Which of the following statements about a star connected three phase system is correct?
The neutral wire carries no current in case of balanced ideal load.
To determine the correct statement about a star-connected three-phase system, let's analyze each option:
- The neutral wire has higher voltage than the phase wires.
This statement is incorrect. In a star connection, the neutral wire is at zero potential or ground potential, and each phase voltage is measured with respect to the neutral.
- There are two neutral wires in a star-connected three-phase system.
This statement is incorrect. A star-connected three-phase system typically has one neutral wire connecting the center points of the phase windings.
- The neutral wire carries no current in case of balanced ideal load.
This statement is correct. When the load is perfectly balanced, the sum of the currents flowing in the three phases is zero, hence no current flows through the neutral wire.
- The neutral wire is used for grounding purposes only.
This statement is incorrect. While the neutral wire can provide a grounding function, its primary role is to allow the return path for unbalanced currents and to stabilize phase voltages.
Conclusively, the correct statement is: The neutral wire carries no current in case of balanced ideal load.
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:
