ENV 50123-7-1 : 1998
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
RAILWAY APPLICATIONS - FIXED INSTALLATIONS - D.C. SWITCHGEAR - MEASUREMENT, CONTROL AND PROTECTION DEVICES FOR SPECIFIC USE IN D.C. TRACTION SYSTEMS - APPLICATION GUIDE
28-03-2003
12-01-2013
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
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