for a balanced system ? no, cause 5th harmonics has purely negative sequence in balanced system, only zero sequences can flow. Unless the system is unbalanced, then only the 5th harmonics zero sequence component will flow in the neutral.
The wye is a type of power system where there are three current carrying legs making up the ends o the Y, a neutral current return leg and a solidly grounded to earth leg are connected at the middle of the Y. It is the most common type of power system and the most stable for multiple three phase and single phase loads. Another type of power system is a delta. Delta systems are more common in industrial settings with mostly three phase loads attached.
A system that a middlist is judging is called Arbitary system.
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Balanced load means no unbalanced currents, so the neutral current should be near zero.
Yes, you can reduce the neutral in a three phase system. you must figure the unbalanced current the neutral will carry and also make allowances for any harmonics that may be present.
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.
Earthing point is where conductor is directly connected to ground and its potential is always zero. Neutral is a return path in single phase system and in three phase system Neutral point will have zero potential if all the loads are balanced in the system. In un balanced three phase system even neutral point will have some potential
It would happen in case of 3phase domestic use where consumer side load balancing is not being done and there is loose connection in the neutral wire. Due to the unbalance and poor neutral, the system neutral will be shifted and un balanced voltages will be recorded in all the 3 phases of the house. The phase loaded with much utilities will indicate less voltage and other will have high voltage. Gadgets connected to this phase will be damaged.
The odd harmonic are the predominate harmonics, their current from each phase in a four-wire wye or star system will be additive in the neutral, instead of cancelling can result in current harmonic distortion levels over 30%.
The fundamental is defined as the primary frequency of the system. In other words the fundamental of a 60 hz system is 60 hertz x 1 = 60 hz In discussions involving harmonics is is common to see terms such as the 3rd harmonic. This means that it is a frequency that is 3x the fundamental or 180 hz.
Because the voltage in the three live wires is 'phased' by one third of a cycle, or 120 degrees, and if the three currents have equal amplitude they add up to zero in the neutral. When one line peaks at +1 amp, let's say, the other two are both at -0.5 amps and there is nothing in the neutral. That state of affairs remains the same at all parts of the AC cycle.
Harmonics are a multiple of the fundamental frequency. If the power frequency is 60Hz, harmonics occur at 120Hz, 180Hz, 240Hz, etc.
Any nonlinear load on a system generates harmonics. Exampes are the magnetic core of a transformer or equipment which uses rectifiers to produce direct current. The triplen harmonics are unpopular because they add on a three-phase system, so they produce current in the neutral, which a three-phase system in balance does not.
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.
The current carried by the neutral of a three phase four wire system is the un balanced current. If the three phase system was completely balanced on all three phases there would be no need for a neutral, eg a three phase motor. This neutral current will be less that the phase current so a reduction in the neutral size is allowed.