Need help with adding a new three phase sub panel

[seamuseg1]

Hi there,

Looking for guidance/solution for the addition of a second three phase run to a three phase sub panel for a new workshop. Currently have a 200amp three phase main breaker coming out of a Cooper B-Line (catalof no 227 MTB) going into a three phase Cutler-Hammer 200amp panel. Here's my issue, I've run a new 3/0 run 500' to a work shop and somehow need to tie into the existing equipment and don't know how to accomplish or what sub panel I should use. Also, not sure what the voltage drop is going to be. I was thinking there could be a type of distribution box I could connect both 3 phase runs out of to each of the two panels (existing and new). Please bear with me as I'm not an electrician and just looking for guidance.

 

[Dennis Alwon]

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