Answer / k.p.sharma

The Earthing Value as per the standard for Raw
power and UPS Pit SHOULD BE LESS THAN 2 OHM and in
panel /DB N-E value SHOULD NOT BE MORE THAN 5 VOLT.

Answer / rathod manhar

For raw power and UPS pit the earth resistance value is
around 1 ohms and N-E value is 1-0.5 ohmsfor good earthing.

can u describe the method used for protection of transmission line.

0 Answers   IBM,

---

Alternating voltage and current is which type of quantities?

1 Answers  

---

what is the requirement of commutator in a universal motor?

3 Answers  

---

If genrator not build up voltage , How u can Manually Excite ?

2 Answers  

---

1KVA transformer of different frequencies of 50hz,100hz,500hz&1000hz. which one of these transformer has big size? Give reason

16 Answers   Ecil, Engineers India, MahaDiscom,

---

What is the basic difference between earthing, ground and neutral?

11 Answers   Balco, Cognizant,

---

what is the difference between MCB & MCCB

3 Answers  

---

What is the loss of transformer of 220kv/11kv, 63/80 MVA and 18.05% impedance

0 Answers  

---

In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.

0 Answers  

---

why it is necessary to maintain frequency constant in a power grid ?

1 Answers   NTPC,

---

why the emf of a cell more than the terminal voltage when the cell is delivering current?

4 Answers  

---

Explain what are inter-poles and why they are required in a dc machine.

0 Answers  

---