Basic Electrical, Electronics And Instrumentation Engineering: UNIT I: Electrical Circuits
Power And Power Factor
It is defined as the product of the applied voltage and the active component of the current.
POWER
AND POWER FACTOR
Power
The
average power in an alternating circuit is given by:
P
= VI cos ᴓ watts.
The
power triangle shows three types of power.
1)
Apparent power
2)
Real power
3)
Reactive power.
Apparent Power (S):
It
is defined as the product of rms value of voltage current. It is denoted by S.
S
= VI VA.
It
is measured in Volt-Amp (VA).
Real Power (or) True Power (or)
Active Power (P):
It
is defined as the product of the applied voltage and the active component of
the current.
P=VI
cos θ watts.
It
is measured in watts.
Reactive Power (Q):
It
is defined as the product of the applied voltage and the reactive component of
the current.
It
is measured in volt amp reactive.
Power Factor
It
is defined as the factor by which the apparent power must be multiplied in
order to
It
is the ratio of true power to apparent power.
Power
Factor = True Power / Apparent Power
The
nature of power factor depends by the position of current with respect to the voltage.
If
the current follows the voltage the power factor is unity.
If
the current lags voltage the power factor is said to be lagging.
If
the current leads the voltage the power factor is said to be leading.
Basic Electrical, Electronics And Instrumentation Engineering: UNIT I: Electrical Circuits : Tag: : - Power And Power Factor
Basic Electrical, Electronics And Instrumentation Engineering: UNIT I: Electrical Circuits
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Basic Electrical, Electronics and Instrumentation Engineering
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