Answer / mehul g. c.

power facter - it is the sine angle between voltage vecter
and current vecter.

suppose you have 1.5 kw watt motor running on 230 volts and
power facter of your motor is .65 than your current requirement

i =p/volts*power facter
i =1500/230*0.8
i =8.15 amp.

and if you will improve power facter of your motor up to
0.85 than current requirement is

i=p/volts*power facter
i=1500/230*0.85
i=7.67 amp.

as you can see current taken by your motor is less if you
will improve your power facter.

advantages in big inductive machine & load.
1) current is less so losses should be less.
2) less current decrease your cable size & cost
3) voltage regulation should be good.
4) rating of switch gear will less.
and finally you will get some advantages from government if
you have big factory.

Answer / dhivyabharathi

Hai Mehul, Power factor is the cosine of angle between
voltage and current. u have given sine of angle...

Answer / ramesh

Generally power Factor are defined as the ratio between
Realpower(KW)/KVA (apprent power)

For ex- 8/10=.8
For kw= kva *.8
63*0.8=50.40kw

If power factor increses to .9 then
63*0.9=56.70
so the value kw increses if power factor increses
which indicates low current conjunction

Answer / ramya

hai mehul how we can improve power factor from 0.8 to 0.85
or 0.9 & its either lag or lead ?please clear me thank you

Answer / mehul g. c.

hai ramya.

there is a lot of way to increase power facter of your
machine or factory.

just read the book of b. l. thareja.

UG cable sizes were specified in sqmm. But practically its not coming to mesure. What's the reason for that? And how they specify the size of the cable?

0 Answers  

---

In a 3 phase induction motor(without connecting supply) if we rotate its rotor by hand and check resistance of stator winding at motor terminal box its resistance varies why ??

3 Answers   Jindal,

---

what is main purpose of ignator in halogen lamps.how to identify the failer of ignator in circuit

0 Answers  

---

i have 2 motor of same rating. on no load condition one motor take 1.6A but other motor is taking 4.8A. what is the reason of this. please explain with proof.

8 Answers   Ambuja, UltraTech,

---

how can i improve the power factor in domestic (230v)

0 Answers   Epcos,

---

---

How does HT work & Voltage required?

0 Answers   Adhunik,

---

I have done my m.tech in electrical engg discipline. Can any one please suggest me how should I prepare for getting into phd in iit or nit.How should I prepare for getting into lecturership

0 Answers  

---

why neutral and earth should not be connected on 3 phase 440v/50c/s supply at consumer side. where as on 25kv/ac/50c/s railway traction substation neutral and earth will be connected and track at substation. and track will act as neutral and earth. Reasons for this is needed urgently

4 Answers  

---

what happens if generator is running leading power facotor?

9 Answers   century,

---

why the neutral point is zero in star connection?

4 Answers  

---

how the synchronizing is obtained at bus couplers in grid substation? (because there we cannot change the frequency in one of transmission lines like in generator synchronization)

0 Answers  

---

Where can i get practical knowledge of solar system?

0 Answers  

---