Siemens Reyrolle 7SR220 Overcurrent Relay – 5xI, 4xV
The Siemens Reyrolle 7SR220 Overcurrent Relay is a highly reliable directional protection relay designed for advanced feeder and overcurrent protection. Equipped with 5xI and 4xV inputs, it ensures precise fault detection and performance in demanding electrical networks. Widely used by utilities, industries, and EPC contractors in Mumbai, it provides system stability, reduces downtime, and supports directional overcurrent and earth fault protection
Technical Specifications
Inputs: 5xI, 4xV
Flexible settings for current and time grading
Protection Functions: Undercurrent (37), Broken Conductor (46BC), Negative Phase Sequence Overcurrent (46NPS), Thermal Overload (49), Overcurrent (50,51), Earth Fault (50G,50N,50SEF,51G,51N,51SEF), Directional Control (67), High Impedance REF (64H), Under/Over Voltage (27/59), Negative Phase Sequence Voltage (47), Voltage Controlled Overcurrent (51V), Neutral Voltage Displacement (59N), Under/Over Frequency (81)
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 & Earth, Line & Phase Voltages, Apparent Power & Power Factor, Real & Reactive Power, Wh & VArh Forward/Reverse, Historical Demand Records, PPS/NPS/ZPS Voltages & Currents
Suitable for utilities, industrial plants, and EPC projects in Mumbai
Flexible settings for current and time grading
Protection Functions: Undercurrent (37), Broken Conductor (46BC), Negative Phase Sequence Overcurrent (46NPS), Thermal Overload (49), Overcurrent (50,51), Earth Fault (50G,50N,50SEF,51G,51N,51SEF), Directional Control (67), High Impedance REF (64H), Under/Over Voltage (27/59), Negative Phase Sequence Voltage (47), Voltage Controlled Overcurrent (51V), Neutral Voltage Displacement (59N), Under/Over Frequency (81)
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 & Earth, Line & Phase Voltages, Apparent Power & Power Factor, Real & Reactive Power, Wh & VArh Forward/Reverse, Historical Demand Records, PPS/NPS/ZPS Voltages & Currents
Suitable for utilities, industrial plants, and EPC projects in Mumbai
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