# What is nominal line voltage?

# Why is it not good to operate a transformer above its nominal voltage?

Overexcited Transformer. Operation above the rated supply voltage causes the ferromagnetic core to enter saturation; this means that the primary inductance is reduced and since the primary current is limited by primary resistance +inductance then the primary current will increase and possibly cause… the primary winding current capacity to be exceeded. Also the iron core hysteresis loss will likely increase and cause the core temperature to rise. We have not considered eddy currents in the core, probably these are less than the hysteresis core loss. Addition: also the stresses that caused by increasing the voltage will over heat the transformer by mean the life time is redused, for example: if the life time for a transformer is 20 years this number will decrease due to operating the transformer on a higher voltages than the rated... (MORE)

# Can i use a circuit breaker with 420V nominal voltage in 520V line voltage nominal current of circuit breaker is 1600A if I can how much current can pass from this circuit breaker?

NO! NO! NO!.
The circuit breaker must be rated for the line voltage used. Exceeding this limit can cause catastrophic failure!.
If you are really working on a 1600A bus, stop right now, ang go hire a professional! Your question indicates you are not qualified to work on this gear. YOU ARE GOING T…O KILL SOMEBODY ..
I'm not kidding about this. A breaker that is applied beyond its rating can arc over, and the resulting arc-flash can punch right through the panel cover, spraying vaporized metal on anyone unfortunate enough to be standing there. A 1600A bus can have a fault current of 20,000A OR MORE..
This is not something to even think about working on unless you are trained and absolutely know what you are doing! (MORE)

# What is typical line voltage tolerances?

Tolerances are about +/- 5 percent..
Scroll down to related links and look at "List of countries with mains power_plugs, voltages and frequencies - Wikipedia".

# What is the voltage of line voltage?

It varies from country to country. In the USA it is 110 volts, in the UK it 230 volts +/- 10%/6%..
In practise in the UK it is 240s volt +/- 6%, the slightly odd looking specification allows harmonisation with rest of Europe..
In all these cases, the mains voltage is supplied AC (alternating curre…nt) and the voltage is given as root mean square (RMS). The peak voltage in the UK is 384 volts. (MORE)

# How do you convert voltage line to voltage phase?

For questions of this type, it seems the main issue may be one of definitions and industry terms. See if this makes sense: Line voltage is a very ambiguous term. For instance, say you are wiring a doorbell transformer. You feed 120V into the primary, and 18V comes out the secondary. The electrician… would say the output is "low voltage" and the input is "line voltage". He simply means the building wiring, or "lines". Now, if you go out to the breaker panel, you will measure 120V from each "leg" to neutral, but you can also measure 240V from leg to leg. It's all line voltage. Line voltage simply means the voltage present in that particular power distribution system. Now the power in your house is "single phase" (well, in almost all homes, anyway). Single phase is fine for most anything, but motors are a special case. Motors need something to create a rotating magnetic field to get them turning. Single phase power doesn't have anything to do that, so they need some sort of a gimmick, like a capacitor, to create a "phase shift" to get the rotation. Single phase AC (alternating current) simply means the voltage goes positive then back down to zero, then negative then back up to zero. That's one complete cycle. The cycle is divided into 360 degrees, like a circle. The positive voltage goes from 0 to 180 degrees, and the negative half 180 back to 0. Now 3-phase power has, you guessed it, 3 hot wires. Each hot wire, when paired with a neutral, is a single-phase source. Heres the big difference: Phase A starts its positive cycle. When it is 120 degrees into the cycle, phase B starts going positive. When Phase B is 120 degrees finished with its cycle, phase C starts going positive. When phase C is 120 degrees into its cycle, that's a total of 360 degrees, and phase A is done with one cycle, and the whole process starts over. Picture 3 people doing "the wave" at a football game. Same principle. This time difference, or "phase shift" is what makes 3-phase power unique. 3-phase motors use the phase shift directly to produce the rotating magnetic field they need to turn. Think of 3 people in a circle, tossing a ball around. see the "circular" motion? Now picture two people tossing the ball back and forth. No circular motion there. That's the difference between single-phase and 3 phase. So, electricians use the term "phase" to refer to one of the three hot wires in a 3-phase (also correctly called multiphase or polyphase) power system. The term "phase" voltage is just as ambiguous as "line" voltage. To be accurate, you must specify whether you mean phase-to-phase voltage, or phase-to-neutral voltage. Confused? if you go into a large commercial building with 3-phase power, many times the incoming panel will have voltmeters on the front. In one building, the first meter will be labeled "phase-to-phase voltage", and the second meter will be labeled "phase-to-neutral voltage". Go into the building NEXT DOOR, and the same meters will be labeled "line-to-line voltage" and "line-to-neutral voltage". See? the terms are used pretty interchangably. In a 3-phase system, each phase, leg, or line has the same potential, or voltage (except for a very few wierd and pretty outdated systems). If you measure from phase A to Phase B you will get the same reading as B to C, also the same as C to A. So, measuring any two phases will tell you what the line voltage is, but that motor still needs all 3 phases to get the rotation. To understand the different voltages you find in a 3-phase system, see the related questions for another answer that relates to that subject. (MORE)

# What is the voltage of telephone line?

The standard voltage for the telephone system is 48 volts DC. Ringing voltage is much higher, around 90 volts AC at a low frequency. When you place a load of about 600 ohms on the line, you are "off hook" or connected. .
Telephone ringer voltage is 50.5 volts at standing and -50.5 volts at ringing

# What is the difference between line to line voltages and phase voltages?

The conductors that connect a three-phase supply to its load arecalled 'line conductors' or, more simply, 'lines'. The individualgenerator stator windings, transformer winding, or loads are called'phases'. Lines and line terminals are identified by colours, letters,numbers, or combinations of lette…rs and numbers. For example,A-B-C. Phases are identified by using the letters assigned to theline terminals between which the phases are connected, e.g A-B,B-C, and C-A. Voltages measured between lines ('line-to-line') are termed 'linevoltages', and currents that pass through the lines are called'line currents'. Voltages measured across a generator's windings, transformerwindings, or individual loads, are called 'phase voltages', and thecurrents that pass through these are called 'phase currents'. For a three-phase, three-wire, system, the phase- and line-voltagesare numerically-equal to each other. For a three-phase, four-wire,system, the line voltage is 1.732 times larger than the phasevoltage. (MORE)

# What is meant by nominal current or nominal voltage?

The word nominal means the lowest possible safe amount. So, nominalcurrent or nominal voltage is the lowest amount necessary toperform an electrical function like keeping a light turned on. Answer The original answer is incorrect. ' Nominal ' simply means' named '. So a 'nominal voltage' is th…e 'named voltage', asopposed to an 'actual voltage'. For example, the nominal voltage ofresidential supplies in the UK is 230 V; however, this value isallowed to vary between +10/-6% of the nominal voltage. In otherwords, a nominal voltage of 230 V may vary between 216 V and 253 V. (MORE)

# What is nominal zener voltage?

A zener diode has a voltage when it reachesbreak over it may be 5v 12v or other voltage as manufactured. The manufacture will produce a 5v zener or is it? This voltage can change from device to device but the mean or nominal voltage will be as close as 5v as possible. So when buying a 5v zener do n…ot expect 5v absolute but a nominal 5 v .
ZENERS are designed for a specific voltage [ THEREFORE NOMINAL] as mentioned above . depends on the voltage required it can be bought within a specific voltage -/+ a % of the breakdown (MORE)

# What is nominal voltage?

It is the rated voltage of an electric equipment. It is the voltage at which the device is designed to operate. Another Answer Nominal means 'named'. So a nominal voltage is the 'named' voltage. For example, the nominal voltage of the supply system in Britain is 230 V. But its actual value …is allowed to vary between 216.2 V and 253.0 V. (MORE)

# What is the voltage in a phone line?

about 4 volts - im nearly certain, but I dont remember the milliamps. hard answer to find online.

# How do you get line to neutral voltage form line to line voltage especially when there is unbalance in line to line voltage?

It is highly unusual for the supply system's line voltages to be unbalanced as the source is considered to be an infinite bus. On the other hand, it is not in the least unusual for the line currents to be unbalanced, as they are determined by the load . If a unbalanced star (wye) connected load has… no neutral, then the phase voltages will become unbalanced. (MORE)

# Can 24volts be line voltage?

No. Line voltage is 120v or some multiple there of. It is the potential that comes in from the grid and is found on the hot conductor in your house wiring..
24 volts is "low voltage" and tends to be used only for switching and lighting. Also, 24 volts is often DC (though not always) while line volt…age is invariably AC (MORE)

# Why is phase voltage not twice line voltage?

Line to line voltage is not the same as line to neutral voltage because line voltages are 120 degrees apart. They are related by: Line to neutral voltage * tan (120 degrees) = Line to neutral voltage * 1.73. Additional Comment For delta-connected systems, the line voltage is the same as the ph…ase voltage. For wye-connected systems, the line voltage is larger than the phase voltage by a factor of 1.732. The reason for this is as follows: Because any two phase voltages are displaced from each other by 120 o , they must be added vectorially , not algebraically, to find the line voltage. As the above answer points out, this means that the relationship between the two is the square-root of 3, or 1.732. (MORE)

# Does line to ground voltage always half the value of line to line voltage?

Line to Ground voltage = line to line voltage / 1.73 Answer It depends what configuration is being measured. In the case of the secondary of a split-phase distribution transformer used to supply residences in North America, the answer is yes. In the case of a star (wye) connected secondary di…stribution transformer used to supply residences in Europe, no: the line to ground voltage will be as described in the first answer. (MORE)

# Can you bypass capacitor in line voltage?

Sure, depending on the type of circuit used, a cap may not be used at all. If you could provide some more detail as to the application, we could answer the question more accurately. In fact, a coil (or inductor) is more commonly used in 'line' voltages. It provides a 'stiffening' effect to help keep… the line voltage at its desired value. (MORE)

# Why the transmission line are at high voltage?

To reduce the power losses or conduction losses in transmission lines. - Yes its right. I will give a slightly improved answer. The size of coper conductor used for transmission lines is inversely proportional to the square of voltage transmitted. Hence normally for long transmission lines …the voltage is increased to a very high value so as to reduce the amount of copper conductor used, hence reduce losses. Answer For a given load, the higher the supply voltage the lower the load current. The primary reason for using high-voltage transmission lines is to reduce the otherwise enormous voltage drops that would take place along the lines. The secondary reasons are to enable the use of conductors of practical size, and to minimise line losses. (MORE)

# What is difference between nominal and terminal voltage?

The rated voltage of a motor listed on the nameplate is called the terminal voltage. This indicates the actual voltage on the motors terminals at which at which the manufacturer designed to operate. Whereas, Nominal voltage is the design or configuration voltage of the electricity distribution syste…m. (MORE)

# Is line to line voltage equal to line voltage?

Yes. By definition, a line-to-line voltage is indeed called a line voltage . For delta-connected , three-wire, systems comprise three line conductors. The line voltage is numerically equal to the phase voltage. For wye-connected , four-wire, systems comprise three line conductors and a ne…utral conductor. Any line-to-neutral voltage is called a phase voltage. The line voltage is 1.732 times the value of the phase voltage. (MORE)

# Line to line voltage?

The conductors between a three-phase supply and a three-phase load are called line conductors not phase conductors, and the voltage measured between them are line voltages , not phase voltages. In the case of a delta supply, the line voltages are numerically equal to phase voltages, but the n…ame remains the same! I have to admit that many people call line conductors 'phase conductors', but many people also say 'irregardless' -that doesn't make it a real word!! (MORE)

# Relationship between line voltage and Phase voltage?

In a delta connection, the line voltage is equal to the phase voltage. In a star connection, the line voltage is 1.732 larger than the phase voltage.

# Why are there high and low voltage lines?

Because higher voltage can carry further. That answer is too simplistic. The actual reason is as follows: for any given load, the higher the supply voltage, the lower the resulting current. Lower currents mean smaller diameter transmission/distribution conductors can be used and the line losses(I… 2 R) are lower. (MORE)

# What is the nominal supply voltage?

The term, 'nominal', simply means 'named'. For example, the nominal supply voltage for a residence in the UK is 230 V . But this doesn't mean that the actual supply voltage is 230 V, because the supply voltage is allowed to vary by -6% and +10% of the nominal voltage. In other words, the actual… voltage could be anywhere within the range of 216.2 V to 253 V. In fact, during periods of heavy load, the actual voltage would tend towards the lower end of this range, whereas during periods of higher load, the actual voltage would vary towards the upper end. (MORE)

# What is the difference between line to line voltage to line to ground voltage?

On a three phase wye connected system line to line voltages will be the voltages between the terminals L1 - L2, L2 - L3, L3 - L1. On a three phase wye connected system line to ground voltages will be the voltages between the terminals L1 - N, L2 - N, L3 - N. To calculate the line to ground voltage d…ivide the line voltage by the square root of three which equals 1.73. An example, on a 480 volt wye system, line to line voltage is 480 volts and line to ground voltage is 480/1.73 = 277 volts. (MORE)

# What is high voltage line trap?

it is a high resistive paralell rezonans circuit which allows to cary signals between to electric station with limited bandwith Answer Line traps are a large inductors, suspended at the end of a high-voltage transmission line which prevents high-frequency communications/protection signals fro…m travelling beyond that point, by attenuating those signals. The inductive reactance of the inductor presents a high reactance to high-frequency signals but a low reactance to mains frequency (50/60 Hz). (MORE)

# What is phase voltage and line voltage?

The three 'hot' conductors supplying a three-phase system are called ' line conductors '. A line voltage is the voltage between any pair of line conductors. .
In a 'delta' connected system, phases are the loads connected between the three line conductors . So, for a delta-connected load, the p…hase voltages correspond to the line voltages. .
In a 'star' or 'wye' connected system, phases are the loads connected between the line conductors and a neutral conductor . So for a star-connected system, the phase voltages exist between any line conductor and the neutral conductor, and equate to 0.577 x the value of a line voltage (or, if you prefer, a line voltage is 1.732 x a phase voltage). .
To summarise, for delta connected systems, a line voltage is measured between line conductors, and a phase voltage is numerically equal to that line voltage. For star-connected systems, line voltages exist between line conductors, whereas phase voltages exist between any line conductor and a neutral conductor. (MORE)

# What are the voltages in transmission lines?

A metropolitan area is served by 69-kV and 138-kV networks, both feeding multiple distribution substations. A 230-kV network is also present, which feeds selected points within the 138-kV network. There are a couple of 500-kV nodes nearby that supply bulk-power from an interstate regional power pool…. In this example, both the 69-kV and 13.8-kV systems are sub-transmission, while the infrastructure operating at 230 kV and 500 kV is considered to be transmission. A largely rural area is served with a 230-kV network, in which cities and towns have 230-kV high-voltage distribution substations. There is also a 69-kV network to feed some of the smaller substations in outlying areas. The 230-kV network is the transmission network while the 69-kV network represents a sub-transmission system. These substations may also include transformers connecting higher-voltage transmission with a lower-voltage sub-transmission network. The distribution system provides the delivery network to individual homes and businesses. Common distribution voltages include 12.5 kV, 13.2kV. For most of the regulated history of electric utilities, the voltages used in the distribution delivery systems were allowed to vary within defined limits, mostly plus or minus 5%. As systems operated constantly at the upper 5% limit, these limits became the new nominal operating level. Therefore, 7.2/12.47-kV systems became 7.6/13.2-kV systems, which then evolved to 7.9/13.8-kV systems. In addition, the 7.2/12.47-kV system was doubled to provide the 14.4/25-kV system often used by the aforementioned REA delivery systems serving remote, sparsely populated areas. The desire for even higher distribution primary delivery voltages required an evolution of the transmission voltages used in the early years of electric system development. The 11-kV delta lines were upgraded, again by a factor of three, to 33 kV. As these were consistently operated at a 5% operating level, to reduce losses and offset voltage drop on the lines, a new nominal level of 34.5 kV was established. Power transmission lines by their nature have to carry power long distances. Since there is a voltage drop involved, the voltage is increased at the source so that the loss in the transmission lines still allow usable power to be delivered at the user location. The higher voltage is reduced by a transformer near your home to the standard 120 to 240 VAC. (MORE)

# What is the relationship between phase voltage and line voltage?

VP = VL / â3 or VL = VP*â3. this will give you the values for a star connected system. If you using delta the VP = VL

# What is the Difference between nominal voltage and operating voltage?

Nominal voltage is the 'named' voltage -for example, the nominal supply voltage in the UK is 230 V. But this is not necessarily the actual voltage at a particular time. A nominal voltage is normally expressed together with the percentage by which it is permitted to vary from that stated value. Fo…r example, in the UK, the nominal voltage is expressed as: 230 V +10% / -6% --in other words it is allowed to vary between 216.2 and 253 V. The term, operating voltage , isn't actually defined anywhere, but is usually taken to mean the actual voltage supplied to a device at any particular instant, and this should always fall within the allowable range of the supply system's specified nominal voltage. The operating voltage can be found simply by measuring it with a voltmeter. (MORE)

# Is 208 line voltage residential?

208 v three-phase supplies are an option for American properties,because the line to neutral voltage is 120 v.

# 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. Answer There is no such thing as a 'phase-to-phase' or a 'phase-to-neutral' voltage. The cor…rect 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. (MORE)

# Is line voltage understood as any voltage?

Line voltage is understood as the voltage that the device or appliance needs to operate on. It is also referred to as the devices working voltage. Once the proper line voltage or working voltage is applied to the device it may be transformed to different voltages for different internal component cir…cuits. (MORE)

# How do you calculate line voltage from phase voltage?

It depends on the system. For a delta-connected , three-wire, system, the line voltage is exactly the same as the phase voltage. For a wye-connected , four-wire, system, the line voltage is 1.732 (the square-root of 3) times the phase voltage.

# Why is the voltage drop large in a high voltage transmission line?

The length of the wire causes resistive load to be distributed along line. This accumulated resistance causes the voltage drop. Answer The voltage drop along a high-voltage transmission line isn't large in relation to the operating voltage of the line. One of the advantages (there are many) of… using high voltages is that, for a given load, the line current is relatively low -so the voltage drop along the line is also relatively low. (MORE)

# What is the relation line voltage to phase voltage in star connection?

Phase to phase voltage is 1.732 (the square root of 3) times the phase to star point (neutral) line voltage. e.g. if the line voltage is 220V phase voltage = 1.732x220 = 380V (approx) Additional Answer You might also like to know that the line voltage leads the phase voltage by 30 electric…al degrees. And, incidentally, the correct expressions are 'line-to-line' not 'phase-to-phase', and 'line-to-neutral' not 'phase-to-neutral' (think about it, a line voltage is measured from the junctions between adjacent phases, so they cannot be 'phase to phase'!) (MORE)

# What are the phase voltages if the line voltages are 100volts?

It depends on the type of three-phase system. If it's a three-wire system , then the phase voltage is numerically equal to the line voltage. If it's a four-wire system , then the phase voltage is numerically equal to the line voltage divided by 1.732 -in your example, this works out to be 5.77 V.

# What is the typical nominal voltages found in residential lighting?

It depends on the country in which you live. In Europe, it's 230 V; in North American it's 120 V.

# What is line voltage in star connection?

A star-connection is associated with a three-phase, four-wire, system which comprises three line conductors and a neutral conductor. The voltage between any two line conductors is called a line voltage, whereas the voltage between any line conductor and the neutral conductor is called a phase voltag…e. For a balanced system, the line voltage is 1.732 time the phase voltage . So, when a 400/230 V system is being discussed, the line voltage is 400 V and the phase voltage is 230 V. (MORE)

# What is the voltage in overhead power lines?

you can get an idea by looking at the insulators they must function in rain or snow dew can collect on the insulator they are made of porcelain with a glazed surface 3" diameter gives about 3" length of dew coated glaze and is safe at about 5000V so if the insulator has 3 skirts its a…bout 15,000V 10 skirts about 50,000V the drops to the houses are low voltage and may be as little as 1/2 of glazed surface 600V or less (MORE)

# Are 250 voltage reading considered to be nominal 240 volts?

Different countries have different legal limits to how much their electricity supply voltages may vary. In the UK, for example, the nominal supply voltage for residential supplies is 230 V, but this is allowed to vary between -6% and +10%. So, as you can see, and 'actual' voltage of 250 V is within …the allowable upper limit (253 V) for the nominal voltage of 230 V. So, to answer your question, you need to check what the allowable variation is at your location (your electricity supplier can confirm this) -I would guess that 250 V would be well within the allowance for 240 V. (MORE)

# What are the voltages in distribution lines?

There are three levels of nominal voltage used in the electricity supply system -those associated with transmission systems , and those associated with high- and low-voltage distribution systems . The voltages depend on the standards of the countries in which the systems are constructed. For examp…le, in the UK, .
transmission voltages: 400 kV, 275 kV .
h.v. distribution voltages: 132 kV, 66 kV, 33 kV, and 11 kV .
l.v. distribution voltages: 400/230 V (MORE)

# What does a transformer do to a voltage in a power line?

At the power station end, it steps the generated voltage up to a very high level for transmission. At load centres, it steps down the transmitted voltage for distribution.

# What are line voltage and phase voltage?

The voltage in the middle of line and impartial is known as the stage voltage. where the voltage between two lines called the line voltage.

# What is nominal voltage in the US?

AC current to residences in North America is 110 volts at 60 hertz, but 220 V and 440 V are available for industries that need it.

# How many voltage 3phase line?

For a three-phase, three-wire, system there are three conductors called 'line conductors', and there is a voltage between any pair of line conductors, so there are three voltages..
For a three-phase, four-wire, system there are four conductors: three 'line conductors' and a 'neutral' conductor. S…o there are three line voltages (voltages between lines) and three phase voltages (voltages between any line conductor and a neutral conductor).. (MORE)

# What voltage is line voltage?

Line voltage (line-to-line voltage) in a polyphase system is the voltage between two given phases. The potentail difference between the line and nuetral ...230 volts. Between lines is 415 volts

# Is a Line voltage understood to be any voltage?

The Line normally refers to the live wire in a single-phase systemand the three live wire of a 3-phase system. In a 3-phase system the line voltage is usually quoted as thenominal voltage, and that is the voltage between any two of thelive wires. The voltage between one of the lines and neutral is1…/sqrt(3) times less. (MORE)

# What voltage to line a tattoo with?

There are a LOT of variables - how tough is the customer's skin, the needle configuration, what kind of machine you have...you REALLY need to apprentice with someone to learn this.

# How the voltage regulation in 33kv line?

It does not depend on the line. The regulation is the percentagechange in voltage caused by applying the full load current, andthat depends on the transformer supplying the line. A value of 5%would be typical.

# What is line voltage that it is understood to be any voltage?

Your question is confusing and probably reflects certainmisunderstandings. But I will attempt to give an answer. .
household single phase line voltage is 110 VAC, 115 VAC, or 120VAC in the US and 230 VAC in most other countries .
household "two phase" line voltage is 220 VAC, 230 VAC, or 240VAC i…n the US (this system was originally developed by Edison forhis DC system, but after the US converted to AC it was retained andadapted, it is not generally used outside North America) .
industrial users usually use three phase, which depending ontheir industrial needs may be 240 VAC, 480 VAC, 600 VAC, etc. andcould be either "delta" (3 wire) or "wye" (4 wire)configeration .
distribution system line voltage is usually a few thousand VACto a few tens of thousand VAC .
transmission system line voltage is usually a few hundredthousand VAC to a few million VAC almost always "delta" (3 wire)configuration to reduce the cost of wire, sometimes on very longtransmission lines voltage of about a million VDC are used (MORE)