NavonLogic Blog
Electrical Power Load Studies and Reliability: Site Selection for Manufacturing
Electrical engineering still gets treated, in too many projects, as a late-stage detail. The site is chosen, the building is laid out, the equipment is specified, and somewhere in the back half of detailed design a load study turns up an interconnection problem that should have been visible eighteen months earlier. By that point, the room to fix it cheaply is gone. A real load study belongs in the screening phase, while the team can still let go of a site that won’t carry the operating model.
What “feasible” actually means before commitment
A site can look fine on the brochure utility-capacity number and still fail when real loads are modeled honestly. Motor inrush at startup. Coincident peaks across two production lines that ramp in different shifts. Future expansion the business case quietly assumes. The capacity headroom that looked comfortable at 70 % of nameplate often isn’t there once the numbers reflect actual operating reality.
The same goes for fault levels and protection coordination. A site at the end of a feeder may have nominal voltage and adequate apparent capacity, while still presenting fault duties or voltage-regulation behavior that drive significant equipment cost or even rule out certain process choices. None of this is exotic engineering — it’s exactly the kind of thing the project team can know early if anyone asks.
Reliability is an operating cost, not a one-time spec
Power quality and outage history shape daily operations more than the cents-per-kWh number ever will. A region with a strong nominal rate but weekly voltage sags will quietly tax production yield, drive a UPS / generator scope nobody priced into the original budget, and complicate process commissioning. The best signal here is the utility’s own reliability metrics over multiple years, plus conversations with existing industrial customers in the same feeder area.
For continuous-process operations and for facilities running sensitive automation, reliability moves quickly from “infrastructure topic” to “P&L topic.” We’ve worked on plants where six-figure annual scrap losses traced back to two or three brief disturbances a month — and the disturbances were known to the utility long before the plant moved in.
Putting the load study in its proper sequence
The point isn’t that load studies should be elaborate at the screening stage. They shouldn’t be. The point is that a directionally correct study, with the right load profile and the right interconnection assumptions, belongs alongside the workforce, water, logistics, and permitting screens — not after them. Sites get ranked and dropped on weaker evidence than that every day.
Once a location is chosen, there’s still important detailed work to do — and it’ll be cheaper, faster, and less surprising because the early study set the right expectations.
Continue Reading
Browse more industrial-planning articles in the Blogs archive, learn more about NavonLogic, or start a conversation through the Contact page. The companion article in German is Auswahl eines Standorts: Elektrische Laststudien und Zuverlässigkeit.