goshenelectric

The SPD12Z (VH40TA385M) mainly functions to protect against lightning and overvoltage.

Two-level SPD12Z  are used in electric power system to protect the internal circuits of rectifiers against damage due to inductive lightning and overvoltage over AC input, so as to improve the reliability of the system.

As the system is required of high reliability in important application occasions such as big power plant and heavy substations, most small substations and user substations are located in suburbs or mountainous areas, which are more inclined to lightning, and power grids quality problems may exist in some user substations that overvoltage is more likely to occur in such substations, the SPDs can be used to protect the system against the fault and improve the reliability of the system.

Level C and level D surge protection devices are provided. See the following table for their specifications.

Level C VH40TA385M
Max. anti-lightning surge current	40KA(waveform of lightning 8/20µS)
Rated anti-lightning surge current	20KA(waveform of lightning 8/20µS)
Level D SPD12Z
Max. anti-lightning surge current	20KA(waveform of lightning 8/20µS)
Rated anti-lightning surge current	10KA(waveform of lightning 8/20µS)