Answer / umesh

Transmission lines are rated in MVA they have there current limits also but the voltage which predominates in determining the heights,gap between wires etc. so ultimately we give ratings in KV.

Answer / kesavan.03

In hv line, voltage level is high

some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?

0 Answers  

---

1)Why electric shock is feel ?? n in a Electric Train why we didnt feel that ? 2)What is the reason for transformer Noise ?? 3)What is relation b/w Transmission Lines & Communication Lines ? 4)Which material is used for making Transformer oil & How u measure its dielectric strength & Name the test ?

14 Answers   NTPC, Tata Power,

---

Why is ignitor used in sodium vapour lamp

1 Answers  

---

The power supplied to a 50mH inductor from a 120V, 60Hz source will be

0 Answers  

---

How can we get a Neutral from a three phase suply? If we meet all three phases at a point to take neutral then why dont thay get sparked?

1 Answers  

---

why use -48 volt DC power in telecom?

3 Answers  

---

Why the resistance grounding (NGR) is better than Solid grounding?

5 Answers  

---

Explain why machinery used on a.c supply is usually rated in KVA instead of KW?

10 Answers   EEE, Mtandt,

---

What is the difference between alternator and generator?

0 Answers   IOCL,

---

why all transformer colour is same?

3 Answers   OPTCL,

---

why in India it is maintained for exactly 50HZ frequency, why it is not that 49Hz,why it is so?

2 Answers  

---

Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

0 Answers   Accenture,

---