SIEMENS Reyrolle 7SR45 Argus self-powered/dual powered non-directional overcurrent and earth fault relay

NONDIRECTIONALOVERCURRENT PROTECTION REYROLLE 7SR45 NUMERICAL RELAY

The Reyrolle 7SR45 Argus self-powered/dual powered non-directionalovercurrent and earth fault relay is developed using the latest generation ofhardware technology and is available in multiple variants depending on thecurrent transformer (CT), binary input/binary output, power supply, andcommunication configuration.

The Reyrolle 7SR45 numeric relay provides both definite time and inversetime overcurrent and earth fault protection functions ensuring sensitivity witha minimum operate setting of 0.2 â‹… I ratedfor phase overcurrent protection. The relay is CT powered with an option forconnection to an external auxiliary supply to provide additional security andcommunications port for connecting to SCADA. The compact non draw-out designprovides front fascia to the navigation keys, LCD, and front USB port for easeof use

1. Self-powered / auxiliary powered
2. 10 fault records
3. 100 event records
4. Password protection
5. Self-monitoring
6. Overcurrent protection functions (instantaneous and delayed)
7. Relay integration via Reydisp Evolution PC Software
8. Sensitivity of 20% nominal current
9. Serial interface

Hardware

1. 4 current transformer with 1 A or 5 A Inputs
2. Up to 4 binary Inputs and 4 binary outputs
3. 2 latched binary outputs, 1 changeover and 1 normally open
4. 1 pulsed output
5. 2 case options for mounting in various RMU's

User Interface

1.       2.       3.      4.      5.       6.        

Protection functions

1.       2.       3.       4.       5.       6.       7.       51N Time delayed earth fault -calculated

Ancillary functions

1. 49T High speed external trip via binary input
2. 68 Protection function blocking/Inrush current blocking
3. 86 Lockout

Communications

1. IEC 60870-5-103
2. MODBUS RTU