Reyrolle 7SR105 Rho motor protection relay is a numerical protection relay intended for use in the motor protection applications. It provides a highly comprehensive functional software package with a range of integral application functions aimed at reducing installation, wiring, and engineering time.
The device is housed in a 4U high, size 4 non draw-out case and these relays provide protection, monitoring, instrumentation, and metering with integrated input and output logic, data logging and fault reports. Communication access to the relay functionality is via a front USB port for local PC connection or rear electrical RS485 port for remote connection.
A wide range of measured values can be viewed on the front LCD or remotely via the communications channel. The integrated control feature allows the safe operation of a motor and monitoring its start and stop operations.
Stall Protection (14)
Current Unbalance Protection (46)
Phase Reversal (46Ph Rev)
Start Protection (48/66)
Motor Thermal Overload (49R)
Time-overcurrent Protection (50/51)
Earth Fault (50/51G/N)
Backspin Protection (81B)
Temperature Inputs (RTD)
Circuit Breaker Fail (50BF)
CT Supervision (60CTS)
Trip Circuit Supervision (74T/CCS)
Optional RTD inputs
Cold Load Settings
Two Settings Groups
Circuit Breaker Trip Counter
Fault, event and waveform records
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