Explanation of terms real
power, apparent power and reactive power for AC circuits:
Definition

Real Power

Apparent power

Reactive Power

It is the product of voltage, current and power
factor.

It is the product of voltage and current.

It
is the product of voltage, current and sine of angle between the voltage and
current.


Unit

Has
no other


Formulas

Real power (P) = V I
(In DC circuits)
P = VI CosÎ¸
(
P = √3 V_{L} I_{L} CosÎ¸
P = 3 V_{Ph}I_{Ph} CosÎ¸
(

Apparent power (S) = V I
Apparent Power = √ (True power^{2} + Reactive Power^{2})
KVA =
√KW^{2} + KVAR^{2}

Reactive power (Q) = V I SinÎ¸
Q =√ (Apparent Power^{2}– True power^{2})
VAR =√ (VA^{2} – P^{2})
KVAR = √ (KVA^{2} – KW^{2})

0 Comment(s):
Post a Comment