Answer / ramesharavind s

pole = 120*frequency/speed(Ns)

this is formula for calculate the pole for power generation

why we measure ouput of transformers in kva.

1 Answers  

---

I have carried out wiring for lighting in a shed in Industrial area which contains Metal halide lamps & have balanced in 3ph.Now when we put all the lines on in the daytime the current taken at 3phases at MCB comes to be equal i.e.28,29,28Amps respectively but in the night time i.e between 7p.m.to 11p.m. at the same MCb the current is 52,59,62Amp, though I have fit 63A MCB it is tripping in the above period.What may be the reason.? Note: This industry is located in industrial area where majority of steel ingot manufacturing plants are there. Whether this may be due to harmonic? what should I do to overcome above problem.pl suggest urgently.

4 Answers  

---

if voltage in transmission line more than current will be more or less,if less what about the Ohm's law

2 Answers  

---

Frequency of rotor emf in induction motor is around A same as stator frequency B 50% C 5 % or below D 30%

1 Answers   Bhel,

---

What is mean by hot and cold loop testing? What is the difference between them?

0 Answers  

---

How power factor of electric system improved?

6 Answers   Nalco,

---

what is the saturation point of crgo lamination.

0 Answers  

---

How to calculate flow of water delivered by pump when pressure & size of pipe line is given

0 Answers   Knight Frank,

---

How to setting the volume of RTCC panel AVR (11kv) controller

0 Answers   CNF Automotive India,

---

why field rhoestat is kept in minimum position while armature rheostat at maximun position?

3 Answers  

---

can we apply kirchhoff's laws to circuits containing non linear elements?

3 Answers   Metro,

---

what current is taken from a double wound 500kva transformer

4 Answers  

---