Commercially Available, Cheap Spike
Busters only contains small MOVs between line to neutral and neutral
to earth. They neither have the required surge current handling capacity
nor complies to any national/international standards. They are only
used as power line extension boards in all cases.
Power Guard is a Surge Arrester of requirement class C as per IEC 61043 - 1
They Protect low voltage customer installations from voltage surges
of all kinds
