Answer / bharath kumar

TRANSFORMERS WORKS ON THE PRINCIPLE OF MUTUAL INDUCTION
WHICH IS A PURELY AC PHENOMENON,HENCE WORKS ONLY FOR AC
SUPPLY NOT FOR DC

Answer / wareagle

Is there a question. Transformers do not use a DC supply.

Answer / kj

Induction requires a conductor to move through a magnetic
field.

In a transformer the conductor is stationary and the
magnetic field is moved by the rise and fall of voltage
from the sine wave. This requires a change in voltage. With
DC the only change would be when it is turned on and turned
off. So pure DC will not work with a transformer.

The second thing is that with AC there will be a winding
resistance and an impedence as well to limit the current
flow. With DC there will only be winding resistance. This
could cause the windings to over heat if the same voltage
is applied.

Answer / avi2neha

There will be dead short circuit. due to dead short circuit transformer will get burn due to over heating of transformer winding.

What is a transductor ?

2 Answers  

---

what are check points to be checked while charging switchyard?(CT,PT,BREAKER,POWER TRANSFORMER)

1 Answers  

---

How DC earth leakage currents can be reduced ?

0 Answers  

---

how we can check that any motor is faulty may be single phase or three phase?

2 Answers   MAHINDRA,

---

which site/city in India has all three(thremal,Hydal and Nuclear)power generaton facilities?

2 Answers  

---

How Self works in DG set

0 Answers  

---

How to convert resistance value at 20 degree to 90 degree?

2 Answers  

---

1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

0 Answers   TATA,

---

plz explain the auot-reclosing circuit in electrical engineeing

0 Answers   BMC, KFC,

---

what is (+) and (-) in generator field detector stand for?

0 Answers  

---

difference between crane drive and line drive.

0 Answers  

---

How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

0 Answers   Reliance,

---