Answer / swum

Line Current, Impedance and Power in Delta circuits are 3
times their values in star Circuits

Refer any basic electrical engg book like Theraja or so

Answer / swum

Line Current, Impedance and Power in Delta circuits are 3
times their values in Star circuits

Refer any basic electrical engg book like Theraja or so

Answer / kundan15273

in star connection line current=phase current
and in delta connection line current= 1.732* phase current.
In delt connection power = 1.732*1.732*VL*IL*COSphai
therefore 3 times current willbe more in delta connection.

how can we measure rotor current of a 3phase wound rotor induction motor connected to liquid resistance starter

1 Answers  

---

why the transformer has no starter

2 Answers   NTPC,

---

what is armature reaction?explain in simple words?and what is its infleunce on dc motor

16 Answers  

---

What is mean by diversity Fator?

7 Answers  

---

We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.

2 Answers   KPTCL,

---

How much current in 100 kva Transformer HT & LT side

1 Answers  

---

for selection of transformer we will considering 5 to 6 times of starting current of higher rating motor connected to secondary side. according to process wise we will start the motors gradually suppose if we will start 15 to 20 motors at a time wat will happen?

1 Answers  

---

what happens if we give 1-ph supply for 3-ph Bridge rectifier...??

2 Answers   Sanelec,

---

what do you mean by partial discharge in cable

1 Answers  

---

why cannot we use a freuency more than 400hz is used in aircrafts?

1 Answers  

---

What is the most accurate way of testing ELCB?ELCB is better than RCD?

0 Answers   GECO,

---

What is Horan Gap Fuse? Where it is used?

1 Answers  

---