Is ground-fault protection required for 480 V, 3-phase feeders 1,000 amperes or more, if the upstream main circuit breaker has ground-fault protection?
and see handbook p. 94
I'm amending my answer -
If we are talking about Health Care (Article 517, Critical Care) then no. See 517.17. There isn't enough info given in the question to know how to respond.
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