Siemens 7SR210 Non-Directional Overcurrent Protection Relay
The Siemens 7SR210 is a non-directional overcurrent protection relay designed for feeders, interconnectors, and plant equipment like transformers. It provides main and backup protection, with flexible settings for current and time grading. Equipped with multiple analog and binary inputs/outputs, USB and RS485 ports, and optional auto-reclose, it ensures reliable operation in modern power systems
Technical Specifications
Housed in E6 or E8 cases
Four current inputs and multiple voltage inputs
Integrated programmable logic
Optional auto-reclose for overhead line feeders
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 OC & EF (67), High Impedance REF (64H), Under/Over Voltage (27/59), Negative Phase Sequence Voltage (47), Voltage-Controlled OC (51V), Neutral Voltage Displacement (59N), Under/Over Frequency (81)
Supervision: CT (60CTS), VT (60VTS), Trip & Close Circuits (74T/CCS), Inrush Detector (81HBL2), Circuit Breaker Fail (50BF)
Control: Auto Reclose (79)
Monitoring: Primary/Secondary currents and earth direction, line and phase voltages, apparent and real/reactive power, energy (Wh, VArh), PPS/NPS/ZPS, historical demand records
Data communications channels for protection, instrumentation, and metering
Four current inputs and multiple voltage inputs
Integrated programmable logic
Optional auto-reclose for overhead line feeders
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 OC & EF (67), High Impedance REF (64H), Under/Over Voltage (27/59), Negative Phase Sequence Voltage (47), Voltage-Controlled OC (51V), Neutral Voltage Displacement (59N), Under/Over Frequency (81)
Supervision: CT (60CTS), VT (60VTS), Trip & Close Circuits (74T/CCS), Inrush Detector (81HBL2), Circuit Breaker Fail (50BF)
Control: Auto Reclose (79)
Monitoring: Primary/Secondary currents and earth direction, line and phase voltages, apparent and real/reactive power, energy (Wh, VArh), PPS/NPS/ZPS, historical demand records
Data communications channels for protection, instrumentation, and metering
You too can leave a comment about this product
