Overcurrent and feeder protection

Overcurrent and feeder protection - 7SR51

Reyrolle 7SR51

The Reyrolle 7SR511 overcurrent device includes a wide range of protection functions and IEC 61850 Ethernet communications as standard.

Reyrolle 5 Virtual Relay

Explore the relay

Overcurrent and feeder protection Reyrolle 7SR51

Features & functions

The large LCD, tactile pushbuttons and programmable LEDs provide a user-friendly product interface and the relay element is withdrawable for easy replacement. To further minimize the product variants the power supply and the binary inputs with configurable binary input threshold cover the full operating range.

Features

The Reyrolle 5 is designed for the electricity networks of the future with enhanced communications and cybersecurity

while maintaining a user-friendly interface and easy product management.

 

The Reyrolle 7SR511 overcurrent device includes a wide range of protection functions and IEC 61850 Ethernet communications as standard. To further minimize the product variants the power supply and the binary inputs cover the full operating range with configurable binary input thresholds.

 

The large LCD, tactile pushbuttons and programmable LEDs provide a user-friendly product interface and the relay element is withdrawable for easy replacement.

 

Inputs and outputs

4 CT + 8 BI + 6 BO

4 CT + 13 BI + 8 BO

4 CT + 23 BI + 12 BO

4 CT + 38 BI + 18 BO

4 CT + 4 VT + 9 BI + 8 BO

4 CT + 4 VT + 14 BI + 10 BO

4 CT + 4 VT + 19 BI + 12 BO

4 CT + 4 VT + 39 BI + 20 BO

5 CT + 4 VT + 17 BI + 10 BO

5 CT + 4 VT + 37 BI + 18 BO

 

Communication
Standard front USB port (for configuration using Reydisp PC based software tool) rear RS485 2 x RJ45 electrical ports or optional optical ethernet connections.

 

Housing
Size 6 or 12 withdrawable design.

 

Display

Backlit 128 x 128 LCD with text and graphical display capabilities suitable for single line mimic diagrams.

Functions

Standard functionality

  • 37/ 37G undercurrent protection
  • 46 Negative sequence overcurrent protection
  • 46BC Broken conductor detection
  • 49 Thermal overload protection
  • 49TS Temperature sensor supervision
  • 50/ 50N/ 50G  Instantaneous overcurrent
  • 50AFD Arc flash detection
  • 50BF Circuit-breaker failure protection – 3 pole
  • 50GHS High speed earth fault – measured 
  • 50GI Intermittent earth faul
  • 50GS Instantaneous sensitive earth fault – measured
  • 50HS High speed overcurrent – phase
  • 50SOTF Switch onto fault
  • 51/ 51N/ 51G Time delayed overcurrent
  • 51CL Cold load overcurrent – phase
  • 51GS Time delayed sensitive earth fault – measured
  • 52 Circuit-breaker control
  • 60CTS CT supervision
  • 74TC/ 74CC Trip-circuit and close-circuit supervision
  • 79 Automatic reclosing
  • 81HB2 Inrush current detection
  • 86 Lockout
  • 87GH Restricted earth fault protection – high-impedance
  • 87NL Restricted earth fault protection – low-impedance

Additional functionality – 7SR5111 Directional

  • 21FL Fault locator
  • 21LB Load blinder
  • 25 Synchrocheck – synchronising function
  • 27/27Vx Undervoltage protection
  • 32 Power protection
  • 47 Sequence overvoltage protection
  • 51V Voltage dependent overcurrent – phase
  • 55 Power factor
  • 59/ 59Vx Overvoltage protection
  • 59N Neutral voltage displacement
  • 60VTS VT supervision
  • 67/67G/67GI/67GS/67N Directional – phase/earth fault
  • 78VS Voltage vector shift
  • 81 Frequency protection – "f>" or "f<"
  • 81R Frequency protection – "df/dt“

Monitoring functions

  • Primary, secondary and phase sequence current & voltage
  • Frequency, power, energy and fault location
  • Fault data, event and waveform records

Communication

  • IEC 60870-5-103, MODBUS-RTU, DNP3 serial, IEC 61850, MODBUS TCP

Applications

  • Overcurrent and earth fault protection for medium voltage substations
  • Backup protection for other main protection devices e.g. on lines, transformers, generators, motors, and busbars
  • 5 CT model to provide measured standby earth fault for protection of transformer earthing resistors in addition to high-impedance earth fault protection
  • Selectable directional overcurrent and earth fault elements for interconnected systems
  • Measured and calculated earth fault protection elements provide a flexible solution when both earth fault and sensitive earth fault current detection is required
  • Detection of earth faults in all networks including isolated and compensated networks
  • High speed overcurrent elements for use with arc fault detectors to provide high speed fault detection and tripping
  • Blocked overcurrent schemes using hardwiring or configurable IEC 61850 elements
  • Configurable automatic reclosing to restore power flow after transient network faults

 

Benefits

 
  • Setting to select display of alternative languages on the front fascia LCD: French, German, Portuguese, Spanish and Turkish
  • Compact design and low product life-cycle cost
  • Reliable operation due to powerful, proven protection algorithms
  • IEC 61850 Edition 1 & 2 with HSR, PRP and RSTP operation for increased availability
  • Simple product ordering  
  • 28 programmable tri-color LEDs for clear indications
  • Combined 1 A and 5 A current transformer inputs
Information

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