A balanced three phase load is where the current flowing in all three phases of the load are reasonably close to each other.
Another answer
When the voltage and measured current draw do not deviate by more than 2 percent under load.
AnswerA balanced three-phase load is one in which each of the three loads is identical in all respects (magnitude and phase). Further to the first answer, the three line currents must not all be 'reasonably close', they must be identical -i.e. the same value and phase relationship.
It is a load on a three-phase system that produces unequal load currents in the three phases. The ideal load is always balanced, with equal currents in the 3 live wires.
In LV power distribution it is usually not possible to guarantee a balanced load except by aggregating up a lot of loads and hoping that the total load is reasonably balanced. Thus a street of houses will usually provide a reasonably balanced load on the three-phase supply even though each house is connected to only one phase.
An unbalanced load prevents the generator delivering its maximum power. That is because each phase has an equal upper current limit that it can deliver, and in an unbalanced system, if one phase is delivering the rated current it follows that the others are not.
The electrical term for this condition is called an unbalanced load.
three phase load is said to be balanced when the impedance and power factor of each load is equal.in this condition phasor sum of currents and phase voltages add up to zero.
Balanced load means no unbalanced currents, so the neutral current should be near zero.
I think you probably mean is a neutral conductor necessary for a balanced star-connected load? If this is what you mean, then the answer is no, it isn't, as the phasor-sum of the phase currents will equal zero. Often, though, it is difficult to achieve a balanced load, so a neutral is then necessary, as it is needed to provide a return path for the unbalanced current -without this neutral, the phase voltages would change and become unbalanced.
Unbalanced Load was created on 2009-08-04.
To carry the unbalanced load current.
An unbalanced load prevents the generator delivering its maximum power. That is because each phase has an equal upper current limit that it can deliver, and in an unbalanced system, if one phase is delivering the rated current it follows that the others are not.
No
A three-phase 'unbalanced' system refers to the load, as the supply voltages are unaffected by load. So the phase-angle and, therefore, the power factor of each phase will be different -i.e. there will be three different power factors.
If the load is connected in wye (star) and it has a neutral, then the vectorial-difference of the phase currents will flow in the neutral and there will be no problem. On the other hand, if there is no neutral, then an unbalanced load would cause unbalanced phase voltages.
The electrical term for this condition is called an unbalanced load.
You are, presumably, talking about an unbalanced three-phase load. The answer is no, because the wattmeter takes unbalanced loads into account.
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.
'Balanced loads' apply to three-phase a.c. loads. A three-phase kilowatt hour meter will measure both balanced and unbalanced loads, when correctly connected.
"The load was CUMBERSOME on the small cart" Like being ungainly, unbalanced.
A sloping road surface or unbalanced load.