Siemens Reyrolle 7SR17 Motor Protection Relay
The Siemens Reyrolle 7SR17 Rho is a numerical motor protection relay designed for industrial motor applications. It supports four current inputs and optionally three voltage inputs, providing integrated protection, thermal supervision, and motor start monitoring. The relay can operate standalone or interface with external temperature sensors via communication ports. It includes configurable logic, multiple communication protocols including IEC 61850, and a draw-out E4 enclosure for flexible installation.
Technical Specifications
Protection Functions:
• Stall Protection (14)
• Under/Over Voltage (27/59)
• Power/Power Factor (32/55)
• Undercurrent (37)
• Current Unbalance (46)
• Phase Reversal (46Ph Rev)
• Voltage Unbalance (47)
• Start Protection (48/66)
• Motor Thermal Overload (49R)
• Directional Overcurrent (67)
• Directional Earth Fault (67G/67N)
• Backspin Protection (81B)
• Under/Over Frequency (81)
• High Impedance REF (87REF)
• Temperature Inputs via RTD/Comms Port
Supervision Functions:
• Circuit Breaker Fail (50BF)
• CT Supervision (60CTS)
• VT Supervision (60VTS)
• Trip Circuit Supervision (74T/CCS)
Monitoring Functions:
• Instrumentation
Main Features:
• Optional RTD inputs
• Cold Load Settings
• Eight Setting Groups
• Password Protection
• Self Monitoring
• Circuit Breaker Trip Counter
• Fault, Event, and Waveform Records
• Stall Protection (14)
• Under/Over Voltage (27/59)
• Power/Power Factor (32/55)
• Undercurrent (37)
• Current Unbalance (46)
• Phase Reversal (46Ph Rev)
• Voltage Unbalance (47)
• Start Protection (48/66)
• Motor Thermal Overload (49R)
• Directional Overcurrent (67)
• Directional Earth Fault (67G/67N)
• Backspin Protection (81B)
• Under/Over Frequency (81)
• High Impedance REF (87REF)
• Temperature Inputs via RTD/Comms Port
Supervision Functions:
• Circuit Breaker Fail (50BF)
• CT Supervision (60CTS)
• VT Supervision (60VTS)
• Trip Circuit Supervision (74T/CCS)
Monitoring Functions:
• Instrumentation
Main Features:
• Optional RTD inputs
• Cold Load Settings
• Eight Setting Groups
• Password Protection
• Self Monitoring
• Circuit Breaker Trip Counter
• Fault, Event, and Waveform Records
You too can leave a comment about this product
