Reyrolle 5 7SR57
The Reyrolle 5 7SR57, a motor protection device, is designed for the electricity networks of the future with enhanced communications and cybersecurity while maintaining a user-friendly interface and easy product management.
It includes a wide range of protection functions and IEC 61850 Ethernet communications as standard. To further minimize the product variants, the power supply and the binary inputs cover the full operating range with binary input thresholds that can be configured.
Basic Features
- Large LCD, tactile pushbuttons and programmable LEDs provide a user-friendly product interface and the relay element is detachable for easy replacement
- Locked rotor protection (14)
- Protection from undercurrent – phase/earth (37/37G)
- Broken conductor detection (46BC)
- Phase-rotation reversal (46PR)
- Phase unbalance (46UB)
- Starting-time supervision (48)
- Motor thermal overload protection (49M)
- Temperature sensor supervision (49TS)
- Instantaneous overcurrent/earth fault (50/50N/50G)
- Arc flash detection (50AFD)
- Break capacity limit (50BCL)
- Circuit-breaker failure protection – 3 pole (50BF)
- Protection from time delayed overcurrent/earth fault (51/51G/51N)
- Circuit-breaker control (52)
- Close‑circuit and trip‑circuit supervision (74CC/74TC)
- Inrush current detection (81HB2)
- Lockout (86)
- Undervoltage protection (27/27Vx)
- Power protection (32)
- Sequence overvoltage protection (47)
- Power factor (55)
- Overvoltage protection (59/ 59Vx)
- Neutral voltage displacement (59N)
- Backspin monitor – voltage reference (81B-V)
- Motor differential protection (87M)
- Fault, event, and waveform records
- Motor start data log