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The specific DCD talk named “Critical power architectures for AI data centers with Mehdi Rajehi, ABB” could not be verified in the available DCD listings, and no transcript or confirmed remarks from Rajehi were located. That means its agenda, recommendations and technical conclusions cannot responsibly be attributed to him. Separate ABB material does address AI data-center power, DC architectures and medium-voltage UPS—but it features different speakers and should be treated as context, not as a record of the named talk.
What is known about the named DCD talk
The available listings do not establish that a DCD event or recording matching this exact title took place. No verified event date, transcript or direct quote from Mehdi Rajehi was found. In particular, the material does not show that he endorsed a specific power topology, product or deployment plan.
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Other DCD/ABB material is not a substitute for that missing confirmation. A separate DCD video description discusses medium-voltage UPS for AI and large-scale data centers and names Joe Prudente. Other DCD/ABB content features Mario Macri. Neither speaker’s comments should be attributed to Rajehi or presented as the contents of his supposed talk.
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AI infrastructure puts attention on how facilities deliver reliable power to increasingly demanding compute loads. The relevant design questions include how utility power is converted and distributed, how the facility maintains continuity during disturbances, and how the electrical system can accommodate growth without major redesign. The available sources do not establish a particular rack-density threshold or a universal architecture for answering those questions.
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- 1500VA/1000WPFC Sinewave Uninterruptible Power Supply (UPS): Uses sine wave output to provide battery backup power for Active PFC & conventional power supplies; Safeguards security systems, audio/visual equipment, and networking devices
- EIGHT NEMA 5-15R OUTLETS: Provide battery backup & surge protection for connected devices; INPUT: NEMA 5-15P right angle, 45 degree offset plug with six foot power cord
- MULTIFUNCTION, COLOR LCD PANEL: Displays immediate, detailed information on battery and power conditions; Color display alerts users to potential issues before they can affect critical equipment and cause downtime
- SHORT-DEPTH RACKMOUNT: 10.5 inches in depth, the UPS fits comfortably in short-depth rack installations where space is at a premium; AUTOMATIC VOLTAGE REGULATION: Corrects minor power fluctuations without switching to battery power, extending battery life
- 3-YEAR WARRANTY – INCLUDING THE BATTERY; $500,000 Connected Equipment Guarantee; FREE PowerPanel Management Software (Download); UL SAFETY CERTIFIED: Product has been tested in a UL certified lab and listed with UL as meeting or exceeding safety standards
ABB’s official architecture page makes a strategic case for considering DC distribution: as more sources and loads are DC-native, the company argues, a DC architecture may avoid some conversion stages. ABB also says DC could help fit more compute behind a constrained grid connection and meet the power-density demands of next-generation AI hardware. Those are ABB’s positions, not independent proof that DC is more efficient or preferable in every facility. Project-specific engineering must account for the actual loads, equipment, protection, resilience requirements, grid conditions and retrofit constraints.
What ABB says about 800V DC and NVIDIA
ABB’s page states: “Currently, ABB is developing 800V DC solutions for next-generation AI infrastructure with NVIDIA.” This describes development activity. The cited statement does not establish that 800V DC is a deployed industry standard or that a generally available product is ready for a particular data-center project. It also does not connect that development work to the unverified Rajehi talk.
Rank #2
- Topology: Online/Double-conversion
- Receptacle: (6) 5-20R, (1) L5-20R
- Output waveform: True sine wave
- Output nominal voltage: 120V
- Rack size: 2U
ABB’s broader claim that DC is “becoming the required architecture” for AI data centers should likewise be read as company advocacy, not a settled industry consensus. Whether a facility should use AC, DC or a hybrid arrangement depends on its design and operating requirements; the available information does not provide a like-for-like performance comparison or quantify savings.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsWhere UPS fits in a critical-power design
A UPS, or uninterruptible power supply, is equipment used to support continuity of electrical supply when normal power is disrupted. It is a relevant part of critical-power planning, but the available material does not specify an appropriate UPS model, capacity or configuration for an individual facility.
Rank #3
- ADVANCED PURE SINE WAVE UPS: 5000VA/4500W line interactive system compensates for power fluctuations, protects against equipment damage, and prevents data loss in the event of a power disturbance
- 4 SURGE/BATTERY BACKUP OUTLETS: 4 battery backup/surge protection outlets, 2-year warranty, compact 2U rack mount/tower convertible configuration, and controllable outlet groups
- 1 GROUP OF PROGRAMMABLE OUTLETS: Provides ability to cycle power remotely for connected equipment and turn off non-critical equipment to extend battery run time of critical load
- AVR LINE INTERACTIVE: buck/boost Automatic Voltage Regulation (AVR) technology protects against utility power fluctuation without battery operation, prolonging battery life
- ROTATABLE LCD DISPLAY: Allows users to view real-time conditions, alarm notices, and runtime informations; All Liebert UNITY network communications cards come integrated within the unit
A separate ABB DCD video description highlights medium-voltage UPS in the context of AI and large-scale data centers. That confirms the subject is being discussed in the sector; it does not establish that Rajehi addressed it, nor does it provide enough detail to compare specific UPS systems or determine whether medium-voltage equipment is right for a given project.
How to assess an architecture for a real project
The sources support questions to take to the project’s electrical and data-center engineering teams, rather than a one-size-fits-all recommendation:
Rank #4
- 500VA/300W Smart App LCD Uninterruptible Power Supply (UPS): Uses simulated sine wave output to provide battery backup power to protect department and workgroup servers, network devices, and telecom installations without Active PFC power supplies
- SIX NEMA 5-15R OUTLETS: Four battery backup and surge protected outlets; Two Surge protected outlets; INPUT: 15A, NEMA 5-15P straight plug with 10 foot power cord
- MULTIFUNCTION LCD PANEL: Provides runtime in minutes, battery status, power conditions, alerting users to potential problems before they can affect critical equipment and cause downtime; REMOTE MANAGEMENT: Requires optional RMCARD205 management card
- AUTOMATIC VOLTAGE REGULATION (AVR): Corrects minor power fluctuations without switching to battery power; UL SAFETY CERTIFIED: Product has been tested in a UL certified lab and listed with UL as meeting or exceeding safety standards
- 3 YEAR WARRANTY – INCLUDING BATTERIES; $300,000 Connected Equipment Guarantee
- Conversion and distribution: Map where power changes between AC and DC, identify which sources and loads are DC-native, and ask what conversion stages a proposed design would actually remove.
- Grid constraints and capacity: Establish the facility’s available utility capacity and the limits on expansion. Treat claims about fitting more compute behind a constrained connection as design hypotheses to validate, not guaranteed outcomes.
- Continuity and resilience: Define the required response to utility interruptions and equipment failures, then evaluate how UPS and the wider critical-power system meet those requirements.
- Scale and change: Determine how capacity can be added, whether modular infrastructure is appropriate, and how future changes would affect the existing installation.
- Deployment maturity: Distinguish equipment and designs available for procurement from solutions described as still in development. ABB’s statement about 800V DC places that work in the latter category.
- Retrofit and procurement: For an existing site, assess compatibility, construction disruption, protection and control requirements, and the scope of redesign before comparing proposed architectures.
The available sources give no project-specific cost, efficiency, capacity, deployment schedule or retrofit result. Those values require a defined facility and comparable engineering proposals.
Claims that need careful attribution
ABB’s architecture page displays a projection that global data-center electricity consumption will double by 2030, but the retrieved passage does not identify the original publisher or the year of that projection. It should not be treated here as an independently verified statistic. The same page says that one in four data centers use ABB DC technologies, but the passage does not state the measurement year or methodology. That figure is therefore an ABB claim without enough detail in the cited material to assess its scope.
For background, see ABB’s page on its work with NVIDIA, ABB’s discussion of power architectures for AI data centers, and DCD’s critical-power listings. These sources provide context; they do not verify the contents of a talk by Mehdi Rajehi with the title in this article.
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