ABB 1MRK002311-AAR02
The ABB 1MRK002311-AAR02 is a high-performance analog input module designed by the ABB Group for its Relion® 670 series protection relay family. In power system protection and control, this module plays a key role as an "accurate sensor," specifically used for high-precision collection of AC current and voltage signals in power grids. Equipped with advanced signal processing technology, the ABB 1MRK002311-AAR02 module can accurately condition, isolate, and digitize the secondary side signals from Current Transformers (CT) and Voltage Transformers (VT), providing reliable measurement data for protection relays.
Product Parameters
Product Model: 1MRK002311-AAR02
Manufacturer: ABB
Product Type: Analog Input Module (for protection relays)
Applicable Device: Relion® 670 series protection relays
Input Channels: 6 analog input channels
Signal Type: AC current/voltage (from CT/VT)
Rated Input: Current: 1A or 5A (configurable); Voltage: 100V or 110V (configurable)
Frequency Range: 45-65Hz (rated 50/60Hz)
Measurement Accuracy: ±0.5% of reading (typical value)
Sampling Rate: 4800Hz (80 samples/cycle @ 60Hz)
A/D Resolution: 16-bit Σ-Δ ADC
Isolation Voltage: 2.5kV RMS (between channel and system)
Temperature Coefficient: <50ppm/°C
Operating Temperature: -40°C to +70°C
Power Consumption: Maximum 1.5W (from backplane)
Certifications: IEC 60255, IEEE C37.90, UL 508
Structure and Composition
The ABB 1MRK002311-AAR02 module adopts a robust metal housing design, complying with the modular standards of the Relion 670 series. The front panel is equipped with status indicators and identification labels, facilitating on-site identification and status monitoring. Its internal structure is based on a high-performance signal processing architecture, including multi-channel precision signal conditioning circuits, anti-aliasing filters, high-precision Σ-Δ Analog-to-Digital Converters (ADC), digital isolators, and microprocessor units. Each input channel uses an independent signal conditioning path, including a programmable gain amplifier, low-pass filter, and sample-and-hold circuit. A high-precision reference voltage source ensures measurement stability, while digital isolators provide 2.5kV electrical isolation to guarantee system safety. The module connects to the Relion 670 host backplane via a multi-pin connector at the rear, enabling power supply acquisition and data exchange.
Key Features and Advantages
High-Precision Measurement Performance: The ABB 1MRK002311-AAR02 delivers high-precision measurement of ±0.5% and 16-bit resolution. Its high sampling rate of 4800Hz ensures accurate capture of power signal waveforms, providing a reliable data foundation for protection functions.
Excellent Anti-Interference Capability: The module meets the surge immunity requirements of the IEEE C37.90 standard, featuring 2.5kV isolation capability and excellent EMC performance to ensure stable operation in the harsh electromagnetic environment of substations.
Flexible Configuration Capability: It supports configuration of multiple rated input values (1A/5A, 100V/110V). Parameters can be easily set and calibrated via ABB’s PCM600 engineering tool, adapting to different application needs.
Comprehensive Diagnostic Functions: It is equipped with self-monitoring and diagnostic capabilities, which can detect signal anomalies, hardware faults, and other statuses. These statuses are reported via front-panel indicators and communication interfaces, facilitating maintenance and fault troubleshooting.
Application Fields
The ABB 1MRK002311-AAR02 module is specifically applied to protection and control in medium and high-voltage power systems. In substation automation systems, it is used for signal collection in devices such as line differential protection, distance protection, and overcurrent protection; in power plants, it serves as the measurement input for generator protection and transformer protection; in distribution networks, it is used for feeder protection and control; in industrial power systems, it is applied to large motor protection and bus protection. It is an ideal choice for all protection applications that require high-precision power parameter measurement.
Installation and Maintenance
Pre-Installation Preparation
Before installing the ABB 1MRK002311-AAR02 module, ensure that the power supply of the protection device is completely disconnected. Confirm the compatibility of the Relion 670 chassis model, and check that the backplane slots and connectors are in good condition. Prepare appropriate CT/VT secondary wiring, ensuring compliance with power safety specifications.
Maintenance Recommendations
Regularly check the module status and measurement accuracy via the PCM600 software. It is recommended to perform accuracy verification every 2 years to ensure measurement accuracy. When replacing the module, first disconnect the device power supply, record the current configuration parameters, insert the new module in the correct direction, and verify the function after restoring the parameters.
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