Recent content by westom

Double conversion does not mean cleaner. Double conversion simply means a same inverter is constantly converting battery power to a dirty AC. Serious facilities do not use battery backup with a three year life expectancy. Typical battery backup in big, serious facilities has a life expectancy...

Promoted as a pure sine wave output is still 'dirty' power. Which was always ideal for (not destructive to) electronics. To get anything even approaching a low %THD means at least $200. For a UPS with a life expectancy of three years. To only avert loss of saved data during a blackout. More...

All electronics with a universal supply would suffer no damage from such events. Others that do not have that feature would only suffer damage to the front end of its power supply. All electronics will convert income AC power to well over 300 volts radio frequency spikes. Robust protection in...

You have accurately not wasted money on protectors at the HVAC units. Those do nothing since a low impedance connection to earth ground is missing. Most all protection is done when protectors at the generator make that low impedance connection to that nearby single point earth ground...

Amazing how many experts have no basic electrical knowledge. Post denials anyway -without even one relevant number. When bogus (and subjective) accusations do not work, then they demean. An extremist technique that is somehow proof of superiority. Then a least educated denier need not...

Apparently basic electrical concepts are too complex. I care enough about your emotions as to question your intellectual integrity. Use the ignore button. This topic is too much above your grade. That reddit post is a bibliography. Apparently a bibliography is also too difficult to understand.

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A surge is a current source. Current will go down a hot wire no matter what that impedance. Since no low impedance path to earth exists. A current source increases voltage, as necessary, to get to earth ground destructively via an appliance. Either that current has a lowest impedance...

Demonstrated is the superior protection already inside electronics without using any protector parts. Protection that can be compromised (bypasses) when using plug-in protectors. Put numbers to those power strips with five cent protector parts. IEEE defined a protection at the service...

You did not quote a relevant paragraph. You simply threw it all in my face with a "take this" attitude. Meanwhile, I keep demonstrating how you completely misunderstood ARRL articles and deny Tech Tip 8 - which are solutions proven over 100 years ago. If you really wanted to learn, then the...

The basic concepts of single point earth ground are demonstrated in Tech Tip 8. Considering the subjective nature of denials that do not even include always required numbers, then Tech Tip 8 is more that enough to contradict those denials. More basic concepts that have not been explained. In...

Go back and read the rest of what must exist. It has been posted repeatedly. Cut and pasted many times. You did not read it? Each earth ground is the layer of protection. Home's single point earth ground is what makes protection on ALL incoming wires effective. The 'secondary' protection...

Now learn what they were saying. Each structure must have its own single point earth ground. Any wire that enters that structure must first connect low impedance to that structure's single point earth ground. Ironic that I keep posting relevant numbers and professional sources. You have yet...

Bingo. All protection starts there. All facilities, that cannot have damage, ALWAYS do that. Does not matter what technology protector device is used. What always matters is how that electric current connects to (dissipates in) earth without being anywhere inside a building. Only then is...

MOV manufacturers are blunt about this. SPDs must not fail catastrophically. Acceptable failure is degradation. That means it remains functional. Its Vb (threshold voltage) varies 10%. Does not vary even 10% many decades later; even after many direct lightning strikes. When properly sized...