Answer / niti

Earth fault means "the fault that occurs when the current
carrying conductor or live part get connected or touched
with earth"

for example

In 3 core Ar cable if one core damaged or punchered due to
mechanical injures that core touched with Armour, the fault
current pass through Armour to earth via panel

Answer / c.venkatesan

1.insulation failure
2.cable damaged by any excavtion works
3.overloads
4.due to dust
5.any animals are enter into the panel
6.any loose objects near the power system

Answer / not given

this really don't help me sorry for yall lost yall suck at putting answers out there how is this going to help me with my research duhhhhh yall need to THINK!!!!!!!

Why two main buses and one transfer bus scheme not using for 400kV switchyard

5 Answers  

---

4.In which type of welding is a pool of molten metal used.....

3 Answers   ISRO, SSC, Vizag Steel,

---

This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

---

how to calculate the current carrying capacity of cable

2 Answers   Bhel,

---

WHAT IS THE MEANING OF 'UPF'&'LPF'.... HOW CAN WE DEFINE IT? WHAT IS THE VALUE/RANGE OF EARTH WIRE RESISTANCE USED PARTICULARLY IN HOME....

2 Answers  

---

how one can design armature winding bothh front and back connection

1 Answers  

---

How to calculate the size of cables (all minium/copper) for a particular load

1 Answers   BSL, Galaxy Power System,

---

why power not passes in plastic and rubber material

0 Answers   GPG,

---

Plugging is a phenomenon to= A braking the motor B to accelerate the motor C to run IM as generator D to start the motor

0 Answers  

---

what is the difference between high impedance & low impedance

1 Answers   L&T,

---

How can i get my certificate of competency as an electrical supervisor? I have complicated my B.Tech from Uttarakhand technical university this year (2012).

0 Answers   ONGC,

---

wht do u mean by load in circuit.wht dp u mean by inductive load

7 Answers   SGS,

---