Actually I am not certain.
I suspect the "swing-switch" on the top right of circuit diagram is part of it, although I don't know.
Certainly, if you look at that, if it is connected either way, the coil marked III will be energized regardless of what the switches marked I do.
The coil marked I seems to be on if the "Ein" button is pressed, so III would start out energized. If "Aus" is pressed, I will be de-energized, but III stays on until the "swing switch" disconnects.
However, that is not a certainty, by any means. I suspect there are a few off-diagram things as well, and there may be states I have not noticed.
Had a mate round today he is an electrician
he said something about circuit diagrams
some being shown in there live "running"state
and some being shown in there dorment state.
he wasnt sure what the Germans do.
all the best.mark
It appears that upper right are relay control circuits using 220volts to control direction of motor rotation.
Lower right appears to be a diagram showing
what occurs when those relays are energised.
It appears that by switching the order in which the phases are wired to the motor that the rotation reverses. Only phases 1 and two are switched to acomplish this.
I'm still waiting on the rear bearing for the motor before I can carry on ..should be with me tommorrow .then the fun starts.
Today I made a decent bearing installer, instead of the old peice of pipe I had before.
there are no clues on that diagram what colour wires are used where and how and nor have I any idea so far, what voltage the lamp is.
all the best..mark
Yes, it reverses, the two contactors on the diagram labelled "I" and "II" below and to the left of the transformer symbol show that clearly.
The transformer supplies control voltage at top right.
Evidently, "R" "S" and "T" are the power to the motor. The symbols appear twice, once at lower portion at the motor connection, and also at upper incoming line at top left.
The "chart" seems to indicate the motor connections, but the conventions are not familiar to me, so I haven't figured it out totally.
But, it appears, for instance, to show in one condition "R" connected to "V2", S connected to "U2", and "T" connected to W2. U4, V4, and W4 are connected.
They might illustrate two different voltage connections, and the way the reversal is done for each.
Whatever it is, I don't think it was original. Nothing on the wiring diagram looks like a motor or generator or rotary sensor. And the cabinet picture looks like it has a lot more "stuff" in it than the diagram shows. Both of these observations lead me to believe that the wiring has been extensively modified. My best guess is it was some kind of speed sensor, perhaps for a fancy speed controller. Or perhaps a small generator for an acessory that needed a different voltage, number of phases, or frequency.
If you want original wiring, follow the diagram and trace the wires it shows. Remove everything else.
Make it fit.
Paul.....how about the "swinging switch" at top right?
So long as that is in either connected position, it will latch-in coil "III". Depending where coil "III" is, it could force a slow-down or stop before reversing. If that switch is powered by the little generator, that would make 100% sense, and work as expected.
I wouldn't be so sure the generator dealie-bob isn't original.
That generator thingy is original ....otherwise the shaft on the motor would not be so long.
bearing is installed now......so getting close.
all the best.....mark