Collection
Power distribution, UPS, batteries, protection and redundant supply.
337–360 / 418
Open Compute Project Foundation 2020
Check the delivery route against rack height plus 0.5 m, door and corridor widths, and the lift capacity, before agreeing to host or design for Open Racks.
Schneider Electric 2011
When topology is 2N but some loads are single-corded, require a rack ATS per single-corded device by default.
Schneider Electric 2016
Offer N, isolated redundant, N+1, distributed redundant (catcher/STS), tri-redundant, 2N and 2(N+1) in the topology library, and label availability values as comparative rather than absolute.
Schneider Electric 2022
In the single-line builder, raise a warning when the transfer switch has 4 poles and the UPS neutral is not separately derived.
Vertiv 2017
In A/B (2N) racks keep each feed's design load at or below rating x 0.8 (80%-rated breaker) x 0.5; for single phase usable kW = V x I x 0.8 x 0.5.
Schneider Electric 2020
Use C-rate-dependent usable energy (Peukert-like) in the battery runtime calculator rather than nameplate kWh.
Schneider Electric 2026
Add an OT-network section to the design: each monitored device class carries a protocol list and an IEC 62443 certification flag.
Open Compute Project Foundation 2026
For a new site, write the POI LVRT/HVRT envelope and the PFAPR requirement (90% within 2 s) as design criteria, and settle which voltage measurement (line-to-neutral or line-to-line) governs during protection coordination with the utility.
Lawrence Berkeley National Laboratory (Center of Expertise for Energy Efficiency in Data Centers) / U.S. DOE FEMP 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.
U.S. DOE Better Buildings / Lawrence Berkeley National Laboratory 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.
ASHRAE TC 9.9 2016
Encode the A1-A4 table (dry bulb, dew point, altitude derate) as the canonical envelope lookup; site max inlet = classMax - (altitude-900)/derateStep.
Schneider Electric 2026
Subject DC arc-flash outputs to engineer verification in expert mode.
Vertiv 2023
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.
Open Compute Project Foundation 2026
Check that the facility's AC feed (480, 415 or 400 V, single or dual) and the rack power range match the planned IT block, including up to 1.1 MW per sidecar and the parallel option.
Eaton Year not stated
Use the curve of the selected UPS and battery configuration in runtime calculations.
Schneider Electric Year not stated
Make circuit type (3-phase or two-conductor), cos(phi) and conductor temperature explicit inputs to the cable voltage-drop calculation.
TÜV NORD 2026
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
U.S. EPA / ENERGY STAR 2024
Write ENERGY STAR Version 4.0 certification and the PSU efficiency steps (at 10% to 100% load points) into the server procurement specification; look especially at 10% and 20% load efficiency for redundant supplies that run lightly loaded.
U.S. EPA / ENERGY STAR 2017
Write the Version 2.0 thresholds into UPS procurement as a floor; for VFI units above 10,000 W compute the minimum from 0.0058 x ln(P) + 0.886 for the actual rating.
FEMA 2007
For site selection, look beyond the 100-year flood to the 500-year (0.2%) flood and the facility's occupancy category, and avoid flood hazard areas where possible.
FEMA 2014
At critical-facility data centers, place generators, ATS, fuel tanks and pumps above the greatest of BFE + 3 ft, DFE + 1 ft and 500-year elevation + 1 ft, and prefer elevation to dry floodproofing.
Schneider Electric 2015
Build the PUE calculator on an explicit load-classification table: each catalog component is IT, infrastructure, excluded or shared.
Schneider Electric 2014
Make the primary density inputs per rack: avgRackKw and peakRackKw per row or zone, default peak/avg 2
Vertiv 2022
Add to the UPS catalog an efficiency curve per mode (VFI/VI/VFD) at 25/50/75/100% load and a transferTimeMs per mode.
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