Risk Assessment

The regulations UNE 21186, NFC 17102 and NP 4426 contain a method for assessing the risk of lightning, extracted from the international standard IEC 62.305-2, which determines the necessary protection systems. The following program is a simplified and automated version of this method, in order to make it more accessible to everyone. If a more precise calculation is required, or more complex structures, please contact us.

The aforementioned regulations include 3 parameters for calculating the risk index:

  • The number of dangerous events per year.
  • The probability of damage to a structure.
  • The losses in case of damage.

1. Dangerous events are divided into 4 types, depending on how they can reach the structure:

  • Events in the structure.
  • Events near the structure.
  • Events in power lines that affect the structure.
  • Events near power lines that affect the structure.

2. The probability of damages is divided among three parameters:

  • Direct injuries to living beings.
  • Physical damage to the structure.
  • Damage to electrical and electronic systems.

3. The losses are divided into 4 types:

  • Human losses.
  • Losses of service.
  • Losses of cultural heritage.
  • Economic losses.

Protection against lightning is necessary when the calculated risk exceeds the tolerable risk set out in the regulations.

Start
1
2
3
4
5
6
7
8
9
10
11
12

PROJECT DATA

Los campos marcados con * son necesarios para continuar.

STRUCTURE

Los campos marcados con * son necesarios para continuar.

L, W, H
Dimensions in meters of the structure, which allow to calculate the lightning capture area of the structure.

Only necessary if there is a point significantly higher than the rest of the structure, such as antennas, bell towers, towers, etc. Hp will be the height from the ground to the highest point.

Construction material of the structure, which provides electromagnetic shielding to the interior.

The risk of fire that the structure has, according to the material of its construction and its content.

ENVIRONMENTAL

Los campos marcados con * son necesarios para continuar.

The situation of the height of the structure with respect to the environment.

The environment where the structure is located.

ELECTRICAL LINES

Los campos marcados con * son necesarios para continuar.

The situation of the electrical connection of the structure.

If the electrical connection is shielded or not.

If the electrical connection has a transformer that protects from surges.

If the electrical connection is shielded or not.

LOSSES – Type 1: Human

Los campos marcados con * son necesarios para continuar.

The possibility of loss of human life caused by a fire, depending on the usual occupation.

The possibility of loss of human life caused by panic, depending on the number of people, their mobility, etc.

The possibility of economic losses caused by possible environmental contamination.

The possibility of loss of human life caused by surges, depending on the type of structure.

LOSSES – Type 2: Services

Los campos marcados con * son necesarios para continuar.

The possibility that there are losses of public services and that subscribers see their service affected, according to sector.

LOSSES – Type 3: Cultural Heritage

Los campos marcados con * son necesarios para continuar.

The probability of cultural heritage losses due to fires

LOSSES – Type 4: Economic

Los campos marcados con * son necesarios para continuar.

The possibility of economic losses caused by possible environmental contamination.

The possibility of economic losses caused by a possible fire.

The possibility of economic losses caused by surges.

The possibility of economic losses due to the death of beasts, depending on whether or not they are inside the structure.

PROTECTION

Los campos marcados con * son necesarios para continuar.

If there is a lightning protection system according to the regulations, the level of protection it has.

If there is a surge protection system according to the regulations.

The electrical protection measures for humans and animals.

The fire prevention measures that exist in the structure.

ADVANCED PARAMETERS

Los campos marcados con * son necesarios para continuar.

If you do not have enough information about it, do not modify the data that appears by default.

(max: 1000 m)

(if air)

The type of terrain whose characteristics affect the human loss factor.

The location where humans can be with respect to the structure.

POSITION

Los campos marcados con * son necesarios para continuar.

Indicates the location of lightning rods and grounding rods on the diagram.

Sending Result

Los campos marcados con * son necesarios para continuar.