Answer / balamurugan

online ups no change over time (0 ms)from EB supply to Battery supply. offline ups some mls time to change over from EB supply to battery supply (more or less 3 ms )

prove that power consumed in 3 phase delta system is 3 times as compared to 3 phase star system

0 Answers  

---

What should be the amps for a MV fuses for transformer 630kVA 20(10)/0.4 kV

0 Answers  

---

why does rotor rotets?

0 Answers   IBM,

---

what is the EMF

2 Answers  

---

how dg's working of 1000kva.

1 Answers  

---

electrical ques

0 Answers  

---

why the supply power frequency is 50hz in india? where as it is 60hz in US?

4 Answers  

---

need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

0 Answers  

---

Name the earthings?

3 Answers   HSL,

---

How do you calculate of power factor, if it is lagging or leading for unit(1).

4 Answers  

---

what is the difference between surge arrestor and surge supressor

1 Answers  

---

basic differance between electrical and electronic.

1 Answers   Jindal,

---