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 many double suspension hardware fittings are required on a double circuit transmission tower?
Is potential difference materials property ..? if yes tnen how.. explain brifly.
The magnitude of sum of two sinusoidal av voltage is equal to 230 volt.the magnitude of each individual voltage is also equal to 230 volt.what must be the phase difference between voltages?
What is the important precuations need tocarried out while working with Electrolite in Battery PM?
What is the height of DA, DAL, DB, DC & DDE tower?
advantage of motor design on higher power factor . normally motors are designed for .8 power factor. what is advantage of designing at .88 power factor
hello friends this is krunal here.. i have applied for he officer train in hpcl electrical stream.. any one who have applied before for electrical stream please help me out.. post ur reply to my mail id: krunal_airforce@yahoo.com.. any tips, old questions for paper or any help will do.. plz help me.. your faithfully, Krunal Darji
pls tell me about ups internal connection & we have given only 3 phase supply to ups system how get 4 wire (R Y B N )
In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.
Draw a block diagramof Three UPS systems connected in Parallel mode?
Dear Sir/Madam, I have one questions we have three steam turbines and one Gas turbine and our industry linked with the public network, we have protection system one of the protection is reverse power we can export just four MW only i would like to ask about how to calculate the reverse power. Thank you in advance best regards
Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.
my diploma certificate in my higher education college
what is alluminium arm in ab conductors
WHAT IS DIFFERENCE BETWEEN CAPACITOR AND CAPACITANCE?
