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What is the measured Voltage between L1 and Earth on 3 phase system?
Wiki User
∙ 14y ago
Wouldn't this depend on the voltage of the system? Like if it is a 460 or 208v system it would be 208 or 460v. There should be 3 lines L1 L2 and L3 all measure the input voltage. The wye or star point voltage on a three phase system is the square root of three. This number (1.73) is divided into the three phase voltage to get the voltage to neutral (ground). 208/1.73 = 120 volts, 415/1.73 = 240 volts, 480/1.73 = 277 volts, 600/1.73 = 347 volts.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoFirst of all, there is no such thing as 'phase to earth'; the correct term is 'line to earth'. This can be done by connecting a voltmeter between the line conductor and an earthed exposed metal part.
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What is the difference between insulation resistance and earth resistance?
insulation resistance can be measured by means of megger, with built in d.c generator. It is measured between the conductor and the earth. earth resistance can be measured by means of earth resistance tester. For good effective earthing, th earth resistance should be of order 0.5 ohm
Voltage across Neutral and earth for a 3 phase auto transformer?
A grounded neutral will be at earth potential. A floating neutral will be at a voltage dependent upon the voltage imbalance between phases, and the design of the transformer.
What is voltage between earth and line?
In a typical residential situation there is 220 to 240 volts between the two hot wires that are typically red and black and 110 to 120 volts between neutral and either black or red. The voltage between neutral and earth should be zero.
What is voltage potential betweei positive to earth?
By saying 'positive', you appear to be describing a d.c. system. In which case it depends entirely on the potential difference of the source and how it is earthed. If you are describing an a.c. system, then you presumably mean 'line', rather than 'positive', then -again- it depends on the potential difference of the source and how it is earthed -e.g. in the UK, the potential of the line, measured with respect to earth, should be close to the nominal value of 230 V.Incidentally, there is no such thing as 'voltage potential'. 'Voltage' is synonymous with 'potential difference', not'potential'. So, when you say 'voltage potential', it's the same as saying 'potential difference potential' which, I think you will agree, doesn't make any sense!
Is voltage the same as potential?
volt drop and potential difference are effectively the same thing, although the term volt drop is usually used in reference of what voltage has to occur for a diode to conduct, or what volt drop is expected across a long wire etc, potential difference is used to refer to the difference in voltage over a potential divider.
What are the distance the solar system is measured by?
Interplanetary distances are measured in either kilometers or in miles. For the distant planets, some measures are measured in Astronomical Units, where one AU is the distance between the Sun and the Earth. So, 1 AU = 93,000,000 miles.
How speed of rotation of earth depends on distance between earth and sun?
No dependency, when measured on Earth.
What is the difference between the speed of light as measured on Earth and as measured on the International space station?
there is none.
What is the difference between earth resistance and insulation resistance?
insulation resistance can be measured by means of megger, with built in d.c generator. It is measured between the conductor and the earth. earth resistance can be measured by means of earth resistance tester. For good effective earthing, th earth resistance should be of order 0.5 ohm
What is the difference between insulation resistance and earth resistance?
insulation resistance can be measured by means of megger, with built in d.c generator. It is measured between the conductor and the earth. earth resistance can be measured by means of earth resistance tester. For good effective earthing, th earth resistance should be of order 0.5 ohm
How many voltage between phase and earth?
Depends on country.
What can be measured in kilometres?
Distance is measured in kilometres, such as the distance between two towns, or the distance from the Earth to the Moon.
What is the 11kv phase to earth voltage?
6350.8 volts AC rms. The phase to earth voltage is ( square root(3) ) x lower than the phase-phase voltage on a 3 phase system.
Why need neutral eathing in transformer and generator?
In the case of a step-down transformer, the secondary winding is earthed (grounded) to provide protection against an insulation breakdown between the high voltage and low voltage windings -in other words to deliberately cause an earth fault that will initiate the operation of the high-voltage system's protection system. At the same time, it provides a zero-potential point of reference for all potentials measured on the low-voltage system, and a means by which earth-fault currents can return to the source. In the case of a three-phase transformer supplying an unbalanced load, an unearthed star-point will result in a 'floating neutral', which means that the three phase voltages will likely be unbalanced (i.e. different from each other).
Name and explain the unit used to mesure distance in space?
Distances between earth-orbiting objects, and between those objects and the earth's surface,out to the natural moon: measured in miles or kilometers.Distances between major objects in the solar system, sun, planets, comets etc.:measured in miles, kilometers, and Astronomical Units (AU). The AU is the averagedistance between the earth and sun, roughly 93 million miles.Distances between the solar system and anything outside of it: measured in light-years.The LY is the distance light travels through space in one year, equal to about 63,200 AU,or 5.8787 x 1012 miles.
What is the volts per phase on a 480 3 phase system?
The (ideal) voltage is 480V line to line. The line to neutral voltage (if it is a grounded system - 4 wires) is 480 / 1.732 = 277 volts. The actual measured voltage may be slightly higher or lower than this.
Voltage across Neutral and earth for a 3 phase auto transformer?
A grounded neutral will be at earth potential. A floating neutral will be at a voltage dependent upon the voltage imbalance between phases, and the design of the transformer.
