Answer / r.prabhu

powerfactor is a cosine angle between voltage and current.
In industries powerfactor maintained is most important one.

loads are three types 1.Resistive Load
2.Inductive Load
3.Capacitive Load

Inthis load Resistive load is Unity Powerfactor
Inductive load is Lagging powerfactor
Capacitive Load is Leading Powerfactor

PowerfactorImprovement:

1.Static Capacitor
2.Synchronous condensor
3.Phase Advansor

Answer / ravi

power factor is the ratio of real power to apparent power

generally p.f must be 0.95

Answer / rk

we are maintaing the power factor between 0.95 to 0.98.
the most economical power factor is 0.96.
if your pf is below 0.9, electrical board authorities will
impose a penalty.

Answer / nitesh tiwari

0.9 to 0.95

Answer / aziz_raghib2002

0.9 less than that penality

Answer / h.s. raveesh

Maintaining Unity powerfactor is impossible in industries
or in other places. but research is going on for sucessful
use of unity powerfactor

Answer / selvan

Power factor is ratio of real power to apparant power.In
industries maitain the powerfactor is important one.But not
maintain the powerfactor in unity, Loads varied form time
to time.In industries induction motors and tubelights
mostly used. This are inductive loads,this loads create
lagging powerfactor.So to improve the powerfactor by using
static capacitors,syncronous condensor and phase advanser.

Answer / christopher

power factor should be 0.90 to 0.99,should not be more than
1 (unity power factor)

Answer / vinothbabu.k

THE BETTER POWER FACTOR MAINTAINED IS 0.95 TO 0.85,IF BELOW
0.85 THE ELEC BOARD WILL PUT PENALTY,IF WE MAINTAINED ABOVE
0.95 THE BOARD WILL GIVE U THE INSENTIVE FOR THAT.

Answer / n

0.9

what is meant by GOD in transmission system ?

6 Answers   Reliance,

What is function of condenser in fan?

3 Answers  

What are the significant parts of dc generator?

1 Answers  

what should be distance between phase to phase in 415v system?

1 Answers   NTPC,

how to select earthing conductor size of amy motor/panel etc.

1 Answers   Sony, VBB,

Why lose 1 phase voltage in 33kv to 415v stepdown transformer

1 Answers  

why ground cannot be used as neutral as ground also provides close path for current flowing ?

3 Answers  

why the earth terminal in three pin top is longer than rest of the two terminal and of bigger size?

6 Answers   BARC, MAHINDRA,

How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

1 Answers   Reliance,

What is Horan Gap Fuse? Where it is used?

1 Answers  

. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?

1 Answers  

What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?

1 Answers