The NEC requires each ungrounded service conductor to have overload protection [Sec. 230.90]. And you can’t insert an overcurrent protection device in a grounded service conductor unless it simultaneously opens all conductors of the circuit [Sec. 230.90(B)].
Service Equipment Overcurrent Protection, Part 1
In an industrial facility today, leaving out a power monitoring system when specifying the service equipment is almost always a poor decision.