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
Type: 7SR110 Argus Non-Directional Relay
Application: Feeder, industrial, and utility protection
Operation: Non-directional
Power Supply: AC/DC universal supply
Case Type: Non-draw-out, compact design
Communication: USB (front), RS485 (rear) – MODBUS RTU / IEC 60870-5-103
Mounting: Panel-mounted
Display: LCD with LED indicators
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 Overcurrent & Earth Fault (67)
High Impedance Restricted Earth Fault (64H)
Under/Over Voltage (27 / 59)
Negative Phase Sequence Voltage (47)
Voltage-Controlled Overcurrent (51V)
Neutral Voltage Displacement (59N)
Supervision & Monitoring:
CT Supervision (60CTS)
VT Supervision (60VTS)
Trip & Close Circuit Supervision (74T/CCS)
Inrush Current Detection (81HBL2)
Circuit Breaker Failure Protection (50BF)
Key Benefits:
Precise fault detection & system reliability
Compact and durable design
Siemens-authorized service support
Fast delivery & local stock availability
