Siemens SIPROTEC 7SS52 User Manual

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Siemens SIPROTEC 7SS52 Specifications

General

Rated Frequency	50/60 Hz
Frequency	45 Hz to 65 Hz
Display	Graphical LCD
Operating Temperature	-25 °C to +55 °C
Binary Inputs	8
Communication Protocols	IEC 61850, DNP3, Modbus
Protection Functions	Overcurrent, Earth Fault, Voltage Protection
Communication Interfaces	Ethernet
Mounting	Panel Mount
Housing	Metal Housing

Summary

Distributed Busbar/Circuit Breaker Failure Protection SIPROTEC 7SS52 Operation Manual

2 Product Description

2.1 Application

2.2 Features

2.3 Scope of Functions

Detailed scope of functions for busbar protection and CB failure protection.

4 Mode of Operation

4.1 Operation of Complete Unit

4.3 Busbar Protection

Detailed explanation of busbar protection principles and characteristics.

4.6 Circuit-breaker Failure Protection

Detailed modes and functions of circuit-breaker failure protection.

5 Installation Instructions

5.2.1 Connection of the Bay Units in the Bus Coupler Bay

5.3 Configuration Examples

Practical examples illustrating busbar and bus coupler configuration.

6 Operating Instructions

6.1 Setting the Master Unit

Guide to operating the master unit via keypad, including integrated display and communication software.

6.2 Setting the Protection

Detailed instructions for setting protection parameters for busbar and CB failure protection.

6.3 Operating the Bay Unit

Instructions for operating the bay unit, including keypad/display functions and control keys.

6.5 Testing and Commissioning

Procedures for testing and commissioning the protection system.

7 Maintenance

7.2 Fault Analysis

Methods for analyzing faults, including operational events and failure causes.

7.2.5 Fault Indication and Analysis of the Fault Buffer