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Why the neutral cable takes high current than the phase lines in three phase installation?
Wiki User
∙ 13y ago
In a properly balanced three phase system, there is negligible current on neutral. If there is substantial current on neutral, then the system is not balanced and/or something is wrong.
Wiki User
∙ 13y ago
In a balanced three-phase system, the current in the neutral wire should ideally be minimal as the three phase conductors carry equal and opposite currents that cancel out in the neutral wire. However, if the loads are unbalanced, the neutral wire may have higher current due to the uneven distribution of power among the phases. This can happen when loads on each phase are different or when single-phase loads are connected between a phase and neutral, leading to increased neutral current.
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Is the neutral conductor a live wire?
YES. ACTUALLY THE SIZE OF NEUTRAL BUSBAR IS BIGGER THAN THE PHASE CURRENT IF ALL THE LOADS IN A 3 PHASE PANELBOARD ARE ALL SINGLE PHASE. In single-phase, which is found in homes, when an appliance is operating, the amps (current) will be equal in the "hot leg" and the neutral. So current IS passing through the neutral wire. In 3-Phase, which is found in a lot of commersial and industrial buildings (including schools), very little current will exist in the neutral IF the current load is BALANCED EQUALLY between the 3 phases. At any given time, however, it is almost impossible to balance the current exactly. So current, even a small amount, will probably exist in the neutral wire. Most certainly enough to harm or kill you! Be it at home, or at work, when the lamp at your desk or by your bed is on, current is flowing through BOTH of the lamp wires!
If the loads were only 240v on a single phase 240v system with a center tapped transformer the neutral conductor would carry?
If the loads are balanced, the neutral conductor in a single-phase 240V system with a center-tapped transformer would carry no current, as the currents flowing in opposite directions would cancel each other out. If the loads are unbalanced, the neutral conductor would carry the difference in currents between the two lines.
When using 10-2 wire for a 3 wire dryer can the neutral wire be the uninsulated ground wire or does it have to be insulated?
The neutral wire should be insulated when using 10-2 wire for a 3-wire dryer connection. The uninsulated wire would typically be the ground wire and should not be used as the neutral in this application to meet safety standards.
Why inductance of a coaxial cable is expected to increase when the radius of the outer conductor is increased?
Increasing the radius of the outer conductor in a coaxial cable increases the surface area for the magnetic field lines to interact with, resulting in more inductance. This is because the magnetic field generated by the current in the inner conductor induces a voltage in the outer conductor, creating an opposition to changes in current flow, which is the essence of inductance.
If you have 2 old conduit lines in the attic that you can feel the current when you touch the how do you replace them and witch wire is black and which is white?
If you can feel an electrical current when you touch old conduit lines in the attic, it's important to turn off the power at the circuit breaker before attempting to replace them. Once the power is off, you can replace the conduit lines using new wires following the color coding standards - typically, black is used for hot wires and white is used for neutral wires in residential electrical systems. However, it's always advisable to use a voltage tester to confirm which wire is carrying the current before starting the replacement.
What has the author Leonid Petrovich Smirnov written?
Leonid Petrovich Smirnov has written: 'Cable installation' -- subject(s): Electric cables, Electric lines
What is the average price of data cable?
For a basic, one line installation, the pricing can average from $100 to $125. It all depends on how many lines you want.
What is the maximum neutral current for a three phase delta star system?
It is either a delta or a star, it can't be both. A delta system doesn't have a neutral so the question must be about a star system. A high neutral current happens for example when one line is disconnected, and the neutral current then equals the current in the other two lines, which is the same current as when two lines are disconnected leaving only one line.There might be ways of calculating how to make the neutral current larger by using unusual power factors, but the above is a useful working maximum that allows all four wires of a four-wire star system to be the same size.AnswerThe term, 'delta-star', refers to a three-phase transformer connection in which the primary windings are connected in delta while the secondary windings are connected in star (wye). This is the standard three-phase connection, in Europe, for distribution transformers. Single-phase loads are connected to the secondary between alternate lines and neutral, in order to try to and balance the resulting load and minimise any resulting neutral current. Obviously, however, without having any specifications supplied, it is quite impossible to answer this question.
What is line phase neutral?
Line, phase, neutral are terms used to describe the conductors in a three-phase system. The three live wires are called 'lines', and less correctly, 'phases'. Neutral is used for the fourth wire which in a balanced system carries no current.
What is A technology that uses cable TV lines for data transmission?
cable modem - A technologythat uses cable TV lines for data transmission
Does a 4corex630 sq mm cable carry the same current as a single core 630 sq mm cable?
4-core 630 mm-sq cable sounds like 4 cores each of 630 mm-sq as used on 400 kV power lines, in which case it carries 4 times the current.
What if the fourth wire in a three phase is having impedance would the current in the neutral line remain to have a value of zero?
When the system is in balance, with three equal phase currents, there is no current in the neutral 4th wire and it is not needed. However if the load is unbalanced, the neutral is needed to maintain the star point at zero volts.So for example a street of houses fed by a 3-phase supply needs a neutral because the houses draw unequal currents from the different phase lines, although a large enough collection of houses would tend to balance itself out.If a three-pase system has equal currents the current in the neutral is zero. If two phases draw equal current but the third has no load, there is an equal current in the neutral, and if one phase draws current but the other two have no load, there is again an equal current in the neutral.ANOTHER ANSWERA three-phase, four-wire, system comprises three line conductors and a neutral conductor. If the load supplied by this system is balanced (i.e. the loads connected between each line and neutral are identical in all respects), then no current will flow in the neutral conductor regardless of its impedance. If the load is unbalanced, then a neutral current will flow in the neutral conductor. In other words, the impedance of the neutral conductor plays no part in whether or not there is a neutral current.
What lines are connected to a motorcycle carburetor?
Fuel line. Throttle lines of which there are 2. One is the accelerator cable and the other is the return cable sometimes called the idle cable.
Cable lines of sky cable in baguio?
mountain view sky
Can you Convert a single 220 line into two 120 lines?
Answer for USA, Canada and countries running a 60 Hz power supply service. Yes, but you will need to change the wire from a 2 wire cable to a 3 wire cable. This allows the neutral to be brought out to the load.
What are cable television lines and telephone lines examples of?
Communication channels.
Is a cable company usually a DSL Internet Provider, too?
No. Cable internet is sent over cable lines, while DSL is sent over telephone lines. I know of no company that is both a cable company and a telephone company.
