Reyrolle 7SR220
The Reyrolle 7SR220 series relays include directional control of the overcurrent and earth fault functionality. They are typically installed where fault current can flow in either direction (i.e. on interconnected systems).
The functionality of this relay allow highly flexible settings for current and time grading, making it compatible with all types of overcurrent protection.
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Basic Features
- Relays have five current and four voltage inputs, and are housed in E6 or E8 cases.
- Provides integrated logic to allow optimal configuration of relay functionality with relays analogue inputs and binary input/output circuits
- Provides optional auto-reclose (79) feature which offers an integrated solution for use on overhead line (OHL) feeders
- 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 as standard, with additional ports available as options
- 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)
- Protection from neutral voltage displacement (59N)
- Protection from under/over frequency (81)
- Trip & close circuit supervision (74T/CCS)
- Inrush detector (81HBL2)
- Circuit breaker fail (50BF)
- 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