I was rather surprised to see two contactors wired in parallel.
It appears to be the 3 phase for the knee motor.
That huge motor can probably lift 500 or 600 pounds.

Paul Lamar

Hi Paul
There is not quite enough of the wiring visible to be completely confident but I think you will find the two lower contactors are a standard reversing
arrangement and the upper contactor is a main contactor. Power supplied to the main contactor from the flex cable bottom left corner. main contactor
output to both the direction contactors sequence  RST  RST  and RST the output side of the direction contactors are fese reversed for change of Direction
The center contacts are the same phase on each but the outer two phases are the reverse on each ( outside to outside inside to inside sequence TSR RST )_  .The red wires looping
between all coils have look to be single digit and appear 9 suggesting that side of the coils are the common or neut. Wires 24 and 22 are the control wires and go to go to interlock contacts on each contactor and then to the coils.
The purple wire coming from the bottom right appears the be the main contactor control.

regards
Bill McDonald

Ah so very interesting. I did not know contacters were involved with 3 phase  motor reversing.
I did not get a schematic when I bought the Kasuga used. If you have one with the manual switches
incorporated I would love to have it.


I am guessing now but I suspect (I could be very wrong)
that the switches only control the contacters by switching the 100 volt relays in the contacters.


This schematic I found on the Internet. It does not show the switches.

This is what the knee control switch box looks like. Most of the wires are labeled.

What are OL's?  I assume the the F an R circles are lights.
I assume that the red R and F letters are the limit switches.

Thanks Bill.

Paul Lamar

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