PD IEC/TR 61000-2-14:2006
Current
The latest, up-to-date edition.
Electromagnetic compatibility (EMC) Environment. Overvoltages on public electricity distribution networks
Hardcopy , PDF
English
31-01-2006
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Description of overvoltages
4.1 General
4.2 External overvoltages
4.3 Internal overvoltages
4.4 Overvoltage waveshape
5 Long duration overvoltages
5.1 Sustained earth faults
5.2 Broken neutral on LV network
5.3 Maloperation of voltage regulating equipment
5.4 Overvoltages due to voltage unbalances
5.5 Dispersed generation
6 Short duration overvoltages
6.1 Earth faults
6.2 Load rejection (sudden load loss)
6.3 Self-excitation
6.4 Resonance and ferroresonance
7 Very short duration overvoltages (transients)
7.1 General description
7.2 Lightning
7.3 Switching
7.4 Summary of surge duration and cause
8 Effects of overvoltages on equipment
8.1 General considerations
8.2 Reduction in life of filament lamps
8.3 Effect of overvoltages on IT equipment
9 Case studies
9.1 General
9.2 Switching of LV power factor correction capacitor
9.3 Metal fusion furnace
9.4 Switching of MV power factor correction capacitor
9.5 DC traction system
9.6 Load switching
10 Protection against the effects of overvoltages
10.1 General considerations
10.2 Point on wave switching
10.3 Arcing horns and spark gaps
10.4 Overvoltage protection relays
10.5 Snubbers (high frequency RC filter)
10.6 Uninterruptible power supply (UPS) systems
10.7 Surge protection device (SPD)
11 Conclusions
12 Recommendations
Bibliography
Figures
Tables
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