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bogue The two previous replies are correct, just not enought details. Also you did not give detailes. If you want current for a power supply, do not do rms or pf. Use instance PK*Time and RMS numbers (source / load at peak curent). Comment; the standerd for power supplies (PF)is...

start The FCC and power co have decited that cap loads are bad. In cap loads current peak leads voltage peak. In inductive loads current peak lags voltage peak. Forty years ago loads were resistive (0 pf) or inductive (-pf, or laging. With computers, audio, and so forth, loads have become...

axd38 mc5w Is your answer related to something, or did you get mixed up. Back to the original questiom. If axd38 has the wrong answer, the reason must be pointed out. If the only person that can do this is "his", the question still must be asked. The tables "numbers" not an issue, the...

thinker cuky2000 To me nominal means "the expected limited conditions for operation, as well as the expected results from other conditions". In this case the spec is 7.5% and was recived a 5.75% item. The point I was trying to make, Is if the operating conditions are the same then a better...

itsmoked Sorry in strict terms you are correct. The military lumps all types together. Than seperates them as conducted and radation. Fcc is the same? The point is for power (AC IN) by the time you get to the input mains, it "should" be just conduction, which makes it a form of voltage...

axd38 Sorry But it is not about an error in concept but about a personal decision. All the other answers did was give advice on some of the mabeys that should have been considerted. I should not have gone into the personal aspect but that is the best way to relate. again sorry

steven7 EMI stands for electromotive interference. There are 4 basic types defined 1) conductive "on a wire" 2) conductive susceptable "subject to on a wire" 3) radiated? "energy in the air" 4) radiated sus "subject to energy in the air." Each indepent item has its specs...

thinker Spec are done at a "nominal temperature,and connection resistance, as well as load current, input volts, ect". All must be understood, to make a good evaluation.

vtpower cuky2000 and all others. I think we are saying the same thing. Your application is different from mine, but the results are the same. Having limited background in AC power distrubition systems. I gave an example of what I know. I think what you are saying is different transformer...

axd38 mc5w any one else Your question is should you confront your sup. With being a small shop (60 people ) yes. I have been terminated and promoted for the same thing. Being eng mag, I try to make it easy to all to voice expresions. In the MILITARY business there is not much room for error...

vtpower cuky2000 jgrist davidbeach mc5w jghrist electricpete I think I got everyone. My background is in power supply design. If I do not know what is coming in, I have no chance of control over the output. Been there done that. Electricpete (first answer)is correct. Did not give a...

mc5w I can only repeat what was given at the time. Spoke to a person later, same same. The last GE book I have is 1950 and is a quick ref. In about 1972 I tried to get 3Phase "y" installed, at 2000A. Houston lighting and power would only install "delta". We had existing 2000amps 3 phase (to...

VTPOWER MANY COMMENTS no answers. Some gave you good ref. CVT stands for constant volage. In general it is a concept of resonance transformers. Basic form has three windings of: WINDING: 1) input (the line input) 2) resonance winding (a winding that...

axd38 To get a concept. In the US 60 years ago (about, no AC), I think 40% was the num for homes. Around 1965 to 1975 a decision was made (no more "Y"), after ac. Many things went into the decissions. Center tap the 220 delta to get 115. Rotation of the phases is easy at 2500, 3 wire...

Teebet As indicated in some of the above answers, "how much confusion do you want". If your noise is not line frequency, or a multiple of it than it must be a internal oscillation, "most are line fc, or very removed". EXAMPLE I have a less than 1 year old Dell, I get 30 db at best...

ka2vey Sorry for the late reply. Are you telling me the phase has nothing to do with accuracy. Than there is no problem (if phase or accuracy do not matter)(by definaction) Once upon a time looked for oil using a locked servo system. Have done U S Nav. design. I design, build and made...

leoliu Having first seen your question on relibility. I know why the question. Ref to UL etc. Discussion: 1) Insulation systems have a problem. they get old and ware out. When new they may withstand(for surges 10 times their rating , old may be at rating. 2)...

leoliu NEMA, UL, MIL T 28, CS, all have sections addressing transformers. These are all based on heat and insulation classes (materials). All assume both mech and elect mfg, will not degrade the insulation material, (all of the general design rules followed). Therefore they address the...

PowerfulStuff Sorry but I tried to make a point. Only good design and building in the real world matters, if the specs are good. Regardless of the specs. If one supplier choses to handle the wire as it should be, and another did not (too much tension, turns too sharp,kinks,etc), or the...

I FORGOT we built 250. 250*18*365*24=39.4 million hrs. with no failures. Than multiply that times 6 (different units). That means real mtbf past the life of the universe. Consder a consumer mfg. 100 million units 10 million fail year 1. Mtbf is not 10/100 years. I would be supprised if any...