Answer / k.prakashchandra

When the ups voltage = battery voltage,Number of batteries
required = desired back up hours x load /V x AH of each battery

Difference between transmission line and cable?when ever a large water channel has to crossed it is easier to use cable then transmission line why?

1 Answers  

---

1.what is surge used in power system 2.what is switching used in power system 3.what is lightning used in power system

1 Answers   Areva,

---

my bachelors was done with EEE now i got admit in NU with CS as course. how to answer this qns 1) why u choose cs? 2) why u changed from eee to cs

0 Answers  

---

why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?

0 Answers  

---

If we say that an cable of size 3.5X 50 mm sq. can take current upto 140 amps,is it the current of single core of the cable or of all the cores jointly.

3 Answers  

---

GIVE CONDITION FOR MAX EFFICIENCY OF 3-PH TRANSFORMER AND D.C MOTOR

2 Answers   BARC,

---

what is the difference between ac and dc hipo test of cable?

2 Answers  

---

What is x/r ratio?

1 Answers  

---

Wat wil happen if Transformer is operated at 100 HZ Frequency?

8 Answers  

---

what is the principal of transformer?

2 Answers  

---

What is the formula for calculating impedance of transformers connected parallel at fault level 50KA?

0 Answers  

---

WHAT WILL BE THE SPEED OF MOTOR IF NO.OF POLES ON STATOR ARE NOT EQUAL TO NO. OF POLES ON ROTOR.???

4 Answers  

---