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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

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