Interested to Buy Any Domain ? << Click Here >> for more details...
what is power factor? whether it should be high or low? why?
- 11 Answers
- 16939 Views
- I also Faced
- E-Mail Answers
Answer Posted / rajani
Power factor is the ratio of true power to apparant power
and it is the cosine of angle between voltage and current
P=V I *pf
if pf is poor ex: 0.17 to meet actual power load has to
draw more current(V constant),result in more losses
if pf is good ex: 0.95 to meet actual power load has to
draw less current(V constant),result in less losses
if cosign angle is 80degrees cos 90= 0.17 means pf =0.17
current vector is lagging 80degrees (i>>v) so load draws
more current so losses are high
if angle is 20 degrees cos 20 = 0.93 means pf =0.93 (good
pf) current is lagging only 20degrees, i value is less
so to decrease current drawn of the load we have to
maintain good pf
| Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
what is PWM in IGBT and how it works for drive.?
how we can calcultae the short circuit level for bus bar
why occ characteristics of generator is also called as magnatization characteristics ?
in ring main system we use the isolater b/w transfer bus and main bus if we r not use isolatar than wat will be the effect in our sys.
Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,
Explain about 3 phase motor fault current calculation with examples?
what is the principle of operation of CFL ??
how the aircraft outer body and inner body is separated ?
on a three-winding transformer relationship delta-delta-star, on third winding why the relationship is a star? what are the advantages and disadvantages? Thank you and please help
Why an ac solenoid valve attract the plunger even though we interchanges the terminal? Will the poles changes?
Differentiate between ideal and non-ideal voltage sources?
I Just want do EHS Certified Certification Distance Course From Govt approved,so can any body provide me details.
Please define ampere?
any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?
Why does amplifier gain reduce?
