Answer / muzamil

if voltage regulator is single phage..in think its out put
I=kva*1000/230=65.21 amps...in full load,
if regulator 3 phage...I= kva*1000/415*1.732*pf*eff
=15*1000/415*1.732*.85*.85
=28 Amps.

Answer / rajkumar

we should convert that kva to kw,

Power (KW) =KVA*pf
           =15*0.8
     P  KW =12.
 then,
      P=1.732*V*I*COS*EFF
       
we need current,

      I=  P/1.732*V*COS*EFF
       =  12/1.732*415*0.8*80%
       =  17.7 A

Answer / deepanshu tiwari

for even 3-phase you don't divide "KVA" by p.f , so the current for 3 phase will be :
i= KVA/(1.713*line voltage)
i = (15 * 1000) / (1.713*line voltage(415V))
  = 21.10 A

how the works electronic energy meter?

0 Answers   Bhel,

---

HOW TO CALCULATE CAPACITOR BANK OR HARMONIC FILTER CALCULATION

0 Answers   ECCI, EFS,

---

Why armour HT XLPE power cable required to Earth?

1 Answers  

---

in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.

1 Answers  

---

12.5 tons a/c is their how much kva generator can recommend to the customer.

0 Answers  

---

---

Ns=120f/p. what is 120?

10 Answers   IAR, L&T, Ramada, Toshiba,

---

Which phase is prefered for connecting 1phase vt used for synchronism in an OHL? why?

1 Answers   Siemens,

---

What happens if there is no nuetral in the power system?

5 Answers  

---

Brief working principle of fluorcent tubelight,function of starter & choke.

3 Answers   Havells,

---

what are factors to be consider to design a HT & LT motor?

1 Answers  

---

What is the difference between phase, neutral wire and earth cable. if neutral is connected to ground, y we need earthing cable? what difference in hot and cold wire? do neutral wire carry current?

1 Answers  

---

explain the existence of reactive power in electrical engg?when it generates?

1 Answers  

---