In a balanced three-phase system, the power delivered by the system depends on
phase voltage, phase current and power factor
The correct answer is Option 2: phase voltage, phase current, and power factor.
In a balanced three-phase system, the total real power (P) delivered is given by the formula:
\(P = \sqrt{3} V_L I_L \cos(\phi)\)
Where:
- \(V_L\) is the line voltage
- \(I_L\) is the line current
- \(\cos(\phi)\) is the power factor, where \(\phi\) is the phase angle between voltage and current.
Alternatively, using phase values, the real power per phase is \(P_{phase} = V_{phase} I_{phase} \cos(\phi)\), and the total real power is \(3P_{phase} = 3V_{phase} I_{phase} \cos(\phi)\).
This equation clearly shows that the power delivered depends on all three factors: phase voltage (\(V_{phase}\) or \(V_L\)), phase current (\(I_{phase}\) or \(I_L\)), and the power factor (\(\cos(\phi)\)). Changing any one of these factors will directly affect the total power delivered by the three-phase system. Options 1, 3, and 4 are incorrect because they only consider one factor, neglecting the influence of others.
Similar Questions
- In a balanced 3 phase circuit, neutral current is always ________.
Important Questions from Three Phase Circuits
The direction of rotation of a three-phase induction motor is determined by its ________.
The real power taken by three-phase load is given by -
A phase sequence indicator rotates clockwise for phase sequence of RYB. If the phase sequence is changed to BRY, it will _______.
If a phase sequence indicator rotates clockwise for a phase sequence of RYB, then what happens when the phase sequence is changed to BRY?
In a star-connected system, the phase angle difference between line and phase voltage is:
