Unbalanced Current :-
On distribution level, the load imperfections cause current unbalance which travel to transformer and cause unbalance in the three phase voltage. Not only in the distribution side but through the transformer, voltage unbalances disturbs the high voltage power system as well.
In fact, current unbalance can be 20 times as high as the voltage unbalance. Unevenly distributed single-phase loads can cause the latter across. a 3-phase power system. In other words, instead of balancing phase-to-neutral loads evenly across all three phases, more are distributed onto one or two phases.
Unbalanced distribution of loads :
Usually in commercial and residential buildings most of loads are single-phase but the main feeders to the building are three phase. So phase scheduling is done to balance these single phase loads on the three phase supply so we have a balanced system.
As living style changes constantly so loads also changes, just imagine that many of your neighbors install new heavy duty appliances like air conditioners and assume the added loads is on phase A only. Now our system is not balanced anymore Thus the neutral cable will have high amount of current due to the vector sum of all currents is not equal to zero.
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Our lab is well equipped, meeting National/ International Standards and accredited by NABL (National Accreditation Board for Testing & Calibration Laboratories) under Dept. of Science & Technology (DST), Govt. of India, New Delhi.
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