Surge Protector and a UPS?

Author: Dave Norwood

Is it OK to plug a surge protector into a UPS?  We have had several clients ask this question.  The easy answer is, “No.”  The output of a UPS is usually a square wave and not a sine wave. Surge protector circuits are designed for a sine wave input creating a mismatch. Even in rare case that the surge protector is designed for a square wave, it’s best not to do it. Continue reading

208-Volt Power vs 110-Volt Power

Author: Dave Norwood

The United States is slowly seeing the benefits of 208-volt power over 110-volt.  I didn’t truly understand the benefits until I ran into a problem with a large 4-processor Intel server.  Turns out that this particular server with four power supplies, only needed two to run when fed 208-volt, but needed three power supplies when fed 110-volt.  This became a problem when the client had dual power busses (sources/feeds) and one bus lost power.  Continue reading