why do we need transformers?

Answer Posted / rahul

all the answers above are correct...

Step up, step down
protect the main connection
Variable transformer- to reduce the starting load.
Isolation transformer - to prevent the machines from getting damaged from spikes as transformers filter them.

all these answers must be answered simultaneously to describe the transformer completely... & i really dont know which is saying the answers above that of mine are wrong.. they are right but are partially answered

Is This Answer Correct ?    18 Yes 8 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is the resistance of the field winding of a d.c. Shunt generator kept low?

631


Explain the function and difference of Restricted earth fault, simple earth fault and sensitive earth fault with connection diagram.

2150


from generating station If 400v LT line length is 1000m how much voltage is drop and how do i calculate it? which cable will be use for this line?

1537


In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?

1755


what are factors to be consider to design a HT & LT motor?

1818






How to calculate the sag on transmission Lines.

2419


Is it true online ups having bypass mode if it is true then why we called ups because it is interrupting power when goes in bypass mode

1547


what is meant by directional earth fault and non directional earth fault? describe both.

1465


if field breaker of generator is closed prior to its rated speed on a power generating unit. what will be the effect on generator, unit transformer and starting transformer.

1290


wow to calculate the transformer rating(KVA)

1678


3phase motor can be used as a Prime mover for alternator.

1174


A cable with concentric PE conductor must be used with frequency converter circuits what does its means.?

1122


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

1225


Can you explain about TEE protection scheme?

1757


Why compensation is necessary in feedback control system?

776