Type 1 Lightning-current Arresters
Type 1 SPDs (Class I, lightning-current arresters) discharge partial direct lightning current, tested with the 10/350 µs impulse. They are mandatory at the service entrance of any building with an external lightning protection system or an overhead supply. LPES Type 1 arresters cover Iimp 12.5 to 50 kA per pole in 1P, 1+1, 3P and 3+1 configurations with remote signalling.

