The concept of three phase alternating electricity refers to the relational phase differential of three alternating current single phase sine waves, each displaced 120 degrees of phase angle from the other.
still the is a three wire DC transmission system.
usually DC transmission used for several resone but the most know one is when the transmission line is longer than 600 km
There is no such thing as 3 phase to a DC motor. DC is direct current and is totally different from AC. 3 phase only exists in AC or Alternating Current
There is no such thing as a DC 3-phase motor.AnswerOn the contrary, there IS such a thing as a three-phase d.c. motor, and they are widely-used, for example, for driving water pumps (e.g. for swimming pools) supplied from solar panels. The supply to the (Hall-effect) d.c. motor is via a solid-state control system, which supplies three sequential d.c. voltages to the motor's field windings, which results in a rotating magnetic field for driving the rotor.
If using L-L voltages, the three phase power = V*I*sqrt(3)If using L-N voltages, the single phase power = V*ITo convert single phase to three phase, multiply by 3.
One hamster vs. three hamsters.
In three-phase systems, we always consider individualline or phase currents, or individual line or phase voltages. In other words, we treat currents and voltages no differently from single-phase currents or voltages (i.e. we don't 'combine' them because they are three-phase quantities). So these quantities are expressed in r.m.s. values.
If you mean 'phases' and not 'lines', then the loss of a phase has no effect on the voltages provided. You will still obtain three voltages, displaced from each other by 120 degrees.
Single phase and three phase voltages are not related to the frequency at which the voltage is generated. The frequency at which voltages are generated is governed by the speed of rotation of the generating device.
No. DC does not have phase. In order to have phase, you have to have AC so that you can have two or more AC sources to measure the relative phase angles that they possess.
600 volts between any two wires. The phase has nothing to do with voltages, only current relationship.
Your question is not clear.There is no such thing as a 'resultant' three-phase voltage. There are three, separate, line voltages (i.e. voltages measured between line conductors) for a delta-connected supply, which are equal in magnitude to the corresponding phase voltages. For a balanced wye-connected system, there are three line-voltages (again, measured between line conductors) which are 1.732 larger than the three phase-voltages (measured between each line conductor and the neutral conductor). For an unearthed unbalanced three-phase wye-connected load (unusual, but possible), the figure of 1.732 doesn't apply; instead the relationship must be determined by vector addition.If your question means to ask how do you determine the line voltages of a wye-connected system, given a set of unbalanced phase voltages, then you must vectorially add the relevant phase voltages to determine the relevant line voltage, taking into account the sense, or direction, of each phase voltage.
Average value of the conducting phase voltages
A synchronous motor is a three phase motor, which uses a magnetic field created by permanent magnets or a DC electromagnet on the rotor (usually). The stator windings have 3 phase voltages applied, and coupled with the DC field, create a rotating magnetic field that drives the motor at synchronous speed.
For use in the U.S., the standard voltages are; 208, 230, or 460 nominal.
"2 phase" and "3 phase" are descriptions of AC supplies, which no DC generator can imitate, regardless of its power rating.
Voltages are converted by the use of a transformer. The two voltages 208 (North American) and 415 (UK, European) are not a standard transformer configuration. The transformer would have to be specially wound to achieve this transformation.
add the signal voltages by connecting them in series - to +
3 phase is 120 degrees out of phase to each other <<>> There are 120 electrical degrees separation between phases in a three phase system.
Most buildings with a 3 phase service feed are 277/480v. That's 277 phase to ground and 480 phase to phase. This is then transformed to 120/208v.Answer for European SystemsIn Europe, the nominal low-voltage three-phase distribution systems are 400 V line-to-line (i.e. line voltages) and 230 V line-to-neutral (i.e. phase voltages).
The current is based on the load amperage rating. This is true regardless of single or three phase or voltages.
NO! The voltages available in the 3-phase system are 480 (if you wire phase to phase) and 277 (if you wire phase to neutral) Don't try it!
There are two aspects to consider: 1. There are several different standard voltages and connections used by the power company in three phase service. 2. Depends if the voltage is measured phase-to-phase or phase-to-ground/neutral. The three phase-to-phase (A-B, B-C, C-A) voltages should be roughly equal. In typical service, they may be 208V or 240V. The phase-to-neutral voltages are sometimes intentionally different. For example, some 3-phase service has a "high leg" that is 208 volts with respect to ground (called a 3 phase high leg delta connection), while the other two legs are 120V with respect to ground, so that you can operate 120V, 240V and 3-phase loads from the same utility service. The important thing is you should always measure before connecting equipment. 208V will fry most 120V electronics.
The correct term is 'angular displacement'. If you construct a phasor diagram for this transformer, you will find that the resulting secondary line voltages are displaced by 30 degrees from the primary line voltages.
Three phase power uses 3 conductors (or sometimes 4) for the equivalent power of 3 circuits, that in single phase would require 6 conductors. This is possible because the voltages and current are 120 electrical degrees apart in time and so sum to zero. In addition, because of the timing of the phase voltages and currents a very simple (and therefore cheap) induction motor can be run on the 3 phase supply. Single phase induction motors are more complex, less efficient, larger and more expensive. For similar reasons 3 phase transformers are more cost-effective than single phase.
You can measure them delta (phase to phase) or star (phase to neutral). Delta voltage, in a balanced star system, is 1.732 (square root of 3) times the star voltage.By convention, when you state a three phase voltage, unless you say otherwise, voltage is the delta voltage.AnswerA three-phase, three-wire, system has three 'hot' (slang) conductors, termed 'line conductors' (not 'phase conductors' -although this term is widely, but incorrectly, used in the field). A three-phase, four-wire, system has three line conductors together with a 'neutral conductor'. Voltages measured between any pair of line conductors are called 'line voltages'; voltages measured between any line conductor and the neutral conductor are called 'phase voltages'.
The Voltage produced by the generator will be like 3 sets of your home's voltage (assuming we're looking at an outlet and not the 220V at the brkr box).Each phase (sinusoidal wave) will be separated by 120 degrees, so when the 1st phase starts the 2nd phase will start 1/20th of a second later. The 3rd phase then starts 1/40th of a second later, and the 1st phase starts again 1/60th of a second later which is the beginning of the second set of sin waves. This of course is based on the N. American Frequency of 60 hertz which is 60 cycles (waves) per second.AnswerFor a three-phase, three-wire, system the line voltages will be identical to the phase voltages.For a three-phase, four-wire, system the line voltages will be 1.732 times the value of the phase voltages.