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Should there be voltage between ground and each hot of a three phase power system?
Wiki User
∙ 11y ago
There are two types of connections in three phase systems. One is a delta connection where there is no connection to ground, so you should not get any voltage to ground. This is classed as a three phase three wire system. In this type of system any one of the phase wires could become grounded and no one be the wiser. Code requires that grounding lights be added to a delta system to visually show what the phase condition is in relationship to ground. The other type of system is a wye or star point connection. This is classed as a three phase four wire system. In this type of connection the coil ends are all joined together and grounded. You would have voltage between the phases and a lower voltage to ground. The voltage to ground would be the phase voltage divided by 1.73.
Yes. If there is no voltage between a hot and a ground, either the hot isn't really a hot or the ground isn't really a ground.
AnswerThere is always a potential difference between a line conductor and ground, regardless of whether it is a three-wire system or a four-wire system. This is due to the capacitance between line and ground.
Wiki User
∙ 11y ago
Wiki User
∙ 8y agoThe line-to-neutral voltage ('phase voltage) is the line-to-line voltage ('line voltage') divided by the square root of three.
Thus in this case, it is about 120 V.
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How do you wire a 110 V DB board from a 220 V 3 phase transformer supply?
In a wye system the voltage between any two wires will always give the same amount of voltage on a three phase system. However, the voltage between any one of the phase conductors (X1, X2, X3) and the neutral (X0) will be less than the power conductors. For example, if the voltage between the power conductors of any two phases of a three wire system is 220v, then the voltage from any phase conductor to ground will be 110v. This is due to the square root of three phase power. In a wye system, the voltage between any two power conductors will always be 1.732 (which is the square root of 3) times the voltage between the neutral and any one of the power phase conductors. The phase-to-ground voltage can be found by dividing the phase-to-phase voltage by 1.732 answer from ground and any phase
What is the voltage to ground of 13800 volts line to line?
On a three phase system with a line to line voltage of 13800, a wye connection will give you a voltage of, 13800/1.73 = 7977 volts to ground.
What is the measured Voltage between L1 and Earth on 3 phase system?
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.
What is a line to line voltage?
In a 3 phase system, the voltage measured between any two phase is called line to line voltage.And the voltage measured between line to neutral is called phase to neutral (line to neutral) voltage.AnswerThere is no such thing as a 'phase-to-phase' or a 'phase-to-neutral' voltage. The correct terms are 'line-to-line' and 'line-to-neutral'.The voltage between any two line conductors is called a line voltage.In a three-phase, three-wire, system, the line voltage is numerically equal to the phase voltage.In a three-phase, four-wire, system, the voltage between any line conductor and the neutral conductor is called a phase voltage. The line voltage is 1.732 times larger than the phase voltage.
How do you check for ground on aircraft wiring?
if the aircraft is the standard aluminum airframe. any power ground should be less than 1 Ohm. A digital multimeter is best for the novice. for more serious applications a mega-ohm meter should be used. but be careful, most of this meters output more that 600 Volts.
Should there be power from common to ground in wall socket?
120 volt wall outlets. Their could me a small voltage between neutral and ground,up to around 1.5 volts. What you are measuring is the voltage drop on the system at that point in the system. You see the neutral and the ground are at the same level some where up stream (service panel). The neutral is under the same load as the phase conductor, and the neutral will drop voltage same as the phase. This is in fact the way I measure voltage drop, (neutral to ground.) However don't get fooled by high imped. meter, They have a way of ghosting a voltage. Or floating high, You get a reading but the voltage is really not their.
How do you wire a 110 V DB board from a 220 V 3 phase transformer supply?
In a wye system the voltage between any two wires will always give the same amount of voltage on a three phase system. However, the voltage between any one of the phase conductors (X1, X2, X3) and the neutral (X0) will be less than the power conductors. For example, if the voltage between the power conductors of any two phases of a three wire system is 220v, then the voltage from any phase conductor to ground will be 110v. This is due to the square root of three phase power. In a wye system, the voltage between any two power conductors will always be 1.732 (which is the square root of 3) times the voltage between the neutral and any one of the power phase conductors. The phase-to-ground voltage can be found by dividing the phase-to-phase voltage by 1.732 answer from ground and any phase
What is the voltage value between one leg of a 208 volt system and the ground wire?
Well if you are talking about phases, it would be half of 208V.
What is the voltage to ground of 13800 volts line to line?
On a three phase system with a line to line voltage of 13800, a wye connection will give you a voltage of, 13800/1.73 = 7977 volts to ground.
Should Low-Voltage develop a system to connect with TX Industries' Purchasing system Why or why not?
= "Should Low-Voltage develop a system to connect with TX Industries' Purchasing system Why or why not?" =
What is the voltage-to-ground on a 4160 V delta circuit?
There should be no voltage to ground on a delta system. That is the reason that these types of systems have to have a set of grounding lights to warn when the system inadvertently grounds. A delta system is a three wire connection, no neutral. A voltage to ground is only available on a three phase four wire (star or wye) connection system. The fourth wire being a neutral which is grounded thereby giving a voltage from each leg to neutral.
In a 480 Volt 3-phase power supply what is the voltage between each lead?
Assuming this is a WYE connected system: (Most commercial/industrial services are) Your question answered it: 480 volts. The phase to phase voltage on this system is 480 volts and the phase to ground voltage is 277 volts.AnswerThe 'leads' you refer to are more-properly called 'lines', and the voltage between any pair is called a 'line voltage' (not a 'phase voltage', as stated in the original answer). The rated voltages of three-phase systems, regardless of whether they are three-wire (delta) systems or four-wire (star/wye) systems are always quoted in terms of their 'line voltages'. So, to answer your question, the line voltage ('voltage between leads' ) of your three-phase system is 480 V. If your system is a four-wire star/wye system, then the phase voltage voltage, or 'line-to-neutral' (not 'phase to ground') voltage is the line voltage divided by 1.732, i.e. 277 V.
What voltage would be measured from any phase to ground on a 480 volt 3 phase wye system?
A voltage of 277 is the line to neutral (ground) voltage of a 480 volt wye three phase system. L1- N, L2 - N and L3 - N will give you 277 volts. L1 to L2. L2 to L3 and L3 to L1 will give you 480 volts.
What is the voltage between neutral and earth if neutral is broken?
Normally, it is zero.Except in very special cases, the neutral and ground (earth) conductors in a building are tied together at one point in the system, so ideally the voltage difference would be zero. The reason that it might not be zero is there is current flowing in the neutral and, thus, voltage drop in the neutral conductor. Since the ground conductor normally never has current flow (unless there is a fault), there will be a difference in voltage equal to the voltage drop across the neutral conductor, which varies with load (current).It should be 0V , but as per our earth pit maintaining that voltage will be varied even also not exceed 5V.
What is the measured Voltage between L1 and Earth on 3 phase system?
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.
What is the 1966 Volkswagen voltage system?
The original 1966 stock electrical system was 6 volt negative ground. In 1967 they went to 12 volt negative ground.
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.
