Interested to Buy Any Domain ? << Click Here >> for more details...
why generator and t/f ratings given in kva & motor rating
is in KW?
- 6 Answers
- 13375 Views
- I also Faced
- E-Mail Answers
Answer Posted / karthik
Watt is the product of voltage, current and power factor.
VA is the product of voltage, current and power factor.
Motor is an inductive load and operates at a power factor
less than unity. So the current drawn by it is more than the
apparent at constant power.
For a 3ph motor, P=√3*V*I*cosø where V,√3 are constants.
At constant P, I*cosø is also a constant. if pf cosø
varies, I too varies. i.e. if pf is poor (cosø reduces), I
increases. Hence rating needs to be specified in KW.
Whereas for a generator, it isn't a load. It supplies power
to a load. So power factor doesn't come into picture. Hence
its rating is specified in KVA.
| Is This Answer Correct ? | 11 Yes | 2 No |
Post New Answer View All Answers
why ahould you show client/engineer activities clearly on the project plan
Why is it prefer to initiate circuit breaker failure by "86" lockout relay not by "94" tripping relay ?!
Can Anyone suggest the Standards (IEC or IS) for selecting copper current density?
Hi everyone, I'm Lachuu, recently joined automation company as PLC Engineer. I have certain basic question, I request all big gurus and seniors to answer these question. Because this will be very helpful to me as well starters like me. How to design a control circuit (ex: pick & place - my current project) Yamaha robot PxYx series controller RCX222, using 6 cylinder double acting, plc keyence kv p16r 2 expansion unit for input and output each. How to select panel terminal mcb elcb powersupply. My main concern in some projects how to select dc power supply, mcb rcb(I came across dif bt b c d curves, but stil confusing, pls help me :-(. I would really appreciate all who are going respond to this question.
wht is embedded systems? what is new inthis field?
delta motor winding resistance I take normally single winding is 2.5, which value is came delta connection ie RY ?
Electrical 'C' license full abbreviation , and full form
"TRANSFORMER MODELING AND ANALYSIS" MEANS WHAT AND WHICH TOPICS U READ IN THIS
What descriptive information does the NEC require to be marked on all conductors?
what could be the RMS value and average value of a 4 phase sine wave?
if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.
What is vacuum circuit breaker.define with cause and where be use it device?
Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,
What are the different power system losses and how can it be eliminated?
Why the arms of delta in a delta-wye power transmission system are kept constant??
