In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)

0 Answers  

---

how percentage impedence effect on the size of the power transformer?

2 Answers   Bhel,

---

if we supply DC power to AC transformer then what its result?

15 Answers  

---

A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.

0 Answers  

---

What is the meaning of CT 40/5, 100/5 or in HT lines 100/1 ????????

3 Answers   Amex,

---

What is the difference between PT for metering and PT for protection ?

3 Answers   Dewan Cement,

---

what is dedicated earthing

2 Answers   Apollo Power, Student,

---

What is the efficiency during maximum power transfer?

0 Answers  

---

why the earth terminal in three pin top is longer than rest of the two terminal and of bigger size?

6 Answers   BARC, MAHINDRA,

---

In case you don't have coal and salt for earthing, how can you achieve good temporary earthing?

1 Answers   Focus Energy, NHPC, ONGC,

---

in communication what is the role of elelctrical engineer?

3 Answers   Quippo, Reliance,

---

in 1-phase 230v,how in 3-phase 440v. in each phase in between 230v.

0 Answers  

---