Answer / pradhyumn

Ideal Power factor is 1.
It is ratio of real power(measured in watts) flowing to the
load to apparent power(measured in VA). It ranges between 0
to 1.

P.F. is a measure of the degree to which a given load
matches to that of a pure resistance.

P.F.=1 if load is purely resistive.
P.F.=0 if load is inductive or capacitive or both.

For RL-circuit P.F. is between 0&1.(lagging)
For RC-circuit P.F. is between 0&1.(leading).

If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

0 Answers  

---

how to determine motor size for a fan application?

0 Answers   EDC,

---

why induction motor always operate at lagging p.f.?

4 Answers  

---

What's the difference between a generator using 50Hz and 60Hz? When do we need to use a generator 50Hz and 60Hz?

3 Answers  

---

WHEN TWO ALTERNATORS ARE OPERATING IN PARALLEL, EXPLAIN WHY IT IS OBJECTIONABLE TO OPERATE ONE AT A LEADING POWER FACTOR AND ONE AT THE Lagging power factor?

1 Answers  

---

How many types of interlocking use in screw type air compressor,make-Kaser(BSD MODEL)?

0 Answers   Automobile, Siddhi Vinayak,

---

why holding contact is not using in VCB and ACB breakers?

1 Answers   Cethar,

---

what is difference between AC VVVF drive & Dc VVVF drive explain their working principle?

13 Answers   Apollo, OPS,

---

IN 3 phase induction motor where we give i/p supply & how its working ?

2 Answers  

---

when we connect the capacitor banks in series with the circuit?

3 Answers   Cipla,

---

What is thef ormula to calculate the rating of a capacitor for a single phase motor

2 Answers  

---

where reactive power is used

0 Answers  

---