3. Protective devices
This category includes devices designed to prevent lightning striking a phase conductor of an overhead line, as well as devices designed to reduce transient overvoltages caused by lightning or switchgear operations.
3.1 Protection against lightning strikes
The aim is to provide lightning data and practical procedures used by electricians for two very specific purposes:
on the one hand, estimate the number of lightning strikes likely to be picked up by an overhead line ;
secondly, position the ground wire of an overhead line in relation to the phase conductors, so that lightning strikes dangerous to the line insulation are picked up by the ground wire (or screen) and not by the phase...
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Protective devices
Lines and substations: selecting and coordinating insulators
References
CIGRÉ brochures
Standardization
International Electrotechnical Commission
- Techniques des essais à haute tension. 1re partie : définitions et prescriptions générales relatives aux essais (NF C 41-101). - CEI 60-1 - 1989
- Insulation coordination. 1re part: terms, definitions, principles and rules (NF C 10-100). - CEI 71-1 - 1993
- Coordination de l'isolement. 2e partie : guide d'application (NF C 10-102). - CEI 71-2 - 1996
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