Siemens Reyrolle 7SR11 Nondirectional Overcurrent Protection Relay
Description
Siemens Reyrolle 7SR11
Siemens Reyrolle 7SR11 Overcurrent Relay functionality allows highly flexible settings for current and time grading making it compatible with all types of overcurrent protection.
Siemens Reyrolle 7SR11 Relay Features
The relay functionality allows highly flexible settings for current and time grading making it compatible with all types of overcurrent protection.
The relays are available in single and four-pole variants housed in E4 cases with the IEC 61850 protocol option housed in an E6 case. Integrated logic is provided to allow the optimal configuration of relay functionality with the relays analog inputs and binary input/output circuits.
Protection, instrumentation, and metering functionality is accessible via data comms channel(s). A front USB port for local PC connection or rear electrical RS485 port for remote connection is provided.
- Cold load settings
- Four settings groups
- Password protection – 2 levels
- User-programmable logic
- Self-monitoring
- Circuit breaker trip counter and timer
- Fault, event, and waveform records
Protection Functions
- Undercurrent (37)
- Broken Conductor (46BC)
- Negative Phase Sequence Overcurrent (46NPS)
- Thermal Overload (49)
- Overcurrent (50, 51)
- Earth Fault (50G, 50N, 50SEF, 51G, 51N, 51SEF)
- Directional Control of Overcurrent & Earth Fault (67)
- High Impedance REF (64H)
- Under/Over Voltage (27/59)
- Negative Phase Sequence Voltage (47)
- Voltage Controlled Overcurrent (51V)
- Neutral Voltage Displacement (59N)
Reyrolle 7SR11 Supervision Functions
- CT Supervision (60CTS)
- Trip & Close Circuit Supervision (74T/CCS)
- VT Supervision (60VTS)
- Inrush Detector (81HBL2)
- Circuit Breaker Fail (50BF)
Reyrolle 7SR11 Control Functions
- Auto Reclose (79)
Monitoring Functions
- Primary/Secondary Current Phases and Earth Direction
- Primary/Secondary Line and Phase Voltages
- Apparent Power and Power Factor
- Real and Reactive Power
- W Hr & VAr Hr Forward and Reverse
- Historical Demand Record
- Positive Phase Sequence (PPS) Voltage & Current
- Negative Phase Sequence (NPS) Voltage & Current
- Zero Phase Sequence (ZPS) Voltage
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