Answer / kj

This is done by taking a wire from each end of each winding
to the starter. When starting one end of each winding is
connected to a separate phase and the other ends are
connected together to form a star point.
When changing to delat the ends with the starpoint are
switched open and then switched to a phase each.
Having the correct phases on each end of the windings is
important otherwise the direction of rotation can be
reversed when changing to from star to delta.

in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

0 Answers  

---

why square root 2 is multiplied with line voltage in selection of LA ie 11/sqrtroot3=6.35 kv and it is multiplied with sqrt2 ie 6.35 KV*sqrt2=8.9 kv we will select 9kv.my question is why we are multiplying with sqrt 2?

1 Answers   KSPL,

---

Transformer diagram mention each parts ?

0 Answers  

---

what is the distance between two overhead lines

1 Answers   Aurobindo,

---

i Have 1000kva 11/.4 kv voltemp make t/f Its a 2 year old. i wants to known how much iron losses & copper loses during no load condition.

2 Answers  

---

TYPES OF TEMPERING OF ENERGY METER

1 Answers  

---

what you mean by vector group of a 3 ph transformer

1 Answers  

---

campared to ac, in dc corona loss is

4 Answers   DRDO,

---

what is diff. b/w of earth & neutral?. why we are separately using ?

3 Answers  

---

what is stray loss in transformer?

19 Answers   Vijai Electricals,

---

What Should be the rating of transformer used in 33KV substation?

3 Answers  

---

What is the typical power circuit configuration of a VVVF Drive ?

1 Answers  

---