Answer / gunasekhar

the resistance offered by earth to absorb the high voltages and body shocks of electrical equipment. it ranges from 0.5-5 ohms.

Answer / guest

Ra+Rb+Rc=R
Ra=Length/ depth of the ground electrode•Electrode material
- Solid Copper, Stainless steel (High conductivity,
highcorrosion resistance but low strength & high cost)-
Copper clad steel (high strength, high corrosion
resistanceand low cost)
• The diameter of the rod
- Has little effect- Resistance would only decrease by 10%
by double thediameter
(
R
B
) - The contact resistance of the surrounding earthto the
electrode is negligible.(
R
C
)- The resistance of the surrounding body of eartharound the
ground electrode
- depends on soil conditions such as soil resistivity
4

Answer / vinoth

the earth resistance should be less than one

Answer / mohan.s

earth resistance is 2 ohm

a 3 phase motor was running with delta connected, suddenly one phase winding got burnt off, what will be the effect ?

8 Answers   Bhel, RRB, SR,

---

What Is Connection APFC Panel In Compony.

0 Answers  

---

draw singleline diagram of star to delta and dol starters

0 Answers   JCP,

---

how to reduce the power consumption in office ?

6 Answers  

---

In case of delta/delta transformer if the one phase is blown out then what will be secondary line voltage ?

4 Answers  

---

current and voltage equations for a star connected load fed from a delta connected load.

1 Answers  

---

what is the difference between star and delta connection ? when we use each one ?what is the best ?

14 Answers   Amara Raja, Daikin,

---

WORKING PRINCIPAL OF MCB

5 Answers   TATA,

---

How is The split core current transformer working ?

1 Answers   Honeywell, NCC,

---

how the characterstics of control valve being done

0 Answers  

---

RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV is ok ,but haw to calculate the KA rating?

0 Answers  

---

What is polarisation index value?.(pi value) Simple & brief definition of polarisation index?..

7 Answers  

---