Reyrolle 7SR120
The Reyrolle 7SR120 includes directional control of the overcurrent and earth fault functionality and is typically installed where fault current can flow in either direction (i.e. on interconnected systems). It is typically applied to provide main protection on feeders and interconnectors, and back-up protection on items in the plant (e.g. transformers). Overcurrent and earth fault protection devices are often the only protection installed in distribution system circuits.
The functionality of this relay allow highly flexible settings for current and time grading, making it compatible with all types of overcurrent protection.
Enquiry about Reyrolle 7SR120
Basic Features
- Available in single and four pole variants housed in E4 cases with IEC 61850 protocol option housed in an E6 case
- Provides integrated logic to allow optimal configuration of relay functionality with relays analogue inputs and binary input/output circuits
- Data communication channels allow access to protection, instrumentation, and metering functionalities
- Provides local PC connection via a front USB port and remote connection via a rear electrical RS485 port
- 2 levels of password protection
- Circuit breaker trip counter and timer
- Fault, event, and waveform records
- Protection from undercurrent (37)
- Protection from broken conductor (46BC)
- Protection from thermal overload (49)
- Protection from overcurrent (50, 51)
- Protection from earth fault (50G, 50N, 50SEF, 51G, 51N, 51SEF)
- Directional control of overcurrent & earth fault (67)
- Protection from under/over voltage (27/59)
- Trip & close circuit supervision (74T/CCS)
- Inrush detector (81HBL2)
- Circuit breaker fail (50BF)
- Auto reclose (79)
- Historical demand record
- Monitoring of primary/secondary current phases and earth direction
- Monitoring of primary/secondary line and phase voltages
- Monitoring of apparent power and power factor
- Monitoring of real and reactive power