Question
Download Solution PDFA 220 V 3-phase voltage is applied to a balanced delta connected 3-phase purely resistive load. What is the ratio of reactive power to active power?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The power for delta connected load is given by:
The active power is given by:
\(P={3}V_PI_P\space cosϕ\)
The reactive power is given by:
\(Q={3}V_PI_P\space sinϕ\)
Here, VL and IL are line voltage and line current
Vp and Ip are phase voltage and phase current
Calculation
For resistive load, the power factor (cos ϕ) is equal to 1.
\(P={3}V_PI_P\space \times 1\)
\(P={3}V_PI_P \)
If cos ϕ = 1, then sin ϕ = 0
\(Q={3}V_PI_P\space \times 0\)
Q = 0
\({Q\over P}={0\over 1}=0\)
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