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Siemens 7SR105 Rho

Siemens 7SR105 Rho
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Answers for energy.
7SR105 Rho User Manual
Motor Protection Relay
Reyrolle
Protection
Devices

Table of Contents

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Siemens 7SR105 Rho Specifications

General IconGeneral
Rated Frequency50/60 Hz
Operating Temperature-25°C to +55°C
Voltage Supply24-250 V DC / 48-265 V AC
Rated Current1 A or 5 A
Protection FunctionsOvercurrent, Earth Fault
Communication InterfaceRS485
ProtocolsModbus RTU, DNP3
MountingDIN rail
Storage Temperature-40°C to +70°C

Summary

Description of Operation

Introduction

Provides an overview of the relay's functionality and purpose.

Hardware Description

Details the physical components and modules of the relay.

Protection Functions

Explains the various protection algorithms and their settings.

Supervision Functions

Covers the monitoring and supervisory features of the relay.

Control and Logic Functions

Describes motor start/stop, user logic, and other control functionalities.

Other Features

Details data communications, CB maintenance, data storage, and metering.

Symbols and Nomenclature

Explains the symbols and terminology used throughout the document.

Safety Precautions

Outlines critical safety measures for installation and operation.

Ordering Options

Lists available variants and configurations for ordering.

Functional Diagram

Provides a block diagram of the relay's internal functions.

Terminal Diagram

Shows the physical terminal connections for wiring the relay.

Settings and Instruments

Introduction

Introduces the relay's menus, display structure, and operating modes.

Setting & Configuring the Relay Using Reydisp Evolution

Guides users on connecting and configuring the relay via software.

Fault Data Mode

Explains how to access and interpret fault records stored in the relay.

Performance Specification

Indication of Conformity

States compliance with relevant directives and standards.

Technical Specifications

Details the relay's electrical, communication, and mechanical specifications.

Environmental Performance

Outlines environmental test conditions and requirements.

Performance Specification

Provides detailed settings and tolerance limits for protection functions.

Data Communications Definitions

Introduction

Describes communication interfaces and protocols used by the relay.

Physical Connection

Details the physical ports (USB, RS485) and connection methods.

IEC 60870-5-103 Definitions

Explains the IEC 60870-5-103 protocol implementation and data points.

MODBUS Definitions

Details the MODBUS-RTU protocol implementation and register data types.

DNP3 Definitions

Explains the DNP3 protocol, device profile, and point lists.

Additional Settings

Covers DNP3 implementation settings like unsolicited mode and timeouts.

Installation Guide

Installation

Provides step-by-step instructions for installing the relay physically.

Temperature Input Connection Diagram

Illustrates how to connect temperature sensors to the relay.

Environmental Protection Hints

Offers guidance on product disposal and environmental compliance.

Commissioning and Maintenance Guide

Troubleshooting

Lists common problems and their recommended solutions for the relay.

Applications Guide

Introduction

Provides an overview of plant design principles related to motors.

Protection Functions

Guides on applying and setting protection functions for motors.

Current Transformer (CT) Requirements

Details CT ratio selection and requirements for protection applications.

Supervision and Monitoring Functions

Explains the application of supervision functions like 50BCL, 81B, 60CTS, etc.

Control & Logic Functions

Covers user-defined logic and motor start/stop control examples.

Application Examples

Provides function and connection diagrams for common applications.

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