Polyphase System: Get Answers to Your Questions

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In a 3-phase synchronous generator, the line currents and phase voltages can vary with the load, contrary to the assumption of them being constant. When connected to an unbalanced load, the return current through the neutral will also become unbalanced, potentially leading to increased neutral currents. Grounding a load in a 3-wire system does not fully replicate the function of a neutral, as it may not provide the same level of fault protection or current return path. Understanding these dynamics is crucial for effective management of 3-phase systems. Clarifying these concepts can enhance the application and reliability of polyphase systems in practical scenarios.
Lunat1c
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Hi,

I have been studying 3-phase systems recently and while going through my textbooks I realized that there are some things which are not quite clear. So I'm going to give it a shot and ask here.

1. Does a 3-phase synchronous generator always supply the same line currents and phase voltages independent of the load?

2. What happens to the return current (the current through the neutral back to the generator) when the generator is connected to an unbalanced load?

3. If instead of having a neutral (i.e. the generator is a 3-wire system instead of a 4-wire system) the load is grounded, will this serve the same purpose as the neutral?

This is all I have in mind for now, thanks in advance!
 
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