Siemens SIPROTEC 4 7VK61 User Manual

SIPROTEC 4
Breaker Management
Device 7VK61
V4.7 and higher
Manual
C53000-G1176-C159-5
Preface
Open Source Software
Table of Contents
Introduction
1
Functions
2
Mounting and Commissioning
3
Technical Data
4
Ordering Information and Accessories
A
Terminal Assignments
B
Connection Examples
C
Default Settings and Protocol-dependent
Functions
D
Functions, Settings, Information
E
Literature
Glossary
Index

Siemens SIPROTEC 4 7VK61 Specifications

General

Series	SIPROTEC 4
Model	7VK61
Rated Frequency	50/60 Hz
Current Transformer Inputs	3
Voltage Transformer Inputs	3
Device Type	Protection Relay
Binary Inputs	Up to 24
Binary Outputs	4
Protection Functions	Overcurrent, Earth Fault
Communication Protocols	IEC 61850, Modbus
Mounting	Panel Mount
Operating Temperature	-25 °C to +55 °C
Standards	IEC 60255, IEC 61850, IEEE C37.90
Inputs	Binary inputs
Outputs	4

Summary

Introduction

Overall Operation

Describes the SIPROTEC 4 7VK61 relay's system structure, including analog inputs, microcomputer system, and power supply.

Application Scope

Details the 7VK61 relay's multi-purpose use, protective functions, control functions, and communication capabilities.

Device Characteristics

Outlines general features, automatic reclosure, synchronism/voltage check, overcurrent, breaker failure, voltage protection, CFC, command processing, and monitoring functions.

Functions

General Device Functions

Covers device startup, configuration via DIGSI, parameter entry, functional scope, and setting notes for device functions.

Automatic Reclosure Function

Explains the automatic reclosure function, its activation, selectivity, initiation modes, blocking, and various reclosure cycle parameters.

Overcurrent Protection

Details the time overcurrent protection function with four stages, characteristic curves, logic diagrams, and settings for definite and inverse time stages.

Synchronism and Voltage Check

Covers the function to ensure network stability during switching by comparing voltage magnitudes, phase angles, and frequencies.

Under and Over-voltage Protection

Describes protection against undervoltage and overvoltage for phase-to-earth, phase-to-phase, positive sequence, and negative sequence systems.

Circuit Breaker Failure Protection

Explains rapid back-up fault clearance when the circuit breaker fails to respond, including current flow monitoring and auxiliary contact evaluation.

Monitoring Functions

Details hardware and software monitoring, measurement supervision, external transformer circuit checks, and current/voltage symmetry.

Function Control and Circuit Breaker Test

Covers the device's control center, applications like line energization, closure detection, and circuit breaker testing procedures.

Auxiliary Functions

Includes processing of messages, operational measured values, fault record data storage, and statistics.

Command Processing

Describes initiating switching operations, control authorization, command types, sequence in the command path, and interlocking.