[TimV]

I have bumped into an error.

Not my error, i think.

The contact of the 200A relay has an resistance of 1Ohm.

And this is why my test did not work.

If we ma a short circuit with the relay. The maximum current that will flow =16A.

I=U/R
I=16V/1Ohm
I=16A...
So way off the 200A capable.

So what voltage do i need to have to let 200A flow?
U=IxR
U=200Ax1Ohm
U=200V difference...
So there is a heatloss of?
P=UxI
P=200Vx200A
P=400W.

My opinion is that the relay in that positon will melt right away...

Normal resistance of the contact of an relay is max 0,2 ohm!