What is the difference between line and neutral?
Hence, touching neutral will not cause current to flow through human body into ground. Live line, however has a potential that rapidly changes from highly positive relative to ground potential, to highly negative.
Why neutral wire has no current?
In this case a fault between one phase and ground would not cause any significant current. In a three-phase linear circuit with three identical resistive or reactive loads, the neutral carries no current. The neutral carries current if the loads on each phase are not identical.
What is meant by line current?
Line current is the measured amount of direct current flowing in a pipeline. It is an indicator of the degree of reactivity and corrosion experienced on the pipeline’s surface.
Is there a neutral wire in the middle of Y connection?
In a Y-connected system, there may or may not (Figure below) be a neutral wire attached at the junction point in the middle, although it certainly helps alleviate potential problems should one element of a three-phase load fail open, as discussed earlier. Three-phase, three-wire “Y” connection does not use the neutral wire.
How is line current related to line voltage?
The angle Ф between line currents and respective line voltages are (30°+Ф), i.e. each line current is lagging (30°+Ф) from the corresponding line voltage. It is seen from fig (3a) that each line is in series with individual phase winding, therefore, the value of line current is same as in Phase windings to which the line is connected. i.e.;
What are the phase currents in Y Connect?
In the case of Y-connect loads, the currents in the lines aA, bB, and cC are also the phase currents ( the currents carried by the phase impedances). If the magnitudes of the phase and line currents are Ip and IL, respectively, then IL=Ip, and (7) becomes
Which is the sum of line neutral voltages?
The vector diagram below represents this magnitude and phase angle change. Following important points to be noted: Line-Neutral Voltage: For a balanced system, the sum of line-neutral voltages (Van +Vbn +Vcn) is zero.