Interested to Buy Any Domain ? << Click Here >> for more details...
why Transformers power mentioned in KVA?. and why Generators
and Motors power mentioned in KW?.
- 10 Answers
- 14517 Views
- I also Faced
- E-Mail Answers
Answer Posted / nithi
we can design the transformer for some rated voltage &
rated current ,power factor depends on the load.so,we
cannot predict the p.f. while designing the transformer.
But in the case of generator ,it has to supply real
power (depends on the capacity of the prime mover)& some
amount of reactive power to the system (depends on the
rating of exciter).that's why generators are supplied with
the name plate details including p.f.,kva rating & kw
rating.
in case of motor,it has to take some hp(kw) load
(real power) ,for that it uses some amount of power for
producing the magnetic field (magnetizing power--reactive
power).so,during the design itself we have idea about how
much of load the motor should take (hp load).This is the
reason why the motor is rated in kw,p.f..
| Is This Answer Correct ? | 11 Yes | 0 No |
Post New Answer View All Answers
how will calculate the safe starting current of 3-phase squirrel cage induction motor?
Which Class insulation is prefered for the sandwich Busducts ? Why?
why core is useful for a transformer ?and also in its operation ?
Define sensitivity?
WHY DO VOLTAGE TRANSFORMERS FAIL DURING EARTH FAULT IN THE DELTA CONNECTED 6.6KV ELECTRICAL SYSTEM
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)
Define unilateral circuit?
How to calculate loses in transformer of 160 KVA ?
how we can find of current direction(supply comming/out going direction) when a transmission line passing through sides.
any one please tell taht what type questions will be asked in BHEL interview, i am having interview on 24th Dec, please send this to mail pradeepsistam@yahoo.co.in
how to caculate cable size for diff types of loads? if anyone know the calculating procedure please tell me
in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer
at which voltage level arcing ground is occurs ??????????
Wt is the function of reactive power? How it generates & consume though resultant is zero?
