In an 3 phase UPS DISTRIBUTION INITIALLY THE NEUTRAL TO GROUND VOLTAGE WAS LESS THAN 2 VOLTS. aS THE LOADS GOT
479528
As the loads increased the line to neutral imbalance of each phase caused the neutral to ground voltage to increase.\n\nThe load of each line to line or line to neutral imbalance causes current in each phase to be imbalanced.
702226
Its fault with the socket or the wiring. Check them out. You have not mentioned the voltage. Wattage matter in performance. Its only the Voltage & Ampere that matters for working.
1085514
The max sytem load for 3 phase 208v Y 30kva 100% 89 Amps, so buy a 100 amp this will give you  an upgrade if ever needed and be safe.
1007376
The voltage of 3 phase is the phase to phase voltage.  If you have a wye connection, the phase to neutral voltage is the phase to phase voltage divided by the square root of 3.  For 220 V would have phase to neutral of 127V.  You said earth.  There is no relationship to the earth unless you connect part of the transformer to earth.  If the secondary has a neutral which is connected to earth, then it would be 127V.
1114398
d: Subjected to a small voltage.
391098
i am assuming you are trying to minimize losses in a utility distribution system...when i was a system engineer at a utility..the quickest payback items were 1)correcting power factor as close to unity as possible with switched capacitor banks 2)have a policy of sizing distribution transfomers properly in relation to the load (i.e not oversized) to miminimize NL (no load) losses and not undersized too much either to minimize LL (load losses).\n3)size distribution feeder conductors to miminize both NL and LL losses.  The correct point at which you achieve max savings has a good bit to do with your %rate of capital as well as your cost of power both KW and KWH rates.
1040867
Using 3 phase current, it is possible to get 3 times the energy down the same wire - so it is much more efficient.  Each phase is 120 degrees out from the others, so the signal looks kind of like braided hair, when one phase is at the peak, the other two are crossing at 70%, one going up the other going down.  Once we get the energy to where we want to use it, then we can tap off the different phases for single phase use. \n\nI forget about the delta and wye stuff, it's been a while. \n\nCheers!
734859
Divide by the voltage and multiply by 1000.\n\nIf you are working with 3 phase power, divide again by sqrt(3)
357873
Fault Currents are calculated based on the impedance of the system. Therefore, by adding line inducatance or even just lengths of wire, the Fault Current can be reduced.\n\nFor a typical 2000KVA, 480VAC 3 phase system a fault current can be more than 350,000amps in less than a second.\n\nCheck out the following: on the 'eatonelectrical' link type in Fault Current for calculations
269821
Depending on the (source + cable) impedance, approx .01 ohms and figuring that this is a 3phase line then:\n\nFault Current is approx 365,000 amps in less than a second.\n\nCheck out the following; Type in Fault Current in search.
868551
Well, you see, that isn't done.  When you need single phase power, you use only one phase of the supply circuit.  Each of the phases of the 480 volt 3 phase power will be run through a separate transformer to step the supply down into 3 phases at 120 volt.  Typically, a house is served by two of those three phases.  You use two phases with two hot wires and a neutral to get 240 volt power for your oven, range, dryer and water heater.  The other circuits in the house are served by one phase or the other at 120 volts with one hot wire and a neutral wire.
270713
The power supply might have gone out.
572836
Three phase power is delivered perhaps to a machine shop with large electric motors.  The motors and transformers (if needed) are often connected in "Y" or "Delta" configurations using all three phases.  The machine shop may also use single phase (for light bulbs?) and two phase (for heaters?).  A single phase to ground provides 110 volts.  Two phase connected together provide 220 volts.  When all three phases are connected 440 volts is provided.  You can often see all three phases up on most power poles and only two phases are connected to most homes (for 110 and 220 volt service).\n\nConsider the analogy between the flow of electric current and the flow of water.  Voltage is like water pressure and current (amps) is like flow rate (gpm).  The three phases represent three different "pipes" between the generator plant and the customer.  Each phase is like a piston pump at the generator that shoves a pulse of water (amps) to the customer then sucks it back (alternating current).  The three phases are connected to the same shaft (like pistons in a three cylinder car) but are evenly spaced (360 degrees/3 = 120 degrees out of phase).  The electrons shoved into the pipe at the generator need not reach the customer before being sucked back.  A like quantity of electrons are pushed into the ground at the customer's installation (communicated at the speed of light!) then pulled back out of the "ground" for reuse.\n\nObviously the power that can be transmitted to the customer depends on whether he/she is using single, two or three phases where P = EI (Power = Voltage x Current).  Hope that helps a little.
431144
The only reason you get shocked when you touch one phase and ground in the commercial power distribution system is because the commercial power distribution system uses a grounded system where the earth itself is used instead of a wire.  Commercial power distribution I believe (and I may be wrong on this) uses Wye (pronounced "Y") connected three phase power with the center grounded allowing the earth itself to be used in place of the fourth wire.  In a balanced 3-phase system (all loads draw the same amount of power from all three phases) the center is not required, but few people have three phase blenders, so only a single phase of the power is sent to an outlet along with the neutral which is grounded.  If you look at Naval electrical distribution systems, they are ungrounded.  Navy schools teach that the use of an ungrounded system raises reliability because two faults to ground on two different phases are required to disable the electrical distribution system, and that in ideal conditions one can touch a single phase and ground and not be shocked.  Berkeley challenges this and I have included a link to their web sight.  I believe the truth is somewhere in the middle because I have touched a single phase and ground and been shocked.  It was a 440V wire, and I definitely felt it, but it was not nearly as sever as being shocked by an outlet (115V) so ungrounded reduced the severity, but did not eliminate the shock.  The electricity that I felt was probably from capacitance in the insulation.  To any one who cares, I managed to shock myself while removing a dead front fuse.  Dead front fuses are "idiot proof", but you know what happens every time they make something that is "idiot proof"?  They make a better idiot to go with it.  (:
495292
Sounds like you might have a static charge problem.  Do you have something you could use as a grounding strip?
917152
I believe that would be how the power gets to your motherboard.  Green is ground, and black it the juice connection.
1159259
Your problem is the Hard Disk. It could be your connectors & bad contacts. Electronic problem mostly. I don't understand how you connect the same system at 2 places. Do you carry your system wherever you go?\n\nIf that is the case then you should get yout power sources checked for proper earthing. Last resort........change your HDD. Use the current as a backup drive so your data isn't lost.\n\nGood luck.