I’ll give you my thoughts, since no one else has “waded in” yet, with the caveat that I might be better described as “ex” rather than currently “expert”. I would expect that any limit is with the supply system capacity transformers, cables and contactors. The purpose of a star-delta starting arrangement is to limit the motor starting current in a simple and economic way. At the other extreme, I used to work on high voltage motors of several megawatts capacity, which achieved this aim by use of rotor resistance. Power was delivered direct on line, by a HV “breaker” (sometimes termed Motor Switching Device). So why do you want to use star-delta in preference to other methods? A quick google search led me here https://library.e.abb.com/public/6b4e1a3530814df0c12579bb0030e58b/1SFC132060M0201.pdf
I’ll give you my thoughts, since no one else has “waded in” yet, with the caveat that I might be better described as “ex” rather than currently “expert”. I would expect that any limit is with the supply system capacity transformers, cables and contactors. The purpose of a star-delta starting arrangement is to limit the motor starting current in a simple and economic way. At the other extreme, I used to work on high voltage motors of several megawatts capacity, which achieved this aim by use of rotor resistance. Power was delivered direct on line, by a HV “breaker” (sometimes termed Motor Switching Device). So why do you want to use star-delta in preference to other methods? A quick google search led me here https://library.e.abb.com/public/6b4e1a3530814df0c12579bb0030e58b/1SFC132060M0201.pdf
