Overview
The “Reyrolle 7SR11 & 7SR12 Argus” overcurrent protection series of relays provide overcurrent and earth fault protection. These relays are typically applied to provide the main protection on feeders and interconnectors and the backup protection on items of plant such as transformers. The 7SR12 includes directional control of the overcurrent and earth fault functionality and is typically installed where fault current can flow in either direction i.e. on interconnected systems.
For more detailed information on “7SR11 & 7SR12” relays, refer to Reyrolle devices documents.
To see other supported Reyrolle relays, click here.
Functional Diagrams
Summary of 7SR1 Relay Configurations
Current Protection Functions
Phase Overcurrent (67, 51, 50)
Logic Diagram: Directional Overcurrent Element (67)
Directional Overcurrent Element (67) Technical Data
Logic Diagram: Instantaneous Overcurrent Element (50)
Instantaneous Overcurrent Element (50) Technical Data
Logic Diagram: Time Delayed Overcurrent Element (51)
Time Delayed Overcurrent Element (51) Technical Data
Logic Diagram: Voltage Controlled Overcurrent Protection (51V)
Voltage Controlled Overcurrent Protection (51V) Technical Data
Derived Earth Fault (67N, 51N, 50N)
Logic Diagram: Derived Directional Earth Fault Element (67N)
Derived Directional Earth Fault Element (67N) Technical Data
Logic Diagram: Derived Instantaneous Earth Fault Element (50N)
Derived Instantaneous Earth Fault Element (50N) Technical Data
Logic Diagram: Derived Time Delayed Earth Fault Protection (51N)
Derived Time Delayed Earth Fault Protection (51N) Technical Data
Measured Earth Fault (67G, 51G, 50G)
Logic Diagram: Measured Directional Earth Fault Protection (67G)
Logic Diagram: Measured Instantaneous Earth-fault Element (50G)
Measured Instantaneous Earth-fault Element (50G) Technical Data
Logic Diagram: Measured Time Delayed Earth Fault Element (51G)
Measured Time Delayed Earth Fault Element (51G) Technical Data
Sensitive Earth Fault (67SEF, 51SEF, 50SEF)
Logic Diagram: SEF Directional Element (67SEF)
SEF Directional Element (67SEF) Technical Data
Logic Diagram: 7SR11 SEF Instantaneous Element (50SEF)
Logic Diagram: 7SR12 SEF Instantaneous Element (50SEF)
SEF Directional Element (67SEF) Technical Data
Logic Diagram: 7SR11 SEF Time Delayed Element (51SEF)
Logic Diagram: 7SR12 SEF Time Delayed Element (51SEF)
SEF Time Delayed Element (51SEF) Technical Data
High Impedance Restricted Earth Fault – (64H)
Logic Diagram: High Impedance REF (64H)
High Impedance REF (64H) Technical Data
Cold Load (51c)
Logic Diagram: Cold Load Settings (51c)
Negative Phase Sequence Overcurrent – (46NPS)
Logic Diagram: Negative Phase Sequence Overcurrent (46NPS)
Negative Phase Sequence Overcurrent (46NPS) Technical Data
Under-Current Detector (37)
Logic Diagram: Phase Current Inputs Undercurrent Detector (37)
Logic Diagram: Earth Current Inputs Undercurrent Detector (37G)
Logic Diagram: Sensitive Earth Current Inputs Undercurrent Detector (37SEF)
Undercurrent Detector (37) Technical Data
Thermal Overload (49)
Thermal Overload (49) Operating Time
Logic Diagram: Thermal Overload Protection (49)
Thermal Overload Protection (49) Technical Data
Thermal Overload Protection Curves
Line Check 50LC, 50G LC and 50SEF LC – Only software option ‘C’
Logic Diagram: 50G Line Check Elements (50G LC)
Logic Diagram: 50SEF Line Check Elements (50SEF LC)
Logic Diagram: 50 Line Check Elements (50LC)
Arc Flash Detector (50 AFD)
Logic Diagram: Arc Flash Detector (50 AFD)
Arc Flash Detector (50 AFD) Technical Data
Voltage Protection Functions
Phase Under/Over Voltage (27/59) – 7SR12
Logic Diagram: Under/Over Voltage Elements (27/59)
Under/Over Voltage Elements (27/59) Technical Data
Negative Phase Sequence Overvoltage (47) – 7SR12
Logic Diagram: NPS Overvoltage Protection (47)
NPS Overvoltage Protection (47) Technical Data
Neutral Overvoltage (59N) – 7SR12
Logic Diagram: Neutral Overvoltage Element (59N)
Neutral Overvoltage Element (59N) Technical Data
Under/Over Frequency (81) – 7SR12
Logic Diagram: Under/Over Frequency Detector (81)
Under/Over Frequency Detector (81) Technical Data
Power Protection Functions
Power (32) – 7SR12
Logic Diagram: Power Protection (32)
Power Protection (32) Technical Data
Sensitive Power (32S) – 7SR12
Logic Diagram: Sensitive Power Protection (32S)
Sensitive Power Protection (32S) Technical Data
Power Factor (55) – 7SR12
Logic Diagram: Power Factor Protection (55)
Power Factor Protection (55) Technical Data
Supervision Functions
Circuit Breaker Failure (50BF)
Logic Diagram: Circuit Breaker Fail Protection (50BF)
Circuit Breaker Fail Protection (50BF) Technical Data
VT Supervision (60VTS) – 7SR1205 & 7SR1206
Logic Diagram: VT Supervision Function (60VTS)
VT Supervision Function (60VTS) Technical Data
CT Supervision (60CTS)
Logic Diagram: CT Supervision Function (60CTS) – 7SR11
Logic Diagram: CT Supervision Function (60CTS) – 7SR12
CT Supervision Function (60CTS) Technical Data
Broken Conductor (46BC)
Logic Diagram: Broken Conductor Function (46BC)
Broken Conductor Function (46BC) Technical Data
Trip/ Close Circuit Supervision (74TCS & 74CCS)
Logic Diagram: Trip Circuit Supervision Feature (74TCS)
Logic Diagram: Close Circuit Supervision Feature (74CCS)
Trip/Close Circuit Supervision Feature (74TCS/74CCS) Technical Data
2nd Harmonic Block/Inrush Restraint (81HBL2) phase elements only
Functional Diagram for Harmonic Block Feature (81HBL2)
Harmonic Block Feature (81HBL2) Technical Data
General
IEC/ANSI Operate & Reset Curves
IEC IDMTL Curves (Time Multiplier=1)
ANSI IDMTL Operate Curves (Time Multiplier=1)
ANSI Reset Curves (Time Multiplier=1)
IEC Reset Curves (Time Multiplier=1)
Analog Inputs
AC Analog Currents
AC Analog Voltages
Binary Inputs/Outputs
Binary Input Logic
Binary Inputs Technical Data
Binary Output Logic
Binary Output Technical Data
