Answer / saurabh

power factor helps us to know ,what part of the input power
is being effectively used

Answer / nagendra murthy m

power factor is the ratio of the real power flowing to load
to the apparent power in the circuit. it is a dimensionless
number between 0 and 1.The significance of power factor lies
in the fact that utility companies supply customers with
volt-amperes, but bill them for watts. Power factors below
1.0 require a utility to generate more than the minimum
volt-amperes necessary to supply the real power (watts).
This increases generation and transmission costs. For
example, if the load power factor were as low as 0.7, the
apparent power would be 1.4 times the real power used by the
load. Line current in the circuit would also be 1.4 times
the current required at 1.0 power factor, so the losses in
the circuit would be doubled. so this must be minimized
using suitable methods.

Answer / malik

power fector is cosign angle between voltage & current.

PF=kw/kva = cos
it hould be 1 or unity
eg if input is 230 & out put is 230 then pf=1

Answer / amit

you can purchase power factor from your nearest relinace
fresh outlet.

its pf season go they will give u 40% discount.

Explain the method to keep noises low in a control system?

0 Answers   HPCL,

---

how brushless dc motor is operating ?

4 Answers  

---

what is the principle of operation of domestic fan?? what is the role of capacitor in it??

5 Answers  

---

what is EBXl (electron beam cross linked ) cable ?

1 Answers   Polycab,

---

List few applications of d.c series motor?

0 Answers  

---

---

dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?

1 Answers  

---

what is the function of garing capacitir in SF6 circuit braker?

1 Answers  

---

which type of capacitor store high amount of energy for long time ? ( polarized or unpolarized )

1 Answers  

---

. The string effcy in AC sys is 80% Then for same power, the string effcy in dc sys is a) less than 80% b) 80% c) more than 80% d) zero

1 Answers   Engineers India Limited,

---

Explain working of PIU(Power Interface Unit) in Telecommunication,

7 Answers   ACME, ATC, Bharti, HCL, INDUS, Pace Pharmaceuticals,

---

The coils having selfinductancs 10mh and15mh,effective inductance 40mh when connected in series aiding. what will be the equivalent inductance if we connect them in series opposing?

1 Answers   BSNL,

---

What may be happen if neutral and earth is shorted in a substation

3 Answers   Bureau Veritas,

---