contactor and switch

Joined
Feb 13, 2022
Messages
6
Hello ,
I'm not sure if its the right section to ask this question but i guess its something related to battery wiring .
https://prnt.sc/C_3vlFhmCyvY
1st question i cant understand the contactor connection with switch
2nd question do i need dc/dc converter for this contactor and switch
3rd question if my battery is above 50v with discharge current of 200 amp and my motor and driver which are kls7245h and qs motor 273 , do i need a voltage converter to deliver only 48v to controller ? ik both support up to 72v but i only need 48v , is there something in controller that can deliver only 48v to the motor not the 50v ?
 
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