Unpluggable type 1 SPDs

Type 1 VARIO SPDs are to be installed at the electric service entrance of installations with high lightning exposure; their high discharge capacity can deflect lightning currents from direct lightning strikes if an installation is equipped with a lightning rod. These SPDs have passed class 1 tests based on a 10/350μs waveform with regards to the NF EN 61643-11 standard. When the SPD is sold in an enclosure, the choice of the disconnector is determined by the maximal current level.
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