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Monitoring
Undervoltage detector (25), Differential-voltage detector (25), Voltage levels (live and dead status) (25), Close-circuit supervision (74), VT Fail (60).
Why Reyrolle 7SR157?
The Reyrolle 7SR157 Argus is a combined check and system synchronizing relay. It performs controlled closing of circuit breakers by precisely measuring line and bus voltages.
Uncontrolled circuit breaker closure can lead to operational issues. The Reyrolle 7SR157 prevents closure if differences in phase angle, slip frequency or voltage magnitude fall outside prescribed limits. When parameters are within limits, the relay issues an output to close the circuit breaker for safe and reliable system operation.
Comprehensive instrumentation and fault data include integrated input and output logic, data logging and fault reports. Access relay functionality through a front USB port for local PC connection or a rear electrical RS485 port for remote connection to support informed decision-making and easy troubleshooting.
Key benefits
Protect your system
Prevent circuit breaker closure when voltage parameters are outside prescribed limits. Protect your equipment and personnel while minimizing risks from grid instability.
Improve stability
Precisely control circuit breaker closing and synchronization. Integrate into complex grid systems to improve stability and efficiency while delivering reliable power flow.
Access data and insights
Access instrumentation, fault data and integrated input/output logic. Use data logging and fault reports to draw comprehensive insights and make informed decisions for proactive maintenance.
Featured Capabilities
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Control
Voltage trim (magnitude and phase) (25), System-split detector (25), Check synchronizing (25), Check synchronizing close guard (25), System synchronizing (25), Close on zero synchronizing (25), System-split lockout (25).
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Monitor System Stability
Ensure system stability by monitoring critical voltage parameters. The relay detects undervoltage, differential voltage, and live/dead line status, while also supervising the close-circuit and voltage transformer integrity.