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
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Which of the following is true for a system with an unbalanced load of a three-phase system?
- If the load on a three-phase system is unbalanced, the power calculation becomes more complex because
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Important Questions from Three Phase Circuits
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Three equal impedances are first connected in star across a balanced 3 phase supply. If connected in delta across the same supply
The power taken by a 3-ϕ load is given by the expression
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