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

WHAT WILL HAPPEN IF INPUT SUPPLY OF RCBO IS CONNECTED TO OUTPUT SIDE

2 Answers   ABG Shipyard,

---

Why pmg used in electrical generators for excitation.is there any other method without pmg ?

1 Answers  

---

What do you mean by ACB and VCB?

3 Answers   L&T,

---

State the types of distortions in amplifier?

0 Answers  

---

i want to trigger ATS (Mains +Generator )from external system could any body help me in this regard ?? is it posible if yes please tell me how?

1 Answers  

---

how many BUSBAR is in electrical system?

3 Answers  

---

what is Fan Control Cubicle

0 Answers  

---

Why Transformer does not work in DC ?

5 Answers  

---

wht do u mean by constant flux linkage theorem ?

3 Answers  

---

which gas is cost wise high?

1 Answers  

---

why power dissipation is due to low frequency?

1 Answers  

---

Why PS class CT is always preferred for Differential protection?

0 Answers  

---