Detailed Surge Protective Device Description
Features:
a) BY3 type SPD is suitable for AC 50 / 60Hz, 220V electric power system and
used at the joint of the LPZ2 and LPZ3 zones
b) It protects the electric network shocked by the thunder or over voltage
c) This type belongs to Class 3 and the usage condition is that there must
be installed the Class 1 or Class 2 SPD, otherwise it will be damaged by
the over impulse current
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