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Siemens Reyrolle 5 7SR51 Overcurrent & Feeder Protection Relay
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Technical Specifications
Multiple I/O configurations (from 4 CT + 8 BI + 6 BO up to 4 CT + 4 VT + 39 BI + 20 BO)
Standard IEC 61850, DNP 3.0, MODBUS-RTU, IEC 60870-5-103 protocols
Withdrawable design, 6U or 12U housing
128×128 LCD graphical display with mimic diagrams
Protection Functions: 50/51 Overcurrent, 50N/51N Earth Fault, 46 Negative Sequence, 49 Thermal Overload, 50BF Breaker Failure, 81 Frequency, 87GH/NL REF, 67 Directional OC and EF, 25 Synchrocheck, 21 Fault Locator, etc.
Monitoring of currents, voltages, power, energy, frequency and event/waveform recording
USB front port, RS485, RJ45 or Optical Ethernet rear ports
Applications: Feeder, Backup Protection, Transformer, Generator and Busbar Protection
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