The spreadsheet pools the generators.
A 4N/3 plant does not. The engine loses the utility and each set in turn and reports what every remaining set actually carries — on the drawn paths, not on a sum.
Data center engineering simulation
Design the data center.
Prove it before you build it.
Build the single-line diagram, simulate failures and maintenance, assess redundancy, compare brownfield upgrades and generate engineering-ready reports — from one connected model. Built for consultants, designers and operators.
- SLD design
- Failure simulation
- Brownfield analysis
- Engineering reports
Portable Windows desktop application · no installer · 34 MB · 5-day free trial · runs locally, projects stay on your disk
SUCCESS
Every critical load carried.
UTIL-A lost · GEN-A on load in 10 s · UPS-A on battery 12 s · residual plant still concurrently maintainable · judged against target Tier III
IT load400 kW · 100 %
Sources liveUTIL-A · UTIL-B
On batterynone
Elapsedt = 0 s
Both utilities carry the 400 kW IT load, 50 % on each cord. Generators on standby, tie open.
Illustrative sequence in the application’s drawing language. Screenshots of the software itself are further down.
ONE MODEL, SIX ACTIVITIES
Nothing is rebuilt between design and report.
The single line you draw is the model the simulator runs, the analysis reads, the comparison diffs and the report prints. Change the drawing once and every result follows.
- 01DesignDraw the SLD and the floor. Devices carry their Q designations.
- 02SimulateRun the plant live: transfers, generator starts, UPS runtime.
- 03Stress testFail equipment, open breakers, take units out for maintenance.
- 04AnalyzePower flow on every run, redundancy on the drawn paths, capacity, thermal.
- 05CompareExisting against proposed, phase by phase, check by check.
- 06ReportDesign report, Sequence of Operation sheet, BOQ, schedules.
SLD · one model feeds every step — there is no export and import between them.
WHY IT EXISTS
Redundancy is a claim until something fails.
Load lists and capacity spreadsheets do not know how the plant is connected. The engine does: it walks the paths you drew and shows what each source carries when one of them is gone.
The drawing says 2N. The breakers may not.
Open any device, fail any component, and watch the transfer happen over time: which UPS goes to battery, which set starts, what is left on the bus after it settles.
Brownfield decisions get made on gut feel.
Existing and proposed are the same model. The same fault runs on both; the capacity left in every reused item and the Tier checks that change state are the case for the works.
CORE CAPABILITIES
Electrical and mechanical, in one drawing.
Power from the utility to the rack cord, cooling from the chiller to the aisle — modelled together, because a Tier check that ignores the pumps is not a Tier check.
Single-line designer
41 component types from MV intake to rack. Switchboards carry their devices as ways with IEC 81346 designations, frame and trip settings, spares included.
Q-A1 … Q-B53 numbered in one clickFailure and maintenance simulation
Utility loss, load-demand generator start, UPS runtime, static bypass, breaker operations and EPO — played over time on the live diagram.
Transfers timed, batteries drained, failed sets skippedPower flow and redundancy
The kW on every run: dual cords split 50/50 and the survivor takes 100 %, paralleled sets share the bus, a UPS draws its output over its efficiency. N+1 judged on the drawn paths.
Overload trips when a source is held above ratingFloor plan and thermal map
Rows, aisles, containment, perforated tiles and room units placed to scale, tied to the same components as the single line. See which rows lose containment first.
Continuous-cooling checks name the pumps, not only the CRAHsBrownfield comparison
Capture the facility as it stands, draw the works. Retained, removed and new are worked out by comparison; capacity, redundancy and topology checks are reported before and after, per phase.
Existing → proposed, from one modelCalculations, BOQ and reports
UPS, battery, generator and cooling sizing, cable sizing to IEC 60502-1 / IEC 60364, a bill of quantities counted from the model, and a document-numbered design report.
Every quantity read from the drawing, never typed twiceSTRAIGHT FROM THE SOFTWARE
Every screen here is the application running.
Unedited captures. Pick a workspace to see it at full size.
Draw the plant the way the consultant’s SLD reads
- Drag and connect utility, generators, switchboards, UPS, PDUs and racks.
- Every switchboard lists its ways: designation, device type, frame, trip setting.
- The model behind every result on this page.
FROM LIVE TENDERS
Six things engineers asked for on live tenders.
Each one was checked against a consultant’s actual drawing or sheet before it shipped. How, is in the validation section.
Devices numbered as on the drawing, IEC 81346, one click per side.
116 designations reproduced from one drawingCases played by the engine; every Q device ON, OFF, FAULT or ISOLATION once the plant settles.
36 / 36 cases matched on a consultant’s sheetThe kW on every run and the loading of every source, with overload trips.
Distributed-redundant plants judged by losing the utility and each set in turn.
3N/2 and 4N/3 without poolingSets start in priority order until capacity covers the load; a failed set is skipped.
Set-mounted breaker as a device of its ownChilled-water pumps on uninterruptible power, or a thermal store for the restart.
The pumps are named in the findingWHO USES IT
Built for the people who sign the drawing.
Consultants
Prove the concept before the tender closes.
- Validate a concept design against its target Tier, with the checks listed.
- Play the Sequence of Operation sheet instead of writing it by hand.
- Issue a design report and BOQ from the same model.
Designers and integrators
Compare topology options on numbers.
- 2N, N+1, distributed redundant — same load, same failure cases.
- Size UPS, batteries, generators, cooling and cables from the drawing.
- Hand over schedules that cannot drift from the SLD.
Operators and owners
Rehearse the failure before it happens.
- Drill utility loss, generator start and maintenance sweeps on the live model.
- Plan a brownfield upgrade without going dark: capacity, phases, retained plant.
- Keep the facility model on your own machine.
BROWNFIELD RENOVATION
Most data center work is not a new building.
A hall being extended, a plant being reused, a live facility taken from one Tier to the next without going dark. The software holds the facility as it stands beside the one you propose and reports the difference.
- Retained
- New
- Removed — deleting it from the drawing is what marks it for demolition
WORKED EXAMPLE · ILLUSTRATIVE FIGURES
Is there room on TR-1 for the new hall?
Existing facility
- TR-1 · 2500 kVA · 2000 kW usable
- 1400 kW legacy load
- Single UPS, no concurrent maintainability
Proposed
- New hall · +420 kW
- New SWGR-B and UPS-2
- UPS-1 removed
What the workspace reports
- Capacity
- TR-1 at 91 % — fits, nothing left for the next phase
- Retained plant
- 3 retained · 1 removed · 3 new
- Failure scenarios
- Utility loss run on both; the new hall holds on UPS-2
- Redundancy
- Legacy hall N → N; new hall N+1
- Topology gaps
- 2 Tier III checks fixed, 1 unchanged, 0 broken
- Scope and BOQ
- Counted from the diff; the report lists the phase result
- Phase 1SWGR-B and UPS-2 installed, legacy hall untouchedTier II checks
- Phase 2UPS-1 removed, legacy hall re-fed from SWGR-BTier III checks
Read the reference: taking an existing data center to Tier III →
STANDARDS AND TOPOLOGY ASSESSMENT
Topology assessment against configured Tier criteria.
Set a target Tier. The engine traces the topology you drew and lists the checks that pass, the ones that fail and where the gap is — N, N+1, 2N and distributed redundancy detected from the drawing, not from a box you ticked.
UPTIME INSTITUTE TIER TOPOLOGY · TARGET
Tier ITier IITier IIITier IV
Target Tier topology checks: concurrent maintainability, fault tolerance, continuous cooling, and the residual redundancy after each case in the Sequence of Operation.
ANSI/BICSI 002 AVAILABILITY CLASS
F0F1F2F3F4
Automated topology gap analysis across electrical, mechanical, telecommunications and fire subsystems; the weakest subsystem sets the class.
APPLICABLE CODES AND STANDARDS REGISTER
76 normative documents grouped by what they govern — grounding, batteries, fire, cabling — printed into the report as a register for sign-off. Included in the trial; printed only from the licensed edition.
76documents
14 subjects
14 subjects
ANSI/BICSIUptime InstituteNFPAIEEEANSI/TIAIECISO/IECASHRAECENELEC ENULICCASTM
ENGINEERING VALIDATION
How the engine is checked.
Real consultant drawings are reproduced in the software, their sequence-of-operation sheets are played by the engine, and the state of every device is compared with the sheet. Where they disagree, the engine is fixed or the discrepancy is documented.
36 / 36Sequence of Operation cases matched, device by device, on a consultant’s sheet for a live tender
116Q designations reproduced from one SLD, then used to run the sheet
2consultant single-line drawings from current projects rebuilt as drawn and kept as test cases
41infrastructure component types, MV intake to rack cord
76normative documents in the codes register
2,700randomised engine runs in the release test, no exceptions
- Reproducethe consultant’s SLD as drawn — every board, way and designation.
- Replayeach case on the sheet: which devices open, which components fail.
- Comparethe engine’s settled state with the sheet, device by device.
- Recordevery difference. Engine fixed, or the discrepancy documented in the release notes.
Client references and named case studies are published here as projects complete and clients agree to be named.
OUTPUTS
The documents come out of the model.
Nothing is typed twice. Change the drawing and every document below is regenerated from it.
- Design reportTopology, assumptions, calculations, findings — document-numbered, PDF
- Electrical Sequence of OperationEvery case, every Q device, printable sheet and Excel
- Bill of quantitiesCounted from the SLD and the floor plan
- Switchboard schedulesWay by way, with designations and settings
- Codes and standards register76 documents, by subject, for sign-off
- Renovation reportRetained, removed, new; capacity; checks before and after; phase results
- SLD exportThe drawing as an image, and case files other projects can import
LOCAL OPERATION
Your infrastructure model stays yours.
A facility’s single line is sensitive by nature. The software never asks you to upload it.
Runs locallyOne portable Windows executable. It starts a local service on your machine and opens its interface in your browser.
Works offlineNo internet connection is needed to design, simulate or report. The trial and the licensed edition both run with the network cable out.
Projects stored locallyProjects live in a database on your own disk. Back it up like any other file.
No cloud uploadNothing from your model is sent anywhere. The only thing that leaves your machine is the Machine ID you send us to get a key.
No SaaS dependencyNo account, no login, no server of ours that your work depends on. If we are offline, you are not.
Node-locked licenceThe key is issued for one computer and checked on that computer, offline. Changing computer? The replacement key is free.
GET IT
Two doors. Pick the one you need today.
Portable Windows desktop application. No installer required. Runs locally and opens its interface in your browser.
SELF-SERVICE
Five days with the core of the product
One project of your own for five days: draw the single line, fail anything in the simulator, lay out the floor and read the Tier verdict. Reports, export and the advanced workspaces come with the licence.
Download the free trialTALK TO AN ENGINEER
Request an engineering walkthrough
Thirty minutes on your own drawing with the engineer who built the software: what it will and will not tell you about your plant.
LICENSED EDITION
Get your licence key
The complete edition is sent with your key. Open it, copy the Machine ID it shows, send it over; the key comes back for that computer.
Send my Machine IDThe file is not yet code-signed, so Windows may warn about an unknown publisher on first run: choose More info → Run anyway.
LICENSING
One licence per computer. Runs offline.
A term, not a subscription: nothing renews on its own. Prices in USD.
01 · TRY IT
Trial
The core of the product for five days, on one project.
Free
No key · no account · 5 days from first launch
Download the free trial- Single-line designer and failure simulator
- Floor layout and thermal map
- Tier and Class verdict on your design
- Your project carries over to the licensed edition
- Sequence of operation, renovation, calculations, BOQ
- Detailed compliance checks and codes register
- Reports, printing and export · more than one project
MOST CHOSEN
02 · FOR WORKING ENGINEERS
Professional
Every feature, one computer, the engineer who built it on the other end of the line.
Card payment · key within one working day
Buy Professional- Everything in the trial, unrestricted and without a time limit
- Complete report, printable, no watermark
- Electrical Sequence of Operation, export and import
- Renovation: existing vs proposed, phase by phase
- Calculations and cable sizing to IEC 60502-1 / 60364
- Codes register, BOQ and switchboard schedules
- Free licence transfer if you change computer
03 · TEAMS AND INTEGRATORS
Company & Enterprise
Several computers, a perpetual term, or a licence shaped around how your practice works.
Custom
Quoted per seat · invoiced
- Seats
- Multi-seat, volume pricing per computer
- Term
- Annual, or perpetual with no renewal date
- Procurement
- Company invoice, purchase order, bank transfer
- Deployment
- Node-locked keys per machine, issued offline; no server of ours involved
- Support
- Priority response and priority on feature requests, from the engineer who built it
QUESTIONS
Before you download.
Is this an Uptime Institute Tier Certification?
No. The software is an independent engineering tool. It assesses the topology you draw against Tier criteria configured in the software and lists the checks and gaps. Certification is granted only by Uptime Institute; nothing here replaces it or any other formal review.
Does it need the internet?
No. Design, simulation, assessment and reports all run on your own machine. The licence key is checked offline against the computer’s Machine ID. The only connection you need is the one to download the file.
What do I install?
Nothing. It is one portable Windows executable (Windows 10 or 11, 64-bit). Double-click it, it starts a local service and opens its interface in your browser. Projects are kept in a database on your own disk.
Windows says “unknown publisher”.
The file is not yet code-signed, so Windows may warn about an unknown publisher on first run: choose More info → Run anyway. The file is the same one served from this site; if you would rather have it sent directly, ask.
What does the trial include, and what happens after five days?
The core of the product, on one project of your own, for five days from the first launch on that computer: the single-line designer, the failure simulator, the floor layout and thermal map, and the Tier and Class verdict. The sequence of operation, renovation, calculations, BOQ, the detailed compliance checks and codes register, reports, printing and export come with the licence — they are not in the trial file at all. When the five days are up the software shows your Machine ID and a Buy button; the projects you made stay on the computer and open in the licensed edition once the key is entered.
Can I move my licence to another computer?
Yes. Send the new Machine ID and the replacement key is issued free for the remainder of the term.
What comes out of it?
A design report (PDF), the Electrical Sequence of Operation sheet (print and Excel), a bill of quantities, switchboard schedules, the codes register, the renovation comparison and an SLD export. Case files can be moved between projects.
Who answers when I have a question?
The engineer who built the software, on WhatsApp or by email. There is no ticket queue.
NEXT STEP
Try it on your own drawing.
Download the trial and draw a facility you know. Or ask for a walkthrough and bring your SLD.
61 Ismail Kamel St., Helwan, Cairo, Egypt