Dear readers,
Most of us think that every electronic equipments can work well if we can supply power to it.
Hold on a second, is it true? Perhaps the answer is yes 20 years ago, where the power supply made from transformer. The size of the transformer depends on the current we need to supply the equipment. For 30 Amperes, then you will get a big an heavy transformer and with power factor of 75% or less.
Confuse ? I'll try to made it simple, The bigger "watt" we need for our equipment means the bigger wire we use to make transformer and the bigger and heavier iron core we use for transformer. It will make the machine more heavier, hot, and unfortunately, with the power factor 75%, it means that we can only use 75% of power that have been transformed for our machine. If we measure the machine will consume 1000 Watts, actually the machine only consume 750 Watts, where are the rest of consumed watts? It will transformed to heat on the iron core of transformer and in the wire.
That is the minus effects of conventional power supply. The plus side is, it can reduce surge (a sudden change in voltage that happens only in short period), because of magnetic coupling it used to transform electricity power to the value suitable for our machine, or, with other words, magnetic coupling will respons slowly to the voltage change that happened in short periods.
Nowadays, all the electronic industries using Switch Mode Power Supply. It use electronic switching technology to provide certain value of power to supply our machine. It has better power factor, less weight, cheap, large range of voltage variations that can handled and so on.
But one of the critical disadvantage is they are very very influenced with the quality of electricity we supplied. I know that from electricity company, they never shut the power down, this is not the quality that I mean.
Many factors can affect the quality of power in our workshop. Automatic start and stop of air conditioning machine, running drill machine, loosen connectivity in the wire, etc. This will add all kind of noise and irregular effects on the electricity we supplied to the machine.
All these effects many times can be handled by filter in the power supply circuitry, but remember, every electronics component have a certain maximum value and they also have degradation because of extreme conditions. It means that you can say your machine running well until someday, without any previous sign, your machine stop working and it has fatal damages. Imagine your kidney, it will continue to work until it's damage reach certain value then you will feel that's a problem with your kidney, and usually it's critical. It's almost the same with electronic components.
I found a good resources from reputable company that sold many electricity protection system all over the world, take a visit to http://www.apcc.com/power/power_event.cfm
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