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Why there is zero volt across neutral earth of isolation transformer?
Geez, because it is just that; A NEUTRAL EARTH, there should be equal potential on each side, therefore no current flow, and no voltage.
Why neutral wire carry no current?
Usually yes, sometimes no. For instance: The neutral in a single-phase, 120V (in the US) branch circuit, such as one feeding receptacles, does. The neutral in a 120/240V circuit feeding a 240V appliance does not. The neutral in a 480Y feeder feeding a balanced load does not. A neutral is there because of the possibility that current flow could occur. For instance, in a US household, with 120/240V service, if you plugged in 5 100 watt lamps on one side of the line, and another 5 100 watt lamps on the other hot leg, there would be no neutral current in the service cable feeding the house. The loads are said to be 'balanced'. The 500 watts of power flowing into the first hot leg goes through the first set of lamps, then the second set, then out the other hot wire. Neutral current still flows in the individual branch circuits, of course. Now, if you moved one of the lamps to the other side, 600 watts would be coming into that side, but only 400 would be going back out the other hot wire, so 200 watts would flow through the neutral.
How 3 phase unbalanced current flow through neutral?
Kirchoff's Current Law states that the signed sum of the currents entering a node is zero. If the neutral point is the node, then, in a balanced system, hot matches the other two hots, resulting in no current through neutral. Any imbalance, either due to neutral to hot current flow that is not balanced by the other two neutral to hot current flows, or due to ground fault, will result in a current flow on neutral, so that the sum of zero is maintained.When you think about this, remember that the law said "signed" and "entering". When you analyze a circuit, simply be consistent in your usage. For instance, in a balanced system, current entering the neutral node from one hot side is considered positive, and the current entering the neutral node from the other hot side is considered negative, i.e. it is leaving, not entering.This gets more complicated in three phase power, because now you have to consider phase angle, but the concept is exactly the same...If you are connected in wye, with a neutral, then the neutral conductor will have zero current on it only if the three phase hots have the same current on each. If you do vector analysis on this, adding up sin(x), sin(x+120), and sin(x+240), you get zero.The same thing happens when you are delta connected, without a neutral, but then the imbalance occurs out in the distribution system, beyond the service transformers, because the distribution system is generally a wye system.Ground fault will, of course, "change the rules", because you no longer have only four paths to that neutral point node. In fact, that is how ground fault current interrupters (GFCI's) work - they measure outbound current and compare it to inbound current - they must be equal and opposite, i.e. they cancel each other out - otherwise there is another path - a ground fault - and the device trips.
Voltage is pressure and current is flow what opposes flow?
Reverse current.
What is the reason why the neutral is not used on high resistance grounding?
The question doesn't provide enough detail to give a definitive answer. The neutral PD is often used in protective functions on high resistance grounded generators (when grounded through a transformer). High resistance grounding limits the use of transformers - you must be using balanced loads, since very little current will flow (typically around 5-20amperes max) to the neutral. Because of this, phase to neutral values (such as voltage) are meaningless. Any current flowing in the neutral will cause an offset in all three phases from neutral. Since the neutral is high resistance grounded, it does not take a significant amount of current to cause significant offset.
What will happen without a neutral wire?
Current needs a return path to earth to flow. The neutral carries this flow. Therefore, no neutral and no current flow.
Does neutral carry current in an electrical circuit?
No, neutral does not carry current in an electrical circuit. It is used as a return path for current to flow back to the source.
When the neutral switch is open where do the line current flow to?
There is never a switch installed in a neutral line.
When phase and neutral are glowing what is the problem in circuit?
There is more current flowing and the wire can not flow that much current.
Do neutral wires carry current in an electrical circuit?
No, neutral wires do not carry current in an electrical circuit. They are used to complete the circuit and provide a return path for the current to flow back to the source.
Is there any current flow through the neutral wire of single phase motor?
Yes. It is identical to the line current.
Can ground conductor use as a neutral conductor in a house wiring?
No. Absolutely not. The ground conductor is not rated to carry constant current flow. It is only rate to carry fault current flow.
What is the purpose of the neutral wire in an electrical circuit?
The purpose of the neutral wire in an electrical circuit is to provide a return path for the current to flow back to the power source, completing the circuit and ensuring a balanced flow of electricity.
What is the function of a neutral wire in an electrical circuit?
The function of a neutral wire in an electrical circuit is to provide a return path for the current to flow back to the power source, completing the circuit and ensuring a balanced flow of electricity.
What is the neutral wire used for in electrical circuits?
The neutral wire in electrical circuits is used to complete the circuit and provide a return path for the current to flow back to the power source. It carries the current back to the electrical panel to ensure a balanced flow of electricity and to prevent electrical hazards.
What is the reason for using a neutral current transformer on a transformer?
A current transformer is primarily used at the neutral point of a transformer for earth fault protection. A neutral current transformer will measure any ground fault current which will essentially flow from the star point of the transformer. A fault-detection device other devices is connected to the current transformer and, if the fault current exceeds a certain trigger value, the fault-detection device will give a trip command to an earth-fault relay to disconnect the supply of electricity to the transformer.
Why neutral wire does not carry current in closed ac circuit?
The neutral wire does carry current in a closed AC circuit. Clamp a clamp on amp meter around the neutral wire directly after the circuit load and it will read the same current as is on the "hot" wire.
