Motor protection
Reyrolle 7SR105
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.
Features
The device is housed in a 4U high, size 4 non-withdrawable 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.
Optional RTD inputs
Cold load settings
Two settings groups
Password protection
Self-monitoring
Circuit breaker trip counter
Fault, event and waveform records
Functions
Protection functions
Stall protection (14)
Undercurrent (37)
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)
Supervision functions
Circuit breaker fail (50BF)
CT supervision (60CTS)
Trip circuit supervision (74T/CCS)
Monitoring functions
Instrumentation
