Answer / jim sreedharan

NGR is neutral ground resistance. 5-10 % of full load
current passes through NGRcduring system ombalance.
Restricted earth fault current passes through NGR till
automatic protection takes place. NGR absorbs the earth
pressure and protects the transformer windngs.

God Bless

Answer / karthi

GM, I have query that how the current flow comes from leakage fault point to NGR pit? For example my motor is located far away from transformer location and the cable got exposed and severe ground fault happens thus the huge current flows in it. In that case how NGR protects the system? Also I read that NGR allows one fault and the second instance only will trip and protect the circuit, I cant get that how it is.

Can some one clarify me, Thanks

@ Karthi  

Answer / md79

Mr. Venkatesh A.

I have a 347V, 5A continuous NGR.

How can I determine how many ohms of resistor should be
used?

Thank you

Answer / mahesh.s

NGR is Neutral Ground Resistance,This value is below one
Ohm better value

diff. between star, delta connection?

4 Answers  

---

What is the difference between a verilog task and a verilog function?

0 Answers  

---

Can we step up a 230V supply to 400V using a single phase transformer??

2 Answers  

---

why transformer not used to starter

1 Answers  

---

which is the slowest motor? and wt is speed ?

1 Answers  

---

what happend if we remove dc exciter from moving machine..: gg

4 Answers  

---

How much duration I can keep open the CT if it is under loading condition(100 Amp load)?

3 Answers   Infosys, NTPC, Suzlon,

---

Why dc Supply used in Control circuit.

12 Answers   HP,

---

what is the formula or method to calculate RESIDENTIAL,COMMERCIAL & INDUSTRIAL load power?????

3 Answers   RRB,

---

What is the bundle conductor?

0 Answers  

---

What is installed in PAC that is control the humidity

0 Answers   Sodexo,

---

why the excitation is necessary to produce the reactive power

2 Answers  

---