Neutral Shift in Star Side

Unbalance is simply the expression of single phase loads on a three-phase supply. If the circuit protection devices are correctly set, then nothing noticeable will happen.

What will be the difference it makes due to unbalanced loads in earthed neutral and unearthed neutral systems?.

f d neutral aint bonded 2 erth thN a voltage shift cn occur f Ull wrt n nonsense TXT, Ull gt a nonsense ans

Mr. Hamid,
unbalance is caused by the load. Neutral point in a Star Winding is the reference point where the voltage is zero or balanced from 3-phases. To eliminate the problem of Neutral shift (or Floating Neutral Condition), arching grounds due to any problems/faults in the system, the Neutral Grounding is adopted in electrical systems.
Just draw yourself a simple diagram for a Star wound source feeding a 3ph load - both for an Earthed & Unearthed star points of source. Do this for both balanced & unbalanced loads separately. In all the above, no change in circuit values. Calculate currents drawn by the different loads in earthed system, apply same current in unearthed system and calculate back the voltage drops across the each limb of source winding /load. You will find the difference yourself.
If your system's star point is not earthed, to keep the system in balanced condition, during any imbalances in the loads or during any fault, the neutral will get shifted.
sitaram.