How To Select Surge Protector For Distribution Box On Roof Of Building

The rooftop distribution box of a building belongs to the LPZ0B zone in the lightning protection zone. So how to select the surge protector for the rooftop distribution box of the building? What model and parameters of the lightning arrester should be selected?

How to select the surge protective device for the rooftop distribution box of a building? Article 3 of Section 5.4.3 of the national standard GB 50343-2012: For the AC power supply line entering the building, at the junction of the LPZ0A or LPZ0B and LPZ1 zones such as the main distribution box of the line, a surge protection device of Class I test or a surge protector of Class II test should be installed

According to the national standard requirements, you can choose a Class 1 power supply lightning arrester or a Class 2 power supply lightning arrester, according to the lightning protection level of the building (ABCD level)