Do lightning arresters need to be set up for 10kV distribution equipment and outdoor box change? Why?
Lightning conductor, also known as lightning protection needle, is used to protect buildings, tall trees and other devices to avoid lightning strikes. A lightning arrester is installed at the top of the protected object and connected with the specification wire and the underground leakage net buried in the ground. Lightning rod specifications must comply with the GB standard, each lightning protection category required lightning rod height specifications are different.
When the thunder discharge close to the ground when it makes the ground electric field distortion. At the top of the lightning rod, the formation of local electric field concentration space, to influence the development direction of the lightning discharge, leading to the lightning arrester, the grounding wire and a grounding device of the lightning current into the earth, so that the protected object against lightning.
Outdoor is not required lightning rod, indoor need lightning rod.Outdoor equipment needs certain lightning protection measures, but there are also many sealing and safety protection devices, so it is difficult to directly accept the lightning impact. If the light is used lightning rod, it can not achieve the desired result. Therefore, the lightning arrester is installed around the mine to meet the lightning protection requirements
So, in the power distribution unit is not set in the standard requirements of lightning, lightning protection box transformer belonging to the power station. The box of all metal welded or connected with the outside, Hanbian iron edge, bottom bearing metal and edge pieces directly with the main grounding connection or welding, box and box made of insulation equipment design the main grounding equipment, another cable to the main grounding grid. The equipment can achieve the purpose of lightning, without lightning.
