Answer / iamdon

AC generator(alternator) can be designed for higher voltage
as compared to DC generator for following reasons.

Large rated alternators are of rotating field
type.i.e,armature is placed on stator which is stationary
and DC field winding is placed on rotor which is moving at
synchronous speed at steady state.

1)Insulation required for armature, is not subjected to any
mechanical stresss because of no rotation of armature.So
insulation for higher voltage is possible.
2)Armature is placed on stator which is outside.There are
more spaces available on armature.So it is easier to
provide more insulation for higher voltage withstanding
capabilty.

DC generator are of rotating armature type due to which above
mentoined beauty is less effective.So insulation for higher
voltage is not easier.

Author:arbelectbit@yahoo.com

ROC converges if pole and zero lies inside a) origin b) z=1 c) pole d) zero ? Explanation please? if ROC does not converges then?

0 Answers   CCP,

---

what is kondo syatem in eletrical traction

0 Answers   APCPDCL,

---

hi frienda We have 750kva cater pillet dg set we are fasing one diffrent proublam in dg we are start dg set after one mint applying load around 450a load but dg was run 3 Or 4 mints after 3 mints dg was shuding down automatic how to face this proublam pls tel any budy

1 Answers  

---

what is advantage in open delta connection?

20 Answers  

---

why transformer not used to starter

1 Answers  

---

plese send me the oces/dgfs sylabus and previous year question pattern of electrical engg.?

0 Answers  

---

What is differential relay? How it operates?

1 Answers  

---

What will happen if 60 Hz rated transformer is connected to the supply of 50 Hz say 415 V (3-phase) step up to 3.3 kV...?? ?

2 Answers   Essar,

---

1)What will be full load current for 1000kva 3 phase generator. 2)What will be full load current for 20Kva 1 phase inverter.

5 Answers  

---

How to check AC & DC Choke

1 Answers  

---

Why NGR is provided in sub station?

4 Answers   MMS,

---

to calculate voltage drop of cable which current we consider that means full load current or panel size?

2 Answers  

---