Why is A2 of the switch in the middle (E321) connected to L3 instead of neutral? Shouldn't it be neutral???
I think the switch is supposed to switch depending on whether there is 230V across A1 and A2. And the timer on the far right (E124) is supposed to accomplish this, the moment it receives "the signal" from my energy provider over mains electricity.
EDIT: Maybe A2 is not connected to L3. But it's NOT neutral either. There is:
0V between A2 and L3.
230V between A2 and neutral.
400V between A2 and L1.
400V between A2 and L2.
I guess the part that is throwing me is the switch. I'm not seeing any other signal wires going to it though (other than the A1 and A2 coil wires) so whatever logic it is doing for that "auto" setting must all be done internally. That switch is what made me think that maybe it reads ripple control signals because I know that is done in a lot of areas for using electricity off peak hours. But if it does read ripple control then it looks way different than any other ripple control switch I have ever seen because you're right, it does just look like a normal contactor other than that switch. I guess maybe it could also just have a built in timer like an old school freezer defrost timer module.