Answer Posted / ashok bhatnagar
The current drawn by a transformer depends on the load
connected in the secondary. If the load cneected is a
resistive load the majority of current drawn is in pahse
with the supply voltage and transformer operates at near
unity power factor. In this case transformer supplies kw
nearly equal to its kva input. However if a inductive load
like motor is connected it draws lagging current and
operates at lower power factor. In this case trasformer
supplies lower kw as compared the kva drawn. Thus
powerfactor of a trasnformer depends on type of load
connected and hence it can not have defined kw rating. That
is why transformers are rated in KVA and not KW
| Is This Answer Correct ? | 10 Yes | 1 No |
Post New Answer View All Answers
Where is the best place to mount distribution panel in a house.
In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.
What will be advantage if we put some load in neutral of grounded star transformer & loadshortcircuit current,rated current of cable & MCB with example?
What is Auto Mains Failure Panel & Auto Synchronizing Panel
i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle
what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end
we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan
i ha done my 10th with 71% ,ITI with 81% 11th with 75% 12th 43% apprentiship with 71% in SAT i secure 1390 ,TOEFL 27 i was refused four times and in all me interview visa officar told that i am not Qualify for study in USA but i completed my 12th yes i got low persentage in my 12th but i seen to much student they already got visa with them 3 or 4 backlocs so why they are refused me ?
what is the difference b/w ground & virtual ground?
Name two types of electrical analogous for mechanical system.
What is a single phase autotransformer?
what is meant by LCR meter? where its useful ?
what is negative and zero impedance in 3 phase induction motor ??
What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???
What is the difference in calculating size of AC cables compared to calculating size of DC Cables? Usually DC Cables are larger than AC Cables although they have the same ampacity. Why is it?
