Good morning everyone
i would like to know if i can work with 3 isolation transformers in parallel because i need 21KW
I would not like to attempt this. In theory it would work, but you are very likely to run into issues with balancing the load evenly across all units. They are passive devices.
Manufacturing tolerances and mismatches in cable length play a critical role in current sharing between such devices.
Passive isolation transformers are unlike paralleled active devices like Quattro's which can chat amongst one another to actively balance the load between themselves. Additionally, active devices are calibrated to bring the tolerances between them much closer.
Additional resources still need to be added for this topic
3 People are following this question.