Schneider Electric RL-V321-ABGAA-DAAC Feeder Protection Relay

Schneider Electric RL-V321-ABGAA-DAAC is a multifunctional numerical feeder protection relay designed for medium voltage distribution networks. It integrates protection, measurement, control and communication functions to safeguard distribution feeders, transformers and switchgear equipment in power substations.

This relay supports comprehensive overcurrent, earth fault, voltage and frequency protection functions. It features multiple communication interfaces for remote SCADA connection and built-in fault recording. Widely supplied as spare parts for utility power grid, industrial plant power distribution and substation automation upgrade projects.

Main Specifications

• Brand: Schneider Electric
• Model: RL-V321-ABGAA-DAAC
• Product Type: Numerical Feeder Protection Relay
• Protection Functions: Overcurrent, earth fault, voltage supervision, frequency protection
• Communication Protocols: Modbus TCP, Modbus RTU, IEC 60870-5-103
• Power Supply: 24–250 VDC / 85–265 VAC universal auxiliary supply
• Digital Inputs / Relay Outputs: Multi-channel binary I/O for interlock and trip circuits
• Data Storage: Fault event records, disturbance recording and metering data log
• Mounting: Standard panel mounting for medium voltage switchgear cabinets
• Operating Temperature Range: -20°C ~ +60°C

Core Functions

• Implement fast protection tripping for short circuit, overload and earth fault failures on MV feeders
• Monitor three-phase voltage, current, power and frequency parameters continuously in real time
• Provide auto-reclosing logic, circuit breaker control and interlock signal management
• Record fault waveforms, trip events and alarm logs for post-fault analysis and troubleshooting
• Support remote parameter setting, status monitoring via SCADA and engineering software
• Front panel LCD display enables local parameter checking, testing and manual operation
• Built-in hardware self-diagnosis to detect internal module and wiring abnormal conditions
• Flexible protection curve configuration adapts to various distribution network operation modes
• High anti-interference performance meets IEC standard requirements for substation environments
• Guarantee safe and stable operation of medium voltage power distribution systems

Application Scenarios

• Urban and rural power grid medium voltage substation feeder protection
• Industrial factory internal 10kV / 20kV power distribution switchgear systems
• Oil & gas plant, chemical plant auxiliary power supply protection cabinets
• Waste-to-energy, biomass and thermal power plant auxiliary distribution networks
• Mining, cement and metallurgy enterprise medium voltage power supply control systems
• Water treatment large pumping station medium voltage switchgear protection equipment
• Commercial complex, data center medium voltage distribution automation systems
• Wind farm and solar power station collector line protection control racks
• Substation automation renovation, equipment upgrade and spare parts replacement projects
• Schneider numerical protection relay spare parts inventory and field maintenance projects