, its harmonic braking function identifies inrush current and over-excitation, ensuring no false tripping when the transformer is closed under no-load conditions. Many large substations and power plants use it as their primary protection system because of its reliable characteristics: “It will trip when it should, and it remains stable when it shouldn’t.”
Key Features and Advantages
High-Precision Differential Protection: The ABB 1MRK002239 employs advanced sampling technology and algorithms to achieve microsecond-level data acquisition and processing. Its measurement accuracy reaches 0.5 class, accurately capturing minute changes in differential current. In particular, its adaptive braking characteristic automatically adjusts the braking coefficient according to the system’s operating status, ensuring both sensitivity and preventing false tripping.
Comprehensive Auxiliary Protection: In addition to primary differential protection, the ABB 1MRK002239 integrates complete backup protection functions, including overcurrent protection, zero-sequence protection, and thermal overload protection, forming a complete protection solution. This “one-stop-shop” design saves cabinet space and simplifies secondary wiring.
Powerful Fault Recording: The device has a built-in large-capacity memory that can record 128 fault waveforms. The current and voltage waveforms, switch status, and protection action sequence are completely recorded for each fault, providing first-hand data for accident analysis. It supports COMTRADE format for easy analysis in professional software.
Application Areas
Power Transformer Protection: In substations with voltage levels of 110kV and above, the ABB 1MRK002239 serves as the main protection for transformers, monitoring the current on each side in real time. Its ratio braking characteristics effectively overcome special situations such as transformer inrush current and overexcitation, ensuring correct operation only during internal faults.
Large Generator Protection: In generator protection for thermal, hydroelectric, and nuclear power plants, the ABB 1MRK002239 provides complete differential protection. It accurately identifies stator winding phase-to-phase and turn-to-turn short circuits, preventing fault escalation and damage to the generator.
Large Motor Protection: In the protection of large motors under critical loads (such as steel mill rolling mills and cement mills), the ABB 1MRK002239 provides sensitive differential protection, compensating for the sensitivity deficiencies of conventional overcurrent protection.
Related Products
ABB RED670: Distance protection device in the same series
ABB RET670: Transformer protection device
ABB REG670: Generator protection device
ABB REL670: Reactor protection device
ABB REC670: Capacitor protection device
ABB RES670: Busbar protection device
Installation and Maintenance
Preparation before installation: Before installing ABB 1MRK002239, confirm that the CT polarity is correct and the turns ratio is consistent. The insulation resistance of the secondary circuit should be greater than 10MΩ, and the grounding resistance of the protection panel should be less than 0.5Ω. The device address setting must be unique, and the communication parameters must be consistent with the monitoring system.
Maintenance recommendations: Regularly check whether the sampling values of ABB 1MRK002239 are accurate and whether the differential current is within the normal range. Perform a drive test annually to verify the protection logic. Upgrade the software version promptly, but always back up the configuration before upgrading. Fault recording files should be analyzed regularly to identify potential problems promptly.
Product Guarantee
We guarantee that every ABB 1MRK002239 differential protection relay is a genuine ABB product with complete traceability. Each unit undergoes a 72-hour aging test and functional verification to ensure reliability after commissioning. We provide a 36-month warranty, a 15-minute technical response time, and 4-hour emergency on-site service. Shenzhen Changxin has extensive experience in power system protection, safeguarding the security of your grid!
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