Siemens 7SR1102 Protection Relay

Feature & Principle

It belongs to Siemens Reyrolle Argus 7SR11 series numerical protection relay. It samples current signals via four CT inputs and provides non-directional phase overcurrent, earth fault, breaker failure and load unbalance protection. It supports configurable IEC/ANSI inverse time curves, fault event recording and electrical measurement. Front USB interface is for local parameter setting, rear RS485 port supports multi communication protocols to connect SCADA system. This model is discontinued and used as maintenance spare for medium voltage distribution switchgear.

Specifications

Model: 7SR1102 Brand: Siemens Reyrolle Series: Argus-C CT input: 1A / 5A, 50/60Hz I/O: 3 binary inputs, 5 binary outputs Communication: USB front, RS485 rear; Modbus RTU, IEC60870-5-103, DNP3.0 Housing: E4 flush mount case Application: Medium voltage distribution feeder, industrial power network protection cabinet Certification: CE

Components & Diagnostics

Signal sampling circuit, main processing unit, front LED indicators, USB & RS485 communication circuit, relay output contacts. Common faults: communication interruption, measurement deviation, false tripping, parameter loss, power supply failure.

Product Brief

7SR1102 protection relay, Siemens Reyrolle Argus-C non-directional overcurrent spare widely used for distribution switchgear overhaul and replacement.