The Watteredge Vacuum Contact Switch, equipped of the patented DC Vacuum Contact Module, provides a high current DC shorting switch which offers safety, reliability and long life. The switch provides superior performance in the harsh environments of electrolytic cell applications, particularly in chlor-alkali and metals refining processes. Overall maintenance and energy costs are significantly reduced when patented Watteredge Vacuum Contact Switches are substituted for conventional contact switches. Further savings result from the elimination of lost production time due to emergency shutdowns or reductions in cell current caused by partial or complete failure of conventional contact switches.