why transformer impedance measure in % (percentage)

4 Answers   Hindalco,

---

importance of reactive power management

0 Answers  

---

Suppose a 3 phase, 2 pole, 440V induction motor is driving a flywheel of 600mm diameter, 150kg mass. By using v-belt and pulley, the speed is increased to 4500 RPM. What will be the effect on motor current?

0 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  

---

State nyquist stability criterion.

0 Answers  

---

What is the minimum load that you can keep in a 3 Phase 40 KVA Diesel Generator? Is it neccessary to load all the 3 phases? Can a phase be left without load?

2 Answers   DRDO,

---

what is the ATS .And how it works.

0 Answers  

---

If 3-Ph motor of same rating connected in Delta & Star for same load one by one then which connection take more current in running (not in starting)for full load.(eg 8.5 KW,3-Ph 400 V)

1 Answers   GE,

---

what is the formula to find Amp. for an 3 phase moter both if H.P. or if kW is known?

5 Answers   Uttam,

---

What is a LBB protection and why it is used?

2 Answers   Gridco,

---

you have a 2 tonne ac that operates for 2 hrs daily what will be you monthly bill (this is complete question asked nothing else was given)?

1 Answers  

---

why ground cannot be used as neutral as ground also provides close path for current flowing ?

3 Answers  

---