How To Wire A Surge Protector?
Surge protectors (SPDs) play a vital role in electrical systems, protecting equipment from voltage surges and overvoltages. Correct wiring is key to ensuring that surge protectors work effectively. Recently, a customer contacted us and said that he was not clear about how to wire a surge protector. To this end, this article will introduce the different wiring methods of AC, DC and signal surge protectors and the precautions to be taken during installation.
1. Installation of AC surge protectors
1. Installation of SPDs in single-phase systems
Single-phase surge protectors have 3 wiring ports (L, N, PE), which are connected to the live wire, neutral wire and ground wire of the single-phase system, as shown in the figure below, where SSD refers to a surge-specific backup protector.
2. Installation of SPD in three-phase system
Three-phase power system includes TT system, TN system and IT system. TN system includes TN-C system and TN-S system. The wiring methods of different systems are different. For TT system, TN-S system and IT system with neutral line, SPD with 5 wiring ports (L1, L2, L3, N, PE) should be installed. For TN-C system and IT system without neutral line, SPD with 4 wiring ports (L1, L2, L3, PEN or PE) should be installed.
