High Impedance Protection Reyrolle 7SR23
The Reyrolle 7SR23 high impedance protection device is specifically designed to provide comprehensive and configurable high impedance protection with enhanced functionality and performance.
It is a numeric high impedance circulating current relay that has four current inputs and is used as a unit protection to detect phase and earth faults. It can be applied to busbars, connections, transformers, reactors, and motors.
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Basic Features
- Used in ‘high impedance’ applications in conjunction with external stabilising resistors and non-linear resistors (metrosils)
- Standardised external components can be provided in an Epsilon case to facilitate design and installation
- Integral CT supervision feature detects open circuits in the CT secondary wiring circuits
- Housed in E6 or E8 cases
- Provides integrated logic to allow optimal configuration of relay input and output functionality
- Data communication channels allow access to protection, instrumentation, and metering functionalities
- A front fascia USB port for local connection and RS485 rear port for remote connection are provided as standard, with additional rear ports available as options
- Overall differential protection (87/50G)
- Restricted earth fault protection (87REF)
- Earth fault (50G)
- Fault clearance monitor (87/50BF)
- Password protection
- Fault, event, and waveform records