DD ENV 50123-7.1 : 1999

Superseded

Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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RAILWAY APPLICATION - FIXED INSTALLATIONS - D.C. SWITCHGEAR - MEASUREMENT, CONTROL AND PROTECTION DEVICES FOR SPECIFIC USE IN D.C. TRACTION SYSTEMS - APPLICATION GUIDE

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Superseded date: 15-07-2003

Language(s):

Published date: 23-11-2012

Publisher: British Standards Institution

Table of Contents - (Show below) - (Hide below)

National Foreword
Introduction
1. Scope
2. References
3. Definitions
    3.1 d.c. sensor
    3.2 d.c. shunt
    3.3 isolation transducer
    3.4 Hall effect sensor
    3.5 divider
4. Measurement
    4.1 General
    4.2 Current
    4.3 Voltage dividers
5. Control systems
    5.1 General
    5.2 Anti-pumping
    5.3 Auto-reclose with variable reclose time and final
         lock out
    5.4 Line test device
    5.5 Under voltage close inhibit
6. Protection systems
    6.1 General
    6.2 Protection system for line circuit breakers (L)
    6.3 Protection system for rectifier circuit breaker (R)
    6.4 Direct acting (series trip)
    6.5 Indirect acting
Annex A (informative) Electronic protection relay features
Annex B (informative) Rate of rise and delta I relay - Examples
                        for fault characteristic and setting
                        parameter selection
Annex C (informative) Bibliography on relays in use

Abstract - (Show below) - (Hide below)

Gives help, guidance and requirements for the design of protection, control and measuring systems in d.c. installations that are meant to give a power supply to traction systems. Identifies the characteristics and parameters of equipment which is used in the measurement, control and protection of d.c. traction systems.

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Committee	SC GEL/93
Document Type	Standard
ISBN
Pages
Published
Publisher	British Standards Institution
Status	Superseded
Superseded By	BS EN 50123-7-1:2003

International Equivalents – Equivalent Standard(s) & Relationship - (Show below) - (Hide below)

Equivalent Standard(s)	Relationship
ENV 50123-7-1 : 1998	Identical

Standards Referencing This Book - (Show below) - (Hide below)

EN 50123-1:2003	Railway applications - Fixed installations - D.C. switchgear - Part 1: General

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