EXTERNAL LIGHTNING PROTECTION -  LIGHTNING RODS

A system of absolute protection against lightning is mainly composed of two forms of protection systems, depending on their functionality:

External system: Including the various systems used to cover the structures or buildings, as well as open and people against direct lightning strikes areas.

Internal system: Systems are surge protection suitable for safeguarding facilities and networks connected to electricity, telephone, and data communication equipment.

 

DIFFERENT TYPES OF EXTERNAL PROTECTION:

There are two types of external protection:

Passive protection systems:

It is a protection system that does not perform any prior action to lightning strike, its functionality is executed when lightning strikes the structure in charge of driving and dissipate the energy of lightning to the ground.

It is the system comprising:

Active protection systems:

The active protection system performs pre-action to the lightning strike, the priming system emits an ionization creating a shock return to the cloud directed channelling and directing the beam to a safe and ready for download point.

It is the system comprising:

Active protection offers a number of advantages over other types of protection:

  • Protection not only of the structure, also around or open areas.
  • Ease of installation, reducing the price of labour. It is much cheaper.
  • Less visual impact, having a less bulky installation, protected building aesthetically not altered significantly.
PDC sistema activo pararrayos

 

STANDARDS:

Implementing rules for a system of effective protection of persons and property:

  • UNE 21186:2011: Lightning protection - Lightning rods with priming device.
  • NF C 17-102:2011: Protection contre la foudre - Systèmes de protection contre la foudre à dispositif d’amorçage.
  • NP 4426:2013: Proteção contra descargas atmosféricas - Sistemas com dispositivo de ionização não radioativo.

In addition to these, there may be legislation or specific to each country must be taken into account norms.

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