Yes. HECO can test run motors up to 13.8KV, on our 4000KVA testing center, apply voltage to the motor simulating the full voltage that exists within the given plant. 230v-13,800 volt.
We also have various electrical testing devices including a 50KV AC HiPot capable of handling leakage up to 3 Amps.
To find out more, check out HECO's 2-part series on their blog, Here You Go:
HECO has lots more information about testing electric motors in Helpful Articles resource and also our blog, Here You Go. Simply go to our Home Page and type in "testing" in the search field in the middle of the page...where is says, "What are you looking for?"