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Series vs. Shunt Mode Methods
of Surge Suppression
Wave Forms "Polygraph Test"
Each of these well-known "surge suppressors" were zapped with a 1,200
volt, 600 amp surge and the suppression performance was measured.
Top trace is the hot wire and the bottom trace is the ground wire.
The traces of the MOV suppressors show damaging let-through voltage is clearly
evident on the hot line as is the contaminated ground from the diverted surge.
Compare with the Zero Surge trace and note there is barely a rise on the hot
and nothing on the ground. Which one would you plug your expensive electronic
equipment into?