Why DC current is not used in transformer?
Answer Posted / santosh jadhav
1) transformer works on the principle of Electromagnetic
Induction when Ac supply is fed to Xmer due to Alternating
nature it Induces EMF in the Secondary winding.
2) When Dc supply is fed to primary as frequency is 0 in DC
supply No Emf s induced in Secondary & total input power
loss takes place in Core only Core burnt out Finally.
| Is This Answer Correct ? | 25 Yes | 4 No |
Post New Answer View All Answers
What is called limb of a transformer?
for 750 kw LT load what will be the ht kva
how to test and calculat the head and discharge in borewell compressor
How to calculate the phase to phase clearness of HT /// LT bus bar?????
Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.
Dear sir, my knowledge about cable size determination is limited. Though I read examples I could not calculate the Cable size required for electric driven pump 40 KW, 380 Volt, 50 HZ, 50 meter from transformer and it is three phase star delta starting. Please help as there is no one in my surroundings to help.
draw vector diagram and +ve,zero sequence diagram of symmetrical three phase fault.
what is the current density of copper & alluminium.
What is an Air COmpressor
is it value of power factor is more than unit. whats effects in the source supply
Can you please explain creepage distance in detail, for a 6.6kV cable head what must the distance be and how do you determine it?
Why compensation is necessary in feedback control system?
How dia computation perfomed in cold rolling mills .
What are the types of windings according to the construction?
we use capister for power factor. when we use capaciter in dg circuit than defect dg. can we use capaciter bank for dg circuit