Answer / biren

In overhead line there is air around the bare conductor which is a insulation layer but the earth around the under ground cable is a good conductor. so there is more chance of insulation failure, hence to avoid the normal insulation failure more insulation is provided which increases the cost.

Answer / sk.azhar.m

An underground line is fill in the earth and when if the leakage current will flo in the erth the current rating will very high in the cable that is very dangerous for human and other and in the the overhead line the air is not good conductor of electricity while an underground line is more insulation than overhead line for this reason the insulation cost is more in underground system

I have installed capacitor bank at secondary transformer. cos phi is increase. but on load (far from transormer), it still poor. Can anybody explain it??

6 Answers  

---

wht is the difference between volatge and wattage ? how can it be converted ? (like 15w = 6v ) like tht... ? actually what tht means ?

3 Answers  

---

a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

0 Answers  

---

hi i wonder will the speed of a 50hz AC motor reduce if i supply it with 25hz?

4 Answers   Divis Laboratories,

---

what is cut out fuse?

1 Answers  

---

what is open star connection or open delta.

1 Answers   ACC, Jindal,

---

why transformer calling in VA rating

6 Answers  

---

Why is remote backup preferred to local backup?

0 Answers  

---

how synchronous generator can be used as synchronous condenser?

3 Answers   Monnet, Wipro,

---

how we decide the require size is this for a known current at fuu load?

0 Answers  

---

what is power and what is watts detailed description and formulas

2 Answers  

---

sir i am pradeep singh from electrical branch and i want to place in software industry(tcs)but i dont know much about programmig languages like c c++.so how can i get a placement in software industry?

1 Answers   TCS,

---