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

redundant connection in contactor?

0 Answers   Emerson,

---

plz tell me in detail about c.t. and p.t. ?

3 Answers   Reliance, SCL,

---

We have three 33kv substations. All of them energised by same source.When i am checking the phase sequence between one substation to other substation (like R Phase to R Phase) by multimeter i am getting some voltage.Near to LT panels UPS panels are there. Can u explain whether any possible to happen like that. In Phase SEquencemeter is showing correctly in both substations. How is it happen. Explain me.Explain me communication signal will produce Phase difference on this case.

3 Answers  

---

WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).

1 Answers  

---

Why is transformer a machine

1 Answers   Grasim,

---

When we giving the 3 phase supply to ups system how to coming netural?

0 Answers   Juniper Networks, Tata Motors,

---

If the Supply voltage is increased by n times, the cross section of conducter will [increase/decrease] by ________ times ?

4 Answers  

---

how is working the auto transformer?

1 Answers  

---

how many types erthig

6 Answers  

---

Do you know the faults occurs generally in motors and how to rectify them?

4 Answers  

---

What is difference between PLC and SCADA

13 Answers   Uflex, Vimal Fire Controls,

---

What can a fresh(without experience) electrical engineer contribute to NTPC( Or any PSU company) growth?

3 Answers   NTPC,

---