Power Factor (Cos 0) = ?
Answers
Answer:
When the power factor equals zero (0), the phase angle between the current and the voltage will be 90o as: cos-1(0) = 90o. In this case the actual power consumed by the AC circuit is zero regardless of the circuit current. ... Then an AC circuit can be defined to have a unity, lagging, or leading power factor
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Answer:
Answer: Power factor may be defined by three definitions and formals as follow.
Step-by-step explanation:
1). The Cosine of angle between Current and Voltage is called Power Factor.
P = VI Cosθ OR
Cosθ = P / V I OR
Cosθ = kW / kVA OR
Cosθ = True Power/ Apparent Power
Where:
P = Power in Watts
V = Voltages in Volts
I = Current in Amperes
W = Real Power in Watts
VA = Apparent Power in Volt-Amperes or kVA
Cosθ = Power factor
2). The ratio between Resistance and Impedance in AC Circuit is known as Power Factor.
Where:
R = Resistance in Ohms (Ω)
Z = Impedance (Resistance in AC circuits i.e. XL, XC and R known as Inductive reactance, capacitive reactance and resistance respectively) in Ohms (Ω)
Cosθ = Power factor
Impedance “Z” is the total resistance of AC Circuit i.e.
Z = √ [R2 + (XL + XC)2]
Where:
XL = 2πfL … L is inductance in Henry
XC = 1/ 2πfC … C is capacitance in Farads
Related Post: Difference Between Active and Reactive Power
3).The ratio between Active Power and Apparent Power in volts-amperes is called power factor.
Cosθ = Active Power / Apparent Power
Cosθ = P / S
Cosθ = kW / kVA
Where
kW = P = Real Power in kilo-Watts
kVA = S = Apparent Power in kilo-Volt-Amperes or Watts
Cosθ = Power factor