
Surge Protection Devices
Installation of lightning current arresters upstream of the meter is subject to co-ordination with the relevant power supply company. Installation of an r.m.s.ective protection cascade (SPD classes B, C, D) requires co-ordinated application of the respective protective devices.This is ensured by a defined line length between protective devices. When using lightning current arresters of type SPI in connection with surge arresters SPC with a maximum continuous operating voltage Uc of 460V AC, no specific line length or decoupling coils are required.