Answer / naveenkumar

efficency=output/input*100
eg: your transfer full load current is 100A your consuming the 70A then
(70/100)*100=1/2*100=.7*100=70%.efficency.
life time of a transformer best 60% if u get 70% efficency t/f life time will reduce.if you going to 100 t/f is blusting

why there is a phase difference between line voltage & phase voltage ?

4 Answers  

---

why dc supply is not applied for step up or down in transformer

3 Answers  

---

At a family reunion were the following people: one grandfather, one grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one father-in-law, one mother-in-law, and one daughter-in-law. But not as many people attended as it sounds. How many were there ?

6 Answers   CTS,

---

wat is the advantage of increse in frequency?how the powersupply range decreses as the frequency increses?like in america,it uses 110 ac and 60 hz?

4 Answers  

---

can we use optical fibre to electrical power transmission ?

1 Answers  

---

wht is the purpose of the earth electrode other then earthing

1 Answers  

---

At what speed an electric car can run with 2 HP motor of weighing 400 kg?

0 Answers  

---

What is master trip relay? How does it work?

1 Answers  

---

What is Earth Fault and Over current Fault.

1 Answers  

---

what happen when we add mentos in cold drink?& why?

0 Answers  

---

Is it possible to interlock between ACB & MCCB?

2 Answers   Areva,

---

Why underground cables are used to connect transformers?In addition how are they again connected to lines after step up or step down?

1 Answers  

---