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.

What is the effect of using an underrated size cable to supply electrical power to a 3 phase ac electrical motor? What is the effect of using an overrated size cable for the same motor?

1 Answers  

---

Electricity sometimes can be dangers , sometime got shoked form it . It is because of volatge or Current

6 Answers   Kirloskar,

---

what are the protection for DG set and why?

2 Answers  

---

Which is is best option for 33 kv line incomer.I am Desinging the panel for new projects and i would like to get Your opinion on this Vcb or sf6. Please help me with your replies. Thanks D p singh

6 Answers  

---

If I want to lift the water at a height 50m from ground level through two inch(diameter) metal pipe then what is the capacity of motor pump is required? is it possible in single phase supply or not?

0 Answers  

---

Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.

0 Answers   Engineers India Limited,

---

What is sensitivity of a measurement?

0 Answers  

---

Generally in AC we consider voltage, frequency and phase sequence for parallel operation ... Can we parallel two DC battery chargers? If yes, then what precaution to be taken when we parallel two DC power?

5 Answers   Reliance,

---

what is the difference SCR & TRIAC?

13 Answers   TCS,

---

How to maintain ac plant?

0 Answers   HCL,

---

In dc ckt. 24v or 110v, which one is more efficient and why?

0 Answers  

---

How to know th details about an electrical Drawing ? Please mention the easy method.

0 Answers   Siemens,

---