Answer / ravi

The name signifies the meaning that the Power is derated by
a factor. Real power is readuced by that factor, as the
reactive component which is in perpendicular to real power
is acting.

It can be improved by reducing the reactive component viz.
adding capacitors in the circuit.

Capacitive load leads the real power by 90degree and
inductive load lags the real power by 90degrees. Generally
electrical equipments are predominently inductive and hence
to compensate capacitors are added in the circuit, their by
improving the power factor.

Answer / raghunandan

Power factor is the cosine of the angle by voltage and load
current differ.
For example if there is a load of 1KW and the power factor
is 0.8 then the actual power utilized is 800 watts.
since all household equipments like
fans,grinder,refrigerator,washing machine etc. have motors
which are inductive loads this results in low power factor,
to improve power factor capacitors are used which restore
the phase diff.

Why neutral wire is heating in symmetric single phase distribution of three phase power supply?

2 Answers  

---

What is the rating of your substation and what are the different types of substations?

5 Answers   Bhel, NTPC, UPPCL,

---

why the autotransformer burnt while stating the pumpmotor?, In starter and motor there was no abnormality.

4 Answers  

---

what is priming pump?why it is used ?

2 Answers  

---

what is the effect of power factor in electrical circuit ? if we mainten power factor near about unity (0.999) our energy consumption Units increase or decrease?

11 Answers   Piramal Healthcare,

---

---

How many electrones need to flow in one second to equivalent to one Ampere.

3 Answers  

---

i have one transformer 1000kva, 11/.433kv. we are using 200/5 amp. ct unit for measuring purpose, & one 800 amp. V.C.B Unit for the same t/f operate, i wants to known the primary current of T/F is only 53 amp. why we used 800 amp. V.C.B ? & 200/5 amp. CT Unit.

4 Answers  

---

Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).

0 Answers  

---

A Generator is in running condition and Rotor earth fault alarm is coming.How to check on line(i.e in running condition) whether there is actual earth fault in rotor or not.

4 Answers  

---

why dc power can not be used in transformer?

33 Answers   GE, Sail,

---

How will you Physically differentiate A.C and D.C motor?

10 Answers   BSNL, Polycab,

---

How to calculate the no of Ceiling fan (1200mm sweep) per unit area?

0 Answers  

---