Answer Posted / saida shaik
KVA is the unit for apparent power
Apparent power consists of Active and Reactive power. Active power is transmits energy from the source to the user. Reactive power is represents a usless oscillation of energy from the source to the user and back again. Reactive power occurs when on account of some inertia in the system there is a phase shift between voltage and current. This means that the current dose not change polarity synchronous with the volage but the heat generated in a winding as well as the eddy current losses generated in a t/f core depend on the current only ,regardless of whether it aligns with the voltage or not. Therefore the heat is always propotional to the square of the current amplitude irrespective ofphase angle so a t/f has to be rated by apparent power.(it means KVA instead of KW)
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
how to calculate the step resistance for slipring induction motor,how you deside the no of step for that?
Can XLPE/SWB/PVC (P3) 7C X 2.5mm2 be replaced by Can XLPE/SWB/PVC (P2) 7C X 2.5mm2??? P3 vs P2
Where can I get Iidian straderd specifications for electrical items or works in web? please help me.
Difference between a pilot wire and a normal conductor?
at what rate the micro controller increment its timer....is it 1micro seconds or 1/(12*10^6) seconds
When lag/lead/lag-lead compensation is employed?
how to set the time in digital timer ?
What is the implications when 600 hp motor is started when the unit is running with Transformer of capacity 1500 KVA and DG set of 1000kva
Role of active and reactive Power sharing in between two synchronized Generators, Droop Setting role ?
What is pd controller?
EXPLAIN METOD OF IMAGE OF TRANSMISSION LINE/ WHAT ARE ITS PRACTICAL APPLICATION?
What is the difference between PLC and Embeded system
what is residuel magnetism. and how order lead acid batteries for 24 volt. emergency lighting system.
How can two 3 phase transformers of same KVA and Voltage be connected in parallel?
What is the armature mmf in a D.C machine?