Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / naveen
kVA is the unit for apparent power. Apparent power consists
of active and reactive power. Active power is the share of
the apparent power which transmits energy from the source
(generator) to the user. Reactive power is the share of the
apparent power which represents a useless oscillation of
energy from the source to the user and back again. It occurs
when on account of some »inertia« in the system there is a
phase shift between voltage and current. This means that the
current does not change polarity synchronous with the
voltage. But the heat generated in a winding as well as the
eddy current losses generated in a transformer core depend
on the current only, regardless of whether it aligns with
the voltage or not. Therefore the heat is always
proportional to the square of the current amplitude,
irrespective of the phase angle (the shift between voltage
and current). So a transformer has to be rated (and
selected) by apparent power.
| Is This Answer Correct ? | 8 Yes | 4 No |
Post New Answer View All Answers
A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.
DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.
The power factor of the fixed load is 0.8, now the p.f is varying from 0.8 to 0.5.
how calculate gd2 of ht motors
HOW WORK HEAT PLATE EXCHANGER
I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.
I Need standard operation procedure(SOP)for 500kva Oil type transformer oil filtration & Procedure for IR value checking.
What is the formula of frequency ?
1. transformer design formula ? 2. how to calculate the primary turns and secondry turns ? 3. core types ? 4. how to find the primary current and secondry current ? 5. how to calculate the stacking factor ? 6. range of fulx density ?
HOW TO CALCULATE S/C,O/C,E/F OF ACB.
In between UPS out going changer over switch and ups raising main input, both side cable gland producing heat but the cable doesn't get heat,Why?
Is it possible to use a S1 duty class motor for crane application (S4)? If not, why?
What are the various kind of cables used for transmission?
Why 1/3 is used in symmetrical components?
Why is the air gap between the pole pieces and the armature kept very small?
