Earth Leakage current understanding
I'm having difficulty understanding your questions, but I think rather than answering the details I can address the overall problem:

Earth leakage protection is designed to disconnect power when small currents are detected flowing in the earth connection. The philosophy is that any current flowing in the Earth is a sign that current has "leaked out" of the normal active-neutral circuit. So the idea is that you make all intentional circuit connections to only active (phase) and neutral, but run earth nearby to "catch" any stray live conductors.

So when you "short the neutral and earth connect together", you can no longer use this protection scheme - normal currents will easily flow to earth and trip the earth leakage protection.

Earth leakage protection will only work if you deliberately do not connect any part of your main circuit to earth.