Meba lightning protection MBD4-40 (hereinafter called SPD) is suitably used in the IT, TT, TN-C, TN-S, TN-C-S and etc power supply system of AC 50/60Hz, rated voltage up to 380V, to protect from direct and indirect lightning impulse and other transient over voltage.SPD meets with GB18802.1/IEC61643-1 standard.
SPD as only one side of terminals, able to prevent from being electric touching, indoor fixedly mounted, limiting voltage. SPD has built-in disconnector, when SPD is invalid due to overheating or breakdown, the disconnector can automatically separate SPD from the network, meanwhile send an indication signal. The visible window show white color in normal service, if to be separated from network, it will show red color. Fast response time, low residual voltage.