Need information on a three phase transformer angular displacement 180 degree. Any information would help.?
441811
http://www.masterygroupsouth.com/tbphs.htm\n\nTry this website.
92400
Usually a delt system is compared with a "Y" (wye) system.  A delta is a Greek letter often represented as a three-sided triangle and a Y is a letter with three members (two arms and one leg).  The important feature is threeness.\n\nElectrical power is supplied in three phases (single-phase, two-phase and three-phase) involving voltages of 110, 220 and 440 Volts, respectively.  Single phase is used for light bulbs, two-phase is used for heaters (such as clothes dryers and kitchen ranges) and three phase is used for very large motors.  Alternating current (AC) forms a sinusoid and in three-phase current the sinusoids are out of phase (reaching peak voltages at different times (but 60 times per second each) and this delivers high voltage and maximum power.\n\nThere are two common methods of winding transformers and motors to take advantage of three-phase current and these are referred to as "delta windings" and "Y-windings."  For purposes of circuit analysis they are equivalent.
148738
Homework, huh?  Badly copied from the source.  Make it an answerable question, clean up the gibberish and try again.  For instance, 90 degrees phase lag at what frequency?  Sorry to be curmudgeonly, but this shouldn't be just about getting answers without understanding.  Anyway, here's a hint.  At 90 degrees, Xr=Xc, and RC=1/(2*pi*f).  For phase lag the R is in series and the C in shunt.
664737
Hehe, the utility company inspector will be pretty mad at you the next time he comes around.  I assume from your description that a 220->9V transformer is installed before the meter, but then a 9->220V transformer is placed after the meter to get the voltage back up to normal for your home.  Is this right?\n\nThe step-down transformer will not slow down your meter (there is no free lunch in power consumption).  What will happen is that at the 9V side of the transformer, you will have about 24.5 times the amount of current under the normal setup.\n\nMost meters have coils that sense the voltage and current and mechanically sum up the power.  So, you would be dropping the voltage but raising the current in the same proportion (the power readings will be close to the same as if you left things alone).\n\nPractically, the meter might be damaged since it was probably not designed to handle the higher current and lower voltage.  Also if the transformers you install are not rated correctly, bad things will happen.  The transformers you will need will likely cost a whole lot.  Finally, your meter might actually speed up a little since the transformer after the meter will certainly have some power losses associated with it.\n\nTo sum it up: not a good idea.
724992
I love your suggestion. I often find poorly explained areas in equipment manuals. What's the question though?
437532
Possibly Rectangular Series Transformer (RST).  See Page 7 of the link.
504290
The RMS (root-mean-square) value of AC voltage is NOT dependant on the frequency.  For a sine wave, it is .707 (half the square root of 2) multiplied by the peak voltage.\n\n120 and 240 volt circuits common in the US are derived from the center-tapped transformer, the center called the neutral.  This gives you 120V between each phase and neutral, and 240V between the phases.  An analogy that might make more sense is with batteries.  You can put two 9V batteries in series to get 18V, but you still have 9V across each battery.\n\nI think what you want to know from your question, is why do we have both 120V and 240V.  You can argue 120V is safer than 240V, but it is more historical that 110-120V is used in the US (many other countries, but not all, use 220-240V).  The reason for having 240V for some equipment is with a higher voltage it will draw less current, so smaller wires can be used.  Similar to power transmission using high voltages.\n\nThe safety ground, the 3rd round pin on a normal plug, is connected to the neutral at the electrical service.  The neutral is grounded (to the earth), and so is the safety ground, but that connection to the earth has nothing to do with its purpose.  This safety ground connects metal parts of equipment to the neutral, so if a fault in the equipment causes voltage on those metal parts, it will trip the circuit breaker rather than give you a shock (if you were touching it WHEN the fault occurred, you could get a shock before the circuit breaker tripped).  Another thing about the safety ground, it never carries current under normal conditions, and for that to be true it can only be connected to the neutral at the service.  NEVER connect a safety ground to a neutral at another point.\n\nAlso, never take the cover off your circuit breaker or fuse panel if you don't know what you are doing.  Suggesting someone take off the cover and poke around with a fluke is a bad idea.
888989
230v is measured between phase and neutral therefore L1 (R) N, L2 (Y) N and L3 (B) N.\n\nNote a star connection is Y. In your house you use 230v-240v single phase, i.e phase and neutral. Phase to phase 240√3 = 415v.
700927
The best publication and industry engineering guide is \n"The J&P Transformer Book" available through most on line bookstores. It is pricy by is the best text book on transformers\nSource: Electrical Engineer (ret) with 45+ yrs experience
97803
omg this 1 toootally got me!!\n\nhttp://www.liquidgeneration.com/content/a55hat.aspx?cid=316\n\njust scroll down n click "begin" ....boo!!
756481
Normally this is a "Restive" not voltage question/answer, and the proper neutral to ground = 2 Megg ohms (min.) this being incorporated in a residential application.\nHigher voltage in let us say a 3-phase utilization this # is on the low side. (assuming a.c. source. d.c. is a completely different animal!
946535
The standard for voltage drop in a circuit is 2%.  Remember that the current must go back to the source so if you are running 3 Phase you must multiply 750ft by 1.732 to get the proper length.\n  So, using ohms law -voltage drop=current (in amps) X resistance (in ohms).  #000 gage copper wire has .00073 ohms/ ft.  Using 200 amps in this formula, If you work out the math you will find that a 30 amp service is about all you can safely install at that distance.  Even at 30 amps you are running the risk of over heating and shortening the life of your equipment. \nexample:  750ft X 1.732 X .00073 ohms per ft = .9 ohms total\n\nSo:  .9 ohms X 30 amps = 27 volts dropped\n\nThus:  if your service is 240 volts your voltage drop will be a little over 10 % or 213 volts at the point of use..  Some equipment may endure this.  I would not chance it.
216731
480 VAC is produced as a 3 phase power source. Widely used here in the USA for industrial applications.\n\nThis voltage is not typically considered single phase, it is Line - Line. The 480VAC is transformed into 120VAC/220VAC for typical control circuits after it enters a control cabinet. The control Xfmr uses 480VAC line-line on its input.\n\nThis voltage to earth ground is not 480VAC, it is 480V/sqrt(3) = 277VAC.\n\nCheck out the 3 Phase power distribution below:
660156
http://www.physlink.com/education/askexperts/ae25.cfm
1164919
you need to describe what you mean by "small" better.\nis it too small vertically, horizontally, or both?\nAlso, how good is your electronics background?\nDo you know how to discharge the CRT and large capacitors so you don't get zapped with 330 to 10,000 volts while attempting to repair it?\nYou also need to define "wavy" better.\nWith the tin amount of information you have given though, it sounds like the power supply is failing, but in which part is impossible to say.
755807
In order to know how 3-phases of voltage (separated by 120 degrees) are produced, one would have to know how a 3-phase generator works and know a bit about electromagnetic theory.\n\nIn nearly all power plants (except for some wind turbines), a 3-phase synchronous generator is used.  This type of generator has one or more wire coils attached to the shaft (the rotor) and a set of coils evenly spaced around the frame surrounding the shaft (this area is known as the stator).\n\nThe coils on the rotor are energized by a small DC source and become constant electromagnets with north/south poles determined by the direction in which the current flows.  The shaft is moved by a source of mechanical power.  Generally a steam turbine is used where the steam is heated from some source of energy like coal, natural gas, nuclear etc.\n\nSo as you can imagine, we have one or more electrogmagnets attached to a shaft being rotated by a turbine.  Remember that these rotating electromagnets are inside the evenly spaced windings on the stator.  Faraday's law states that a time-changing magnetic flux in a coil will produce a voltage in that coil.  Since the rotor electromagnets are constantly changing position relative to the stator coils, the magnetic flux seen by the stator coils is also constantly changing.  The wire coils on the stator frame are evenly spaced such that the induced voltage waveforms will be spaced 120 degrees apart.\n\nSo, we then have sinusoidal voltage waveforms produced on the stator coils such that they are 120 degrees apart.  These coils on the stator are then connected in either wye or delta configurations and carefully hooked up to the power grid.\n\nSo that is a somewhat simplified view of what is happening.  There are various other complications that I have not mentioned, but are not important in getting the general idea.  You might be able to find a nice 3-phase electric generator animation on howstuffworks.com or Wikipedia.
851608
WYE connections reference the line values of current and voltage to a "hard-wired" neutral. This means  \n (line voltage) = 1.732 * (phase voltage)\n (line current) = (phase current)\nThis is a much easier system to use when manufacturing an electric machine ... there will be a "neutral" - complete with leads - that can be used when troubleshooting.\n\nDELTA connections reference the line values of current and voltage to a "theoretical" neutral. This means \n (phase voltage) = (line voltage)\n (phase current) = (line current) / 1.732\nBecause of the "theoretical" nature of the neutral connection, the winding can experience far harsher effects from harmonics than the standard WYE version. Thus it isn't used as often in large machines ... although it's fairly common in smaller (<100 HP) designs.\n\nAny 3-phase machine can be used in either format; in fact, most multi-speed windings employ one of each.\n\nThe simplest advantage may come when looking at transformers, though. With a WYE-DELTA transformer, there is no possibility of ground faults between the input and output sides (unless, of course, a major accident happens!). IT also has an immediate 1.732 ratio in terms of voltage/current ... even if the turn count is the same on both sides.