SIEMENS 7SR224 REYROLLE OVERCURRENT PROTECTION RELAY
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Product Description
Siemens 7SR224 Reyrolle Overcurrent Protection Relay
7SR224 series relays include for directional control ofthree phase overcurrent and earth fault functionality and typically installedas an integral controller for a pole mounted recloser. The controller offers anintegrated auto-reclose solution for use on OHL feeders.The relay functionalityallows highly flexible settings for current and time grading making itcompatible with all types of overcurrent protections.Relays have four current andfour voltage inputs and are housed in E10 cases.Integrated logic is provided toallow the optimal configuration of relay functionality with the relays analogueinputs and binary input/output circuits.Protection, instrumentation andmetering functionality is accessible via data comms channel(s). A front USBport for local PC connection and rear electrical RS485 port for remoteconnection are provided as standard, additional ports are available as options.
PROTECTION FUNCTIONS
- Undercurrent (37)
- Broken Conductor (46BC)
- Negative Phase Sequence Overcurrent (46NPS)
- Thermal Overload (49)
- Overcurrent (50, 51)
- Earth Fault (50G, 50SEF, 51G, 51SEF)
- High Impedance REF (64H)
- Under/Over Voltage (27/59)
- Negative Phase Sequence Voltage (47)
- Voltage Controlled Overcurrent (51V)
- Neutral Voltage Displacement (59N)
- Directional Control of Overcurrent & Earth Fault (67)
SUPERVISION FUNCTIONS
- CT Supervision (60CTS)
- Trip & Close Circuit Supervision (74T/CCS)
- VT Supervision (60VTS)
- Inrush Detector (81HBL2)
- Circuit Breaker Fail (50BF)
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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