If the current to your client devices exceeds the specified 600-W level, the software will visually and acoustically notify you of the overload and will initiate a shutdown soon after.
The Power Event Summary offers a nice visual way of accessing the software's event log.
The Risk Assessment is based on a parameter and component check list.
Clearly, the input voltage is not as steady as you might believe.
There is a Deluxe Edition of the PowerChute software, which is suitable for network management of 5+UPS units and comfortable mass deployment. However, it is not free.