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

WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?

0 Answers  

---

IN OLTC we observed "OUT OF STEP" Alarm, we have two different transformer, when both are in parallel this type of alarm observed. what's the meaning of this alarm and why it occurs???

3 Answers  

---

Why is it that bus reactors are not accompanied by a neutral grounding reactor whereas a line shunt reactor is? PGCIL does so.

2 Answers  

---

How to calculate the sag of OPGW during stringing???

0 Answers  

---

why is fan rotating slow speed, what is the problem?

4 Answers  

---

what is the first step of dg shycroning ?

2 Answers   ABB,

---

how we calculate the knee point of a protection and metering CT and what is the testing procedure.

1 Answers   CS,

---

i've iocl interview.. if you know the interview process please give me information..

0 Answers  

---

What is the safety protection? Name the protections of Transformer?

1 Answers   HSL,

---

Why we use 2core cable for Dc motor.Can I use 3core?

5 Answers   JK Paper, Maharaja Whiteline,

---

what is the current law ?

4 Answers   Aster, TCS,

---

What is the working mechanism of OLTC in Power Transformers????

0 Answers   KSEB,

---