Siemens Reyrolle 7SR1003 Argus Overcurrent Protection Relay
The Siemens Reyrolle 7SR1003 is a numerical non-directional overcurrent and earth fault protection relay designed for current-based protection in distribution and industrial applications. Built using advanced hardware technology, it provides reliable and cost-effective protection, monitoring, and communication functions
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
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
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