SIEMENS 7SR210 NON-DIRECTIONAL OVERCURRENT PROTECTION RELAY

Product Description

SIEMENS 7SR210 NON-DIRECTIONAL OVERCURRENT PROTECTION RELAY

The 7SR210 series of relays provide overcurrent and earthfault protection. These relays are typically applied to provide the mainprotection on feeders and interconnectors and the backup protection on items ofplant such as Transformers, Relays have four current inputs and are housed inE6 or E8 case.7SR220 series relays include for directional control of theovercurrent and earth fault functionality and are typically installed wherefault current can flow in either direction i.e. on interconnected systems.Relays have five current and four voltage inputs they are housed in E6 or E8cases.Integrated logic is provided to allow the optimal configuration of relayfunctionality with the relays analog inputs and binary input/output circuits.The optional auto-reclose feature offers an integrated solution for use on OHLfeeders.The relay functionality allows highly flexible settings for current andtime grading making it compatible with all types of overcurrentprotections.Protection, instrumentation and metering functionality isaccessible via data comms channel(s). A front USB port for local PC connectionand rear electrical RS485 port for remote connection 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, 50N, 50SEF, 51G, 51N, 51SEF)
• Directional Control of Overcurrent & Earth Fault (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 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