Which of the following is true when there is an unbalanced star connected load in a three-phase system?
Imbalance in phase voltages.
In a three-phase system with an unbalanced star connected load, it is important to understand the impact on the system characteristics. Let’s go through the options to identify the correct statement:
The magnitude of current in each phase of the load is equal: This is not true in an unbalanced load. In an unbalanced system, the currents in each phase will vary due to unequal loads.
The power factor in each phase of the load is equal: An unbalanced load often results in different power factors for each phase, as the impedance and load characteristics differ.
Imbalance in phase voltages: This is true. An unbalanced load in a star connection means each phase can have different impedance which leads to different phase voltages.
The current in the neutral terminal is zero: In an unbalanced load, there is typically a current flowing through the neutral as the currents from each phase do not cancel out completely.
Hence, the correct statement in case of an unbalanced star connected load in a three-phase system is: Imbalance in phase voltages.
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:
