In case of symmetrical network, the neutral current is:
- Infinity
- Maximum
- Zero
- Any of the above
Correct answer: 3. Zero
Explanation:
In a symmetrical network, the term “symmetrical” implies that the network elements, such as impedances, loads, and sources, are symmetrically arranged. In such a system, the electrical parameters are balanced and equal on all phases.
For a three-phase system, the neutral current is the current flowing in the neutral conductor. In a perfectly symmetrical system, where the loads are balanced and the impedances are the same for all three phases, the phasor sum of the three phase currents is zero at any point in time. This means that the currents flowing in the three phases cancel each other out, and as a result, the neutral current is zero.
So, in the case of a symmetrical network, the correct answer is “Zero.”