Answer / all interview

earth fault means carry fault current,earth leakage means
carry leakage current

why maintenance batteries used in DG sets not in MAintenance free Batteries.

4 Answers  

---

sir i ve applied for hindustan petroleum and power grid india ltd..and the exams on feb 22.can you pls send model papers and tell how to prepare for those.i need to get into any of these for sure.....

0 Answers  

---

what is the basic principle of TV camera?

0 Answers   BZU,

---

Generally at what power factor the electronic equipments like computer, TV, EPABX etc.,operates. Please tell me.

1 Answers   HAL,

---

Why should not we run the IM in low voltage, if runs means what will happen?(for example instead of 400V we give 250V supply)

2 Answers  

---

what is the difference between vector scale and vector diagram?

1 Answers  

---

what is advantage of providing taping on HT side?

4 Answers  

---

Why do we have 110V, 230V, 415V etc. in electrical transmissions? Why not 100V, 200V,400V?

4 Answers  

---

how to determine capacitor bank capacity of one plant..

2 Answers   Dalkia, SPDC,

---

What differance between Circuit brekar and Isolater?

14 Answers   TATA,

---

I have connected 04nos. earthings to a transformer through 04nos. earthing pits seperately. 02nos. earthings are connected to T/F body, and 02nos. earthings are connected to T/F neutral.T/F capacity is 2000KVA, 11KV/415V. But after completing of 02 years successful operation ,we are facing following problems- 1. CT/PT occured blast one time 2. HT cable box occured blast two times 3. One body earthing strip and one neutral earthing strip of transformer are overlapping at some places. Whenever these two strips are pressed at overlapped points, they made spark. What is the reason of spark? Please explain the reason & rectification of above problems

5 Answers  

---

How to select the cable size for the given load ?Pls explain the Formulae

3 Answers  

---