Technical Specifications
Type: Numerical overcurrent and earth fault relay (current-based protection)
Model: 7SR1003 (part of 7SR10 Argus family)
Measuring input: 1A / 5A, 50/60 Hz (site-selectable)
Auxiliary voltage: 60–240 V AC/DC
Binary inputs/outputs: 6 DI / 6 DO
CTs: 4 current transformers
LEDs: 10 status indicators
Communication: Front USB port and rear RS485 supporting IEC 60870-5-103 / Modbus RTU / DNP 3.0
Control: Front panel with circuit breaker control pushbuttons
Case: Size 4 molded case, 4U high, non-draw-out
Power supply: Universal (AC/DC)
Protection functions: 46BC, 46NPS, 49, 50, 50N/G, 51, 51N/G, 51C, 50BF, 51SEF, 81HBL2, 50SEF
Supervision: Trip Circuit (74TC), Total Harmonic Distortion (81THD)
Control: Lockout (86), Circuit Breaker Control (CB Control)
Applications: Distribution networks, substations, and industrial systems
Compliance: IEC 60255
Protection Functions:
Distance protection with 6 measuring systems (21/21N)
High resistance earth-fault protection (50N, 51N, 67N)
Earth-fault detection for isolated and resonant-earthed networks
Tele (pilot) protection (85)
Fault locator (FL)
Power swing detection/tripping (68/68T)
Phase-overcurrent protection (50/51)
Switch-onto-fault protection (50HS)
STUB bus overcurrent protection (50STUB)
Overvoltage/undervoltage protection (59/27)
Over/underfrequency protection (81O/U)
Auto-reclosure (79)
Synchro-check (25)
Breaker failure protection (59BF)
Thermal overload protection (49)
Control Functions:
Commands for control of circuit breakers and isolators
Monitoring Functions:
Trip circuit supervision (74TC)
Relay self-supervision
Measured-value supervision
Event and fault logging
Oscillographic fault recording
Switching statistics
Front Design:
Easy operation with numeric keypad and function keys
LEDs for local alarm indication
PC front port for DIGSI 4 configuration
Communication Interfaces:
Front interface for PC connection
System interface for control system communication:
IEC 61850 Ethernet
IEC 60870-5-103
PROFIBUS-FMS / DP
DNP 3.0
1 serial protection data interface for teleprotection
Rear-side service/modem interface
Time synchronization via IRIG-B, DCF77, or system interface
Monitoring Functions:
Operational measured values (6MD612 only)
Energy metering values (6MD612 only)
Time metering of operating hours
Self supervision of relay
Communication Interfaces:
IEC 61850 Ethernet
IEC 60870-5-103 protocol
PROFIBUS-FMS / PROFIBUS-DP
Service & front interface for DIGSI 4
Time synchronization via IRIG B / DCF77
Hardware & Other Functions:
Standard SIPROTEC hardware for easy DIGSI configuration
Full EMC compliance
Surface or flush mounting with included mounting rails
Available in three types with different IO counts
Key Benefits:
Seamless integration with SIPROTEC 4 units
Centralized or bay-level process connection
Industry-standard digital protection platform with DIGSI 4
Proven global reliability and ease of installation
Protection Functions:
• Stall Protection (14)
• Under/Over Voltage (27/59)
• Power/Power Factor (32/55)
• Undercurrent (37)
• Current Unbalance (46)
• Phase Reversal (46Ph Rev)
• Voltage Unbalance (47)
• Start Protection (48/66)
• Motor Thermal Overload (49R)
• Directional Overcurrent (67)
• Directional Earth Fault (67G/67N)
• Backspin Protection (81B)
• Under/Over Frequency (81)
• High Impedance REF (87REF)
• Temperature Inputs via RTD/Comms Port
Supervision Functions:
• Circuit Breaker Fail (50BF)
• CT Supervision (60CTS)
• VT Supervision (60VTS)
• Trip Circuit Supervision (74T/CCS)
Monitoring Functions:
• Instrumentation
Main Features:
• Optional RTD inputs
• Cold Load Settings
• Eight Setting Groups
• Password Protection
• Self Monitoring
• Circuit Breaker Trip Counter
• Fault, Event, and Waveform Records
