Lightning Masts

Lightning masts are an effective way to protect a wide variety of fixed and portable installations from lightning damage. Lightning masts are usually not mounted to the object that they protect. They are designed to project well above the protected area, and are place near, but not touching the protected objects.

Mast may be used to protect equipment within substation against lightning. … Each point of equipment is laid out in substation with its height. Then, the equipment height at each point is compared with the corresponding critical protection height to determine whether equipment are protected or not.

It’s not true that lightning masts attract lightning. … Lightning masts (or “air terminals,” as they’re known in the lightning protection business) provide a preferential path – a path of low resistance – for lightning to flow to the ground around the house. “Cell phones, small metal items, jewelry, etc., do not attract lightning. Nothing attracts lightningLightning tends to strike taller objects,” said John Jensenius, a NOAA National Weather Service lightning expert. “People are struck because they are in the wrong place at the wrong time.

Do lightning masts actually work? Lightning masts intercept this voltage, providing a safe path for lightning current into the ground. They do not decrease the likelihood your home may be struck, but provide a direct path to ground, preventing damage to your home from fire, explosion, and electrical surges that can result from lightning strikes. Lightning masts (and the accompanying protection system) are designed to protect a house or building from a direct lightning strike and, in particular, a lightning-initiated fire. There is no good reason why lightning masts (and the associated assembly consisting of a connection to earth and a ground rod) are not routinely added to houses. Perhaps it’s because the chance of a lightning strike is, for most houses, quite low.

Lightning rods are pointed so a charge will be concentrated at the end. If the rod had a round end the charges would spread equally around its surface. As long as the air is prevented from ionizing it won’t conduct the lightning bolt. The purpose of the rod is to prevent ionization by discharging the ions in the air.

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