Answer / shailesh tankni

in generators or alternators dc supply is provided to the
field along with the mechanical external force for rotating
the field winding. in this way stationary field is used to
produce rotating field which produces rotating flux and
excites the armature winding. so it works on the principle
of faraday's law of induction and provides excitation in the
armature winding.
but in transformer there is no moving part and hence if dc
supply is applied to it there will be no change in flux and
no excitation is produced in secondary winding.

Answer / subash

Dear brother there is lot of difference between a
transformer and a generator
Generator which generates the supply it converts mechinical
energy into electrical energy,it produces power.

where as in transformer it transfers the generated power
from one circuit to another circuit with economically

Answer / dileep

actually emf s are two types 1).statically induced emf 2).dynamically induced emf .we r giving dc suply while we are genarating dynamically induced emf's because emf is induced in the conductors wen there is some relative motion between conductor & field .if we r giving ac supply to rotating machines relative motion is zero that s why we r giving dc supply to rotating ma chines & this emf is due to self inductance .. but in case of transformers emf is due to mutual inductance

Answer / subash

To generate the voltage in generator extitation voltatge is
required to create magnitic flux ,

but in transformer the winding is connected to supply mains
the winding itself produces flux

in dc series motor if field wdg is shorted then

0 Answers  

---

Hi,Any one has idea regarding the KPTCL Recuirtments for AE'e & JE's for the year of 2009-10???Kindly help in regards..

6 Answers  

---

what is main purpose of ignator in halogen lamps.how to identify the failer of ignator in circuit

0 Answers  

---

what questions are asked in the interview for the post of an electrical maintenance engineer in FMCG companies?

0 Answers  

---

what will happen if the bus PT fuses are accidently removed from the circuit in 6.6kV feeder?

1 Answers  

---

---

what do you mean by the "bay" in a switchyard? how to determine exact number of bays in a substation?

8 Answers   Essar, L&T,

---

why autotransformers are not safe for supplying low voltage from a high voltage source?

5 Answers  

---

Advantages of using bundled conductors ?

3 Answers  

---

When we give supply to a transformer 11 kv and we get 415v from it, so when we give supply to same transformer 415v on ht side what we get? and When we gives supply to any transformer to L.T. side 415v or 220v What supply is on H.T. side?

2 Answers   Ashoka Electricals,

---

what will happen if i connect the buchholz relay in reverse direction.

1 Answers   MAN,

---

how Local Breaker Backup relay working?

1 Answers  

---

How to design CT for connected with Transformer OLTC operation? normally CT output design for 1A/5A range but during OLTC Tap position changing time how to function the CT?

1 Answers   HEG,

---