I.S. EN 50123-7-1:2003
Current
The latest, up-to-date edition.
RAILWAY APPLICATIONS - FIXED INSTALLATIONS - D.C. SWITCHGEAR - PART 7-1: MEASUREMENT, CONTROL AND PROTECTION DEVICES FOR SPECIFIC USE IN D.C. TRACTION SYSTEMS - APPLICATION GUIDE
Hardcopy , PDF
English
01-01-2003
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
1 Scope
2 Normative references
3 Definitions
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 Undervoltage 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
A.1 Scope
A.2 Failures
Annex B (informative) Rate of rise and (delta)I relay
Examples for fault characteristic and setting
parameter selection
B.1 Scope
B.2 Rate of rise detection
B.3 (delta)I Protection
B.4 Combined di/dt and (delta)I protection
Annex C (informative) Bibliography on relays in use
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