ABB 1MRK002311-AAR02
Product Name: REX521 Series Integrated Relay Protection Device
I. Basic Information
Brand: ABB
Model: 1MRK002311-AAR02
Product Series: REX521 Feeder Protection and Monitoring Device
Application Scenarios: Medium and Low Voltage Distribution Networks, Plant Power Supply, Switch Cabinet Protection
Main Functions
Protection Functions
Three-phase overcurrent protection, zero-sequence overcurrent grounding protection, overload alarm, overvoltage / low voltage protection, inverse-time overcurrent protection, fault recording.
Monitoring Functions
Collect three-phase current, three-phase voltage, power, frequency, energy, etc. electrical quantities; remote tripping and closing of circuit breakers based on switch position.
Communication Configuration
Support common power communication protocols such as Modbus and IEC 60870-5-103, and can be connected to the background DCS, integrated automation system to achieve remote monitoring. Auxiliary function
Event sequence recording (SOE), fault recording, local LCD display, key operation, fault alarm contact output.
Typical Applications
Plant utility high and low voltage feeder protection, 10kV/35kV line protection in substations, switch cabinet measurement and control protection, can achieve rapid circuit breaker tripping in case of line faults, avoiding the expansion of faults, and simultaneously complete real-time upload of circuit operation data.
Product Features
Integrated protection, measurement, control, and communication functions, embedded installation on the screen;
Strong anti-interference ability, suitable for strong electromagnetic environments such as power plants and substations;
Support for local/remote modification of protection settings, and convenient fault event recording for operation and maintenance fault analysis.
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