If transfer logic is not redesigned carefully, an ATS may transfer to a source that is not ready, hunt between sources or delay life-safety loads. That means failed transfers, outages in critical areas and compliance problems that inspectors will find. The risk is highest exactly when everything else has already gone wrong.
USP&E Helps You Keep Transfers Clear and Safe
As your campus grows, data-centre power plants will carry most of the load. Your diesel fleet should be resized for the critical loads that truly need instant backup, and your ATS design should be updated so transfers stay clean at the new scale.
Protect Diesel Start and Transfer Paths First
List every ATS on your site with its loads, priority level, current sources and timing settings. Separate your life-safety, legally required standby and optional standby loads, because codes treat them differently. Your emergency diesels and their transfer paths for life-safety loads should remain independent of the turbine plant wherever codes require it.
Then define your source priority. When the utility fails, which source should each ATS seek first: running gas turbine generators, standby diesels or a combination? How long should it wait, and what happens if the preferred source is overloaded? Write those rules down before anyone touches a setting on your switches.
Check your timing chain end to end. Engine start times, turbine availability, ATS delays and load-step limits must add up to transfer times that meet your code requirements and your own expectations.
Bridge With a Remanufactured GE Frame 6B While ATS Capacity Matures
A remanufactured GE Frame 6B can add firm island capacity while your ATS redesign is completed. Connect it to optional or legally required standby loads first, leaving life-safety transfers on the proven diesel path until the new logic is tested. Check inspection records and controls status before it ships.
An industrial campus needs emergency coverage for process UPS and fire pumps while the utility interconnect slips two seasons. Owning a permanent acoustic-packaged fleet immediately may be right for life-safety cores, while renting additional process capacity covers the uncertain months. TCO weighs mobilisation risk, who buys fuel, who witnesses load banks, and whether a purchase option exists if the delay extends. USP&E structures hybrid paths under one Extreme Ownership conversation so the owned core and rental layer share transfer philosophy and monitoring taxonomy.
Upgrade your ATS controllers where needed. Older units may not support multiple sources, closed-transition transfers or remote monitoring, and replacing them during the redesign avoids a second round of shutdowns.
Plan for AI Gas Turbines and Hyperscale Generators on the ATS Horizon
As data-centre power plants join a site, ATS schemes grow more complex. Plan your source priorities and switchgear for the end state, so each new block fits a clear transfer hierarchy rather than adding exceptions.
Single large diesel behind one ATS suits compact plants with one critical bus. Distributed diesels at remote lift stations reduce cable runs and single-point fuel risk, but multiply exercise logistics. Paralleling fleets at large treatment campuses follow the patterns in paralleling emergency gensets and N+1 emergency fleets.
Proof from recent work
Mining · Tanzania
Perseus Mining, Nyanzaga Gold Project
USP&E supplied 28 Cummins KTA50 containerised gensets for the Nyanzaga Gold Project in Tanzania.
Mining · Mali
Barrick Gold, Loulo-Gounkoto
USP&E refurbished the 104 MW power station, rebuilding more than 80 MW of Caterpillar CM32 engines and adding new zero-hour capacity.
Read the case study ›Data centres · USA
Major US hyperscale developers
USP&E refurbished 7 GE Frame 6Bs to zero hours in-house for major US hyperscale developers.
Your path from first call to reliable power
Dead-bus closing energises a dark emergency bus from the first ready machine, then syncs others. Live-bus closing assumes a reference already present — utility or another source — and is a different logic path. Mixing the two without sequence charts produces failed starts and damaged expectations. Weekly exercise regimes should occasionally prove sync paths, not only soft starts — weekly exercise testing.
Common questions
Why must ATS logic change when gas turbines join an emergency fleet?
USP&E redesigns ATS logic because each switch must know which source to seek first, how long to wait and what to do if that source is not ready. Without clear rules, transfers can fail, hunt between sources or delay life-safety loads.
Should life-safety loads transfer to gas turbines?
USP&E keeps life-safety transfers on paths that meet your code requirements, often the proven emergency diesel path, until any new arrangement is fully tested and approved. Turbines typically serve legally required and optional standby loads first, under a clearly documented source priority.
How should transfers be tested after the redesign?
USP&E tests every ATS under the new logic at commissioning, covering utility failure, source unavailability and return to normal. Transfer times are recorded against code requirements, and exercises continue on your regular schedule, so each switch is proven rather than assumed.
Why owners choose USP&E
USP&E is a full-service engineering, EPC and O&M company, not a broker. One team designs, builds and runs your plant, so nothing falls between contracts.
Is your fleet putting uptime at risk?
Tell us your load, fuel and timeline. A USP&E engineer will come back with options for Emergency Diesel Generators projects, not a sales pitch.