Is It Necessary To Install A Surge Protector In The Distribution Box?

I believe that before readers read this article, they have some understanding of what a surge protector is and its principle and function. However, readers may have some questions about the installation requirements of surge protective device in lightning protection design. Do all distribution boxes and distribution cabinets have to be equipped with surge protectors? Can I install fewer surge protectors to save costs? Today, the editor will talk to you about the requirements for installing surge protectors in distribution boxes based on this issue.

Before talking about the specific content and related requirements, the editor will first answer this question of readers. As long as there is a wired electrical box connected from the outside, it needs to be connected to a surge protection device, so the distribution box must be equipped with a surge protector.

Is it necessary to install a surge protector in the distribution box and distribution cabinet? Distribution boxes are generally divided into power distribution boxes, lighting distribution boxes and metering boxes, which are the last-level equipment in the distribution system. The distribution box usually includes switchgear, measuring instruments, protective electrical appliances and auxiliary equipment. During normal operation, the circuit can be connected or disconnected by manual or automatic switches. In the event of a fault or other situation, the protective electrical appliance can be used to disconnect the equipment. The measuring instrument can measure and adjust various parameters and send signals for abnormal information.

Is it necessary to install a surge protector in the distribution box? Usually, different distribution boxes are in different lightning protection zones in the entire project. According to the requirements of national standards such as GB50057 and GB50343, different levels of surge protectors must be installed, otherwise the intrusion of lightning surges may cause damage to the distribution box and subsequent lines. According to the requirements of GB51348, not only a surge protector should be installed in the distribution box, but also a backup protector should be installed in front of the surge protector.