For example, from L-L or L-N they have multiple MOVs stacked in parallel, and they are trying to get them all to be equally stressed. However, anyone that knows electricity knows that this is impossible. Some of these paralleled MOVs in the cluster will see the full brunt and once you saturate the MOV it burns up. You might think, well it has redundancy and has the other MOVs to keep you going but what most don't realize is that as you lose MOVs the voltage thresholds of that device changes and how it responds in the circuit. Another reason why many people are having SPD failures is because conventional SPDs have trouble dissipating the heat from the MOVs and again putting the MOV into a 'thermal-run-away' causing them to burn up or even worse the individual fusing that is in series with the MOV vaporizes and becomes an open circuit taking the MOV out of the surge path all together leaving you vulnerable to whatever is trying to get in. SurgePure SPDs offer a different approach utilizing only one large MOV for each surge path; there is no guessing as to whether there has been some burnt up MOVs or not. SurgePure's unique 'Single-Element' is designed to take multiple surges and not have degradation to the MOV through SurgePure's unique 'Surge Cushion' technology. SurgePure's encapsulated MOVs ensure the thermal integrity of critical surface areas and maintains functional MOV integrity by special heat-sinking characteristics thus eliminating putting the MOV into a thermal-run-away. Unfortunately, most customers look for SPDs aſter they've been hit hard with a surge that has caused major disruption to their business. With the high cost of equipment loss and high cost of loss-of-production things add up quickly. It's time to be proactive as all facilities will have to address their power quality sooner than later in this new digital world that is before us. For more information please check out SurgePure's informative brochure at www.surgepure.com Douglas Piebiak ME - SurgePure Corporation CANADIAN AUTOMATION VOLUME 3, ISSUE 3 17http://www.surgepure.com