Reyrolle 7SR17
The Reyrolle 7SR17 Rho is a numeric protection relay with four current inputs and three optional voltage inputs. The relay is applied to motors and their connections, providing an integrated protection system.
It includes thermal protection optimised for motor applications and motor starting supervision algorithms. Numerous other protections are also provided and can be selected as required to achieve an appropriate solution.
Basic Features
- Typically used as a stand-alone device but can be supplied with an external unit to interface with remote temperature detectors embedded in the motor or installed on auxiliary equipment
- Housed in an E4 case
- Provides full user configurability and integrated logic which allows optimal configuration of relay input and output functionality
- Password protection
- Circuit breaker trip counter
- Fault, event, and waveform records
- Stall protection (14)
- Protection from under/over voltage (27/59)
- Protection from power/power factor (32/55)
- Protection from undercurrent (37)
- Current unbalance protection (46)
- Phase reversal (46Ph Rev)
- Protection from voltage unbalance (47)
- Start protection (48/66)
- Motor thermal overload (49R)
- Directional overcurrent (67)
- Directional earth fault (67G/67N)
- Backspin protection (81B)
- Protection from under/over frequency (81)
- Circuit breaker fail (50BF)
- Trip circuit supervision (74T/CCS)