Answer / chander shekher

VCB & ACB are required for protection of electrical equipment/system.
VCB protects for over load, Earth Fault, Short Circuit,for HT Supply
whereas ACB are used for overload, earth fault & Short circuit for LT Supply

why Y CONNECTION IS BETTER INTERMS OF EFFICIENCY AND P.F FOR A LAOD LESS THAN 40% AND WHY AFTER DELTA IS BETTER FOR > 40%

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