why transformer rating is expressed in kva.
Answer Posted / mrithun
The power factor of transformer is unity.
Since KW=KVA*cos(phi)
KW=KVA*1 (in case of transformer)
KW=KVA
So transformer is rated in KVA and not in KW.
| Is This Answer Correct ? | 3 Yes | 11 No |
Post New Answer View All Answers
Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core
Tell me in detail about c.t. And p.t. ?
i need project topics along with circuit diagram in the electrical and electronics engg and also some websites regarding projets.
State the other types of Air Conditioners?
Types of test in Switchgears, MCC, NGR and DB's how it should be procced. Can anyone give me the details here or email me to pasuvaraj.k@gmail.com
sir, i'm preparing for hpcl exam officer trainee pls tell me how the exam ques paper pls pls
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.
mostly the questions were from machines... d.c. machines, transformer, synchronous and induction all theory paper........ few from power system... but the level of paper was easy.....
What is clock position of Transformer?what are the clock positions are there?and what is different of them?
What are the effects of adding a zero to a system?
ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]
What do you understand by oldham's coupling ?
PAC and simple Ac different
how to operate and maintenance of 1500 kva diesel generator set
HOW MANY TYPES OF FUSE?