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Lightning Rod

How Air Terminals work?

Generally, lightning will strike the highest point of any structure or facility.A lightning protection system does not prevent lightning from striking; it provides a means for preventing damage by providing a low resistance path for the discharge of lightning energy. An air terminal is used to capture the lightning strike to a preferred point so that the discharge current can be safely directed by means of a down conductor(s) to the ground. The down conductor provides a low impedance path from the air terminal to the ground so that lightning can be safely conducted to the earth, without causing excessive large voltages

Protective radius through the rolling sphere method

Rolling sphere radius of a conventional air terminal

The rolling sphere radius of conventional air terminals depending on protective levels are shown in IEC 62305-1, and thus the probabilities for the limits of the lightning currents of conventional air terminals are following the table of IEC 62305-1..

Protection level Radius of Rolling Sphere Minimum Lighting Current Probability
1 20 m 3 kA 99 %
2 20 m 5 kA 97 %
3 30 m 10 kA 91 %
4 40 m 16 kA 84 %

Rolling sphere radius of a conventional air terminal

The rolling sphere radius of conventional air terminals depending on protective levels are shown in IEC 62305-1, and thus the probabilities for the limits of the lightning currents of conventional air terminals are following the table of IEC 62305-1..

Protection level Radius of Rolling Sphere Minimum Lighting Current Probability
1 20 m 3 kA 99 %
2 20 m 5 kA 97 %
3 30 m 10 kA 91 %
4 40 m 16 kA 84 %
  • X-Trap

    X-trap thumb

    IPrimSolution Corporation is proud to offer our new product of ESE air terminal for structure lighting protection. By utilizing advanced ion discharging technology, The X-TrapTM provides lightning protection to facilities that would otherwise be difficult or cost prohibitive to protect by convent...

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  • Prevectron series

    Prevectron series thumb

    Early triggering of the upward leader using a system of spark ionization between the upper electrodes and the central tip. The PREVECTRON®’s ability to trigger an upward leader ahead of any other protruding point within the protected area ensures it will be the preferential point of impact for...

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  • Griffin series

    Griffin series thumb

    - The most suitable rod type lightning rod for the revised
    KS C IEC 62305
    - Reasonable Price
    - Superior protection efficiency
    - Stainless steel construction
    - Good Design

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  • VAJRA(TM) series

    VAJRA thumb

    The VAJRATM is one of the high voltage pulse type air terminals, which has the largest protective radius in the world. The VAJRATM utilizes dvanced method that generates high voltage inside the rod through use of semiconductor electric circuit and constructed with the anti-corrosive stain...

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  • PLUS series

    PLUS series thumb

    • The Plus ESE air terminal stabilizes the ionization process through regular corona effects and produces streamers regularly.
    • The Plus ESE air terminal increases streamer emission heights to drive downward reader to the predetermined point of lightning strike.

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  • Saint-Elmo series

    Saint-Elmo series thumb

    Saint-Elmo consists of CAPTURE HEAD, SUPPORT POLE and TRANSDUCER (piezoelectric stimulator). TRANSDUCER is built in the lower part of the pole and consists of piezoelectric ceramics stressed in an insulating container, which is combined with simple and completely reliable loadi...

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  • FRANKLIN-Rod

    FRANKLIN-Rod thumb

    High quality mechanical air terminal, the FRANKLIN-Rod uses the mechanical(non electric circuitry) streamer emission method, which is in contrast with the high voltage pulse type ESE air terminals, uses the mechanical air insulation destruction mechanism.

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  • Lightning Counter

    X-trap thumb

    The ALC-100 is a lightning current counter that counts the number of current pulses occurring with lighting in the down conductor of a extra lighting protective system or the grounding conductor in a building. The ALC-100 would make it to be convenient for the LPS supervisor to man...

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  • Horizontal Conductor

    Horizontal Conductor thumb

    The previous lightning protective system are not used same material and has not endurance for the long term outside exposure. But this horizontal conductor (conducting wire, supporter, and extension joint) are consist of same material of aluminum. So it can be protect corrosion...

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