Electrical

Lawrence Berkeley National Laboratory (Center of Expertise for Energy Efficiency in Data Centers) / U.S. DOE FEMP · 2020

Data Center Master List of Energy Efficiency Measures, Version 2.0 (September 2020)

Compare the planned UPS module count and redundancy scheme against the load curve: check the per-unit load at day-one and at full build, and consider modular units or switching off surplus modules.

• Variable-speed chillers usually peak at 60-80% of full load; constant-speed chillers peak at full load.

U.S. DOE Better Buildings / Lawrence Berkeley National Laboratory · 2017

Data Center Metering and Resource Guide (February 2017)

At a stand-alone site, design meters that record energy (kWh) at the utility entrance and at the UPS output (or at panels serving only IT if there is no UPS); a UPS display that shows only power (kW) is not enough.

• PUE Level 1 for a stand-alone data center is utility meter reading divided by UPS output energy (M1/M2).

ASHRAE TC 9.9 · 2016

Data Center Power Equipment Thermal Guidelines and Best Practices

Encode the A1-A4 table (dry bulb, dew point, altitude derate) as the canonical envelope lookup; site max inlet = classMax - (altitude-900)/derateStep.

• Design power equipment for 40 degC ambient (A3).

Schneider Electric · 2026

DC Arc Flash Analysis: A Practical Study on 800 VDC AI Data Centers

Subject DC arc-flash outputs to engineer verification in expert mode.

• Inside an IT rack: 0.10 cal/cm² at 3 ms and 0.55 cal/cm² at 30 ms.

Vertiv · 2023

Deploying Liquid Cooling in the Data Center: A Guide to High-Density Cooling (1 MW IT load)

Calculation default: DLC flow = 1.5 L/min per kW of liquid-captured heat; to adjust by dT use flow = P/(4.18 x dT) L/s.

• Newest AI servers approach 6-10 kW TDP per server

Eaton · Year not stated

Eaton UPS battery runtimes

Use the curve of the selected UPS and battery configuration in runtime calculations.

Schneider Electric · Year not stated

Electrical Installation Guide: conductor voltage drop and short-circuit current

Make circuit type (3-phase or two-conductor), cos(phi) and conductor temperature explicit inputs to the cable voltage-drop calculation.

• Related standard: IEC 60364.

TÜV NORD · 2026

EN 50600 — data centre facilities and infrastructures (overview and certification)

In an 'EN 50600' standards profile, offer separate availability-class selectors for power, cooling and cabling (instead of a single Tier), plus a protection-class selector per room or zone

• Protection classes 1-4 for unauthorised access and other hazards; physical-security zoning required

Schneider Electric · 2015

Guidance for Calculation of Efficiency (PUE) in Data Centers

Build the PUE calculator on an explicit load-classification table: each catalog component is IT, infrastructure, excluded or shared.

• PUE = total data center input power / IT load power; ideal 1.0.

Schneider Electric · 2014

Guidelines for Specification of Data Center Power Density

Make the primary density inputs per rack: avgRackKw and peakRackKw per row or zone, default peak/avg 2

• A 50 W/ft2 spec implies only 1,400 W per rack

Vertiv · 2022

High Efficiency Modes of Operation: Path Toward Highest Energy Efficiency Without Load Availability Trade-Off

Add to the UPS catalog an efficiency curve per mode (VFI/VI/VFD) at 25/50/75/100% load and a transferTimeMs per mode.

• IGBT rectifier input PF ~0.99 down to 20% load, THDi <5%

Schneider Electric · 2026

How 6 AI Attributes Change Data Center Design

Add an AI cluster design profile with rack defaults of 750x1,200 mm, 48U, static 2,270 kg and dynamic 1,600 kg.

• GPU TDP trend: V100 300 W, A100 400 W, H100 700 W, B200 1,000 W, B300 1,400 W.

Schneider Electric · 2024

How to Choose IT Rack Power Distribution

Build an rPDU selector: from rack kW, voltage, phases and redundancy, compute PDU count with an 80% (NA) or 100% (IEC) factor.

• Example combination rPDU: 36 x C13 + 6 x C19.

Schneider Electric · 2018

Impact of Leading Power Factor on Data Center Generator Systems

Run a generator check: estimate leading kVAr from the IT kW on the non-UPS or bypass path and the PSU load percentage.

• Old non-PFC supplies had a power factor of about 0.65, dominated by harmonics.

ABB · 2014

Is it time to consider medium voltage UPS systems in large scale data centers?

Add "single-conversion / industrial (VI)" to the UPS topology picker for hyperscale sites with a strong grid, showing efficiency (>99%) beside reduced conditioning.

• Single-conversion efficiency >99%

ABB · 2015

Medium voltage on the rise: How MV systems can cut costs and boost efficiency in data centers

In the layout engine default front working clearance to 1.2 m for MV switchgear and 0.9-1.0 m for LV, with a jurisdiction override (e.g. NEC 110.26/110.34).

• MV range defined as 1,000-38,000 V

Schneider Electric · 2022

Mitigating Electrical Risk While Swapping Energized Equipment

Keep hot-swappable-module and touch-safe fields in the UPS and PDU catalogue

• Fast semiconductor fuses clear faults in about 2-10 ms

Schneider Electric · 2023

Necessary Considerations for Designing DC Architectures in Data Centers

Treat DC architecture as an expert-mode option and attach a mandatory protection-study flag

• The worked example architecture uses a 380 V DC bus

ABB · 2026

Next-Generation Medium-Voltage Architecture for AI Data Centers

For loads above roughly 30-50 MW add a grid-code compliance checklist (LVRT duration, frequency band, RoCoF, PF) and let users choose LV-UPS versus MV-UPS architecture.

• BESS blocks 0.6-21.6 MW with 1, 2 or 4 h durations