Answer / vitthal upare

In star speed of motor is very low with low amp.
and in delta motor running with its normal rated speed with
rated amp.
So generally for motor starting purpose star used and
afterthat its change over to delta

Answer / nithi

for a same power rating the current in delta connected load
is 1.732 times lesser than the star connected load (heat
loss is less) &also if one phase get opened the other two
phases will serve the load i.e.good stability.but in safety
point of view, star connected load is better than delta
load.because earthing can be done without the help of
earthing transformer.

Answer / vitthal upare

Dear Subhash
Yes speed of motor will remain same in star and delta both

Answer / subash

Mr.Vitthal upare there no relation between speed of motor
and star connection

The speed will be same in STAR or DELTA

SPEED IS RELATED TO NO OF POLES AND FREQUENCY RIGHT

1.what is surge 2.what is lightning 3.what is switching 4.difference between surge,lightning,switching used in power system 4.definition of surgearrestor,lightningarrestor 5.adv and disadv of surgearrestor,lightningarrestor 6.uses and purpose of surgearrestorand lightning arrestor 7.block dia of surge arrestor 8.blockdiagram of lightning arrestor 9.operation and working of surge arrestor and lightning arrestor 10.basic formula of surgearrestor and lightning arrestor 11.basic diagram of surge arrestor and lightning arrestor

1 Answers   Crompton Greaves, Framo, L&T,

---

in a dc motor we supply current only to the armature conductors,from where is the field winding gets excited then??

3 Answers   RRB, Siemens,

---

what is earthed and inearthed cable or system?

1 Answers   CCCL, L&T,

---

name 3 measuring instrument used in transformers

4 Answers  

---

what do w do when the output of generator is fluctuating?

0 Answers  

---

Initially motor starts with star connection ,after few timing changes to delta connection, why the motor should run continously in star connection,it gives high torque & low current?

3 Answers  

---

Procedure for conduting vector group test on power transformers.why it is conducted?

6 Answers   Grasim,

---

what is different between earthing and grounding for a electrical eqipment ?

2 Answers   BARC, Omega Maritime,

---

What is measurement?

0 Answers  

---

What is advantages of VSCF wind electrical system?

0 Answers  

---

how to measure the A.C flux .-instrument

8 Answers   NTPC,

---

Explain about how is it working Earth fault'relay and wahts the resistance value of earth bed

0 Answers  

---