Answer / er. ankush miglani 9718151073

KVAR= KW(TAN(COS(-1)#e)- TAN(COS(-1)#d) )

#e= EXISTING P.F.
#d= DESIRED P.F.

Answer / shalini.b

capacitor bank value is calculated in KVAR
From Power Triangle,
KVAR = Sin(phi) * KVA

Desired Power factor = 0.96 (say)
cos(phi)=0.96
phi = cos(inv)0.96
phi= 36.86
Sin(phi)= 0.28

If the transformer rating is 1250 KVA (say)
KVAR = 0.28*1250
= 350

Answer / maen drawish

The proper calculation for cap. bank it depends on the
desired & initial/ existing cos-phi.

Answer / skumar

I don't know the correct formula. But in practical we
applying 30% of our full load(i.e transformer capacity).

What is disc insulator and it's application..?

2 Answers  

---

which types of tests are required after commissioning of 6.6 kva tranformer?

3 Answers   Reliance,

---

Explain RYB?

21 Answers  

---

Why double earthing is required ?

1 Answers  

---

what is meant by transformer oil temparature

3 Answers   Vijaya Bank,

---

what do you mean by PF correction. A motor is rated at 15 kw,415 volts, 0.7 pf and eff of 0.92. The powerfactor is improved to 0.98 by adding capacitors at the bus. calculate the current drawn by motor under full load condition before and after pf correction

5 Answers  

---

define electrical field?

6 Answers   L&T,

---

Why we use the D-curve MCBs in critical power distrubution.

4 Answers   Sodexo,

---

Why you are switching off arc protection mcb when you are taking shutdown for lv board.

0 Answers   KSEB, L&T, Siemens,

---

can I connect step down transformer(25KvA,240V Phase to phase)to output of online UPS(15KvA,440V PHASE TO PHASE) Load connect to TRANSFORMER is 13KvA,240V PHASE TO PHASE. please brief if it is wrong

1 Answers   DRJ ARDE,

---

Please tell me if you are electrical engineer,and you are appointed for the maintainance of Electrical Power plant,then which parts of the plant deal with you.Also tell how these parts/components work.

1 Answers  

---

Why is it preferred to use a wattmeter(s) to measure power in three phase systems rather than using a combination of other instruments e.g. voltmeters, ammeters etc?

2 Answers  

---