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What is the voltage value phase to phase at 180 degrees apart?
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∙ 13y ago
Single phase voltages vary throughout the world. To answer this question a basic voltage or country voltage has to be stated.
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∙ 13y ago
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Why the voltage drop across inductance and voltage drop across capacitance is greater than source voltage in series resonance circuit?
The reason for the total voltage drops across the capacitance and inductance IN AN AC CIRCUIT has to do with the different phase angles of the voltages.First, current is the same value and same phase angle everywhere in a series circuit. But, voltage across a capacitor lags current by 90 degrees (capacitor current leads voltage). Next, voltage across a pure inductance leads current by 90 degrees (inductor current lags voltage).The rule that all voltages in a series circuit have to add to the supply voltage still applies, but in this case, the voltage drops are added VECTORALLY, not arithmetically. If you were to graph this addition, you would show any resistance voltage in phase with the current, the capacitor voltage at -90 degrees to the current and the inductor voltage at +90 degrees to the current, for a phase difference between them of 180 degrees, cancelling each other out.In a series resonant circuit, the impedances of the capacitor and inductor cancel each other. The only impedance to the flow of current is any resistance in the circuit. Since real-life inductors always have some resistance, at least there is always some resistance in a series resonant circuit.
Why use 1.732 for phase voltage in electrical thechnology?
Line voltage is stated as "phase to phase". Phase voltage is stated as "phase to ground".In a three phase system, each phase is 120 degrees out of phase with respect to the other two, one leading, and the other trailing.Draw the vector diagram for this and you get three triangles inside a larger triangle, the outer sides being phase to phase and the inner sides being phase to ground. The outer triangle is equilateral, with angles of 60 degrees, and the inner triangles are isosceles with angles at the outer triangle's vertices of 30 degrees.Look at one of the inner triangles and bisect it with a vector from ground perpendicular to the vector for phase to phase. You see a right triangle. Now you can do trigonometry...The base is one half the phase to phase voltage. Lets call that X. In trig, cosine(theta) = X (one half phase to phase) over hypotenuse (phase to ground). Cosine 30 is 0.866, so phase to ground is one half phase to phase over 0.866, or phase to phase over 1.732.A typical US distribution system has a three phase power at 13.2kv, phase to phase. We make that, simply, 13.2. If you measure phase to ground while the system is in relatively good balance, which it is most of the time, you get 7.62kv. We call that 7620. This is in the ratio of 1.732.Addition: It's also just the square root of 3.Comment">CommentThe three 'hot' conductors that supply a three-phase load are called 'line conductors', which is why the voltage between any pair is called a 'line voltage'. There is simply no such thing as a 'phase-to-phase voltage' or a 'phase-to-ground' voltage!In a three-phase, four-wire, system, a 'phase voltage' is measured between any line conductor and the neutral conductor. In this case, the line voltage is 1.732 times the phase voltage.In a three-phase, three-wire, system, a 'phase voltage' is measured between any pair of line conductors (there is no neutral conductor), because it is numerically-equal to the line voltage.
What is called an effective voltage in Alternating current and if you mention 115 V ac 3 phase means peak voltage is 115 or it is an effective voltage?
115 is the RMS voltage. The actual voltage is a sine wave from -167 to +167 relative to ground. RMS stands for root-mean-square, and it a way of saying that 155 Volts of DC would do the same work on the same sized load. There can be up to 3 phases, and they are the sine wave, shifted by a part of the curve. In most houses, there are 2 phases, and the voltage to ground for each is 110 to 120 V RMS. The voltage between the 2 is 230-240VRMS. 3 phase gets very complex. Each phase is 115 to ground or neutral. 3 PHASE 115V AC EACH PHASE IS 120 DEGRES PHASE SHIFTED THE EFFECTIVE VALUE IS .639 X 115 THE PEAK VALUE OF PHASE IS 1.41X RMS VALUE.
What is the kv phase to phase for 13.8kv?
There is no such thing as a 'phase-to-phase' voltage; the correct term is 'line-to-line' voltage. Whenever you mention a value of voltage for a three phase system, it is considered to be a line-to-line voltage unless it is stated clearly that this is phase voltage (line to neutral) voltage.(The reason that there is no such thing as a 'phase-to-phase' voltage is because phases exist between, or 'across', line conductors or between a line conductor and a neutral.) That is a world wide practice for electrical power engineers.
What is the power factor in pure inductors explain?
The power factor (cosine of phase angle) of pure inductor is zero because the phase angle between current and voltage is 90 degrees .If the value is substituted in the formula It will be zero.
What is peak voltage value of 3 phase?
The same as in single phase with the same RMS voltage.
Does kva equal voltage x current x 1.73 for a 3 phase generator?
Yes, but only for balanced loads (current in all three phases the same value). The voltage value used is the phase to phase voltage.
What is the value of 3 phase voltage in India?
In India its 415V, 50Hz.
In a 3 phase full converter the output voltage during overlap is equal to?
Average value of the conducting phase voltages
How much voltage in phase to phase?
First of all, the correct term is 'line to line', not'phase to phase'. The line to line voltage is called a line voltage, and its value depends on the electrical standards in your country, and the point in the electrical tranmission/distribution system where it is measured. In the UK, for example, its value could be between 400 kV (high-voltage transmission line) and 400 V (low-voltage distribution line).
Why the voltage drop across inductance and voltage drop across capacitance is greater than source voltage in series resonance circuit?
The reason for the total voltage drops across the capacitance and inductance IN AN AC CIRCUIT has to do with the different phase angles of the voltages.First, current is the same value and same phase angle everywhere in a series circuit. But, voltage across a capacitor lags current by 90 degrees (capacitor current leads voltage). Next, voltage across a pure inductance leads current by 90 degrees (inductor current lags voltage).The rule that all voltages in a series circuit have to add to the supply voltage still applies, but in this case, the voltage drops are added VECTORALLY, not arithmetically. If you were to graph this addition, you would show any resistance voltage in phase with the current, the capacitor voltage at -90 degrees to the current and the inductor voltage at +90 degrees to the current, for a phase difference between them of 180 degrees, cancelling each other out.In a series resonant circuit, the impedances of the capacitor and inductor cancel each other. The only impedance to the flow of current is any resistance in the circuit. Since real-life inductors always have some resistance, at least there is always some resistance in a series resonant circuit.
Why use 1.732 for phase voltage in electrical thechnology?
Line voltage is stated as "phase to phase". Phase voltage is stated as "phase to ground".In a three phase system, each phase is 120 degrees out of phase with respect to the other two, one leading, and the other trailing.Draw the vector diagram for this and you get three triangles inside a larger triangle, the outer sides being phase to phase and the inner sides being phase to ground. The outer triangle is equilateral, with angles of 60 degrees, and the inner triangles are isosceles with angles at the outer triangle's vertices of 30 degrees.Look at one of the inner triangles and bisect it with a vector from ground perpendicular to the vector for phase to phase. You see a right triangle. Now you can do trigonometry...The base is one half the phase to phase voltage. Lets call that X. In trig, cosine(theta) = X (one half phase to phase) over hypotenuse (phase to ground). Cosine 30 is 0.866, so phase to ground is one half phase to phase over 0.866, or phase to phase over 1.732.A typical US distribution system has a three phase power at 13.2kv, phase to phase. We make that, simply, 13.2. If you measure phase to ground while the system is in relatively good balance, which it is most of the time, you get 7.62kv. We call that 7620. This is in the ratio of 1.732.Addition: It's also just the square root of 3.Comment">CommentThe three 'hot' conductors that supply a three-phase load are called 'line conductors', which is why the voltage between any pair is called a 'line voltage'. There is simply no such thing as a 'phase-to-phase voltage' or a 'phase-to-ground' voltage!In a three-phase, four-wire, system, a 'phase voltage' is measured between any line conductor and the neutral conductor. In this case, the line voltage is 1.732 times the phase voltage.In a three-phase, three-wire, system, a 'phase voltage' is measured between any pair of line conductors (there is no neutral conductor), because it is numerically-equal to the line voltage.
What is the relationship between phase and line voltage in a 3 phase generator?
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.
What is the phase value of a series circuit if EL leads the applied voltage by 90 degrees and EC lags the applied voltage by 90 degrees?
Assuming EL represents the voltage drop across the inductive component, EC represents the voltage drop across the capacitive component, then what has happened to ER as it too affects phase relationships?Furthermore, I assume that you mean that EL leads, and EC lags, the supply current, NOT the supply voltage!!!! Otherwise, your question is completely out the window!!!Without knowing the values of EL and EC andER, it is impossible to answer your question.Unless EL = ER, in which case the circuit is at resonance, and the line current is then in phase with the supply voltage.(Incidentally, we normally reserve the symbol 'E' for supply voltages, and use 'V' or 'U' for voltage drops.
Write dowen the relationshipbetween line and phase the 3phase system if voltageline and currentline are line value voltage power and current power are phase value?
A-for star connectionE(line)=1.73E(Phase)I(line)=I(Phase)&B-for delta connectionE(line)=E(Phase)I(line)=1.73I(Phase)
Distance maintain between phase to phase?
is there a minimum distance between 480 volt phases. ANOTHER ANSWERThere is no such thing as a 'phase-to-phase' voltage. The correct term is 'line-to-line', which is why that voltage is called a 'line voltage'. The distance between these line conductors depends on the value of the line voltage; the greater the line voltage, the greater this distance must be to prevent any flashover. These distances are specified in the utility company's standards or regulations.
What is called an effective voltage in Alternating current and if you mention 115 V ac 3 phase means peak voltage is 115 or it is an effective voltage?
115 is the RMS voltage. The actual voltage is a sine wave from -167 to +167 relative to ground. RMS stands for root-mean-square, and it a way of saying that 155 Volts of DC would do the same work on the same sized load. There can be up to 3 phases, and they are the sine wave, shifted by a part of the curve. In most houses, there are 2 phases, and the voltage to ground for each is 110 to 120 V RMS. The voltage between the 2 is 230-240VRMS. 3 phase gets very complex. Each phase is 115 to ground or neutral. 3 PHASE 115V AC EACH PHASE IS 120 DEGRES PHASE SHIFTED THE EFFECTIVE VALUE IS .639 X 115 THE PEAK VALUE OF PHASE IS 1.41X RMS VALUE.
