Power topology diagrams · Industrial power streams

Import your cable schedule. PowerTopology works out the topology.

Create electrical power topology diagrams directly in your browser. Import your existing data, arrange the equipment, connect the feeders and understand the system from one drawing.

Nothing is uploaded to the cloud. Your drawings stay in your browser.

Open the studio See how it works

No account required
Saved locally in your browser
Works offline
Free up to 30 equipment items

plant-a-main-intake Rev B Feeder Checks (3) Status

Transformer TX-01

ENERGISED

Tag

TX-01

Rating

2000kVA

Voltage

11kV/400V

Room

SUB-A

Downstream load1 482 kW

Loading86% of 2000kVA

Incoming feeders1

Outgoing ways4

42 equipment · 57 feeders · 1 840 kW 2 without supply 100%

Product

One topology. Everything connected.

PowerTopology keeps the drawing, equipment data, feeders and cable schedule together. Change the topology once and the information stays in sync.

Arrange

Place equipment on voltage levels and PowerTopology keeps the drawing organised.

Check

Find unsupplied equipment, overloaded equipment, duplicate tags and other issues directly on the drawing.

Understand

Trace where equipment is supplied from and see what happens when a source is lost.

Issue

Export the drawing and its engineering data as PDF, SVG, PNG, XLSX, CSV or JSON.

Energisation

See what's live.

Mark equipment as energised, de-energised, isolated or faulty. PowerTopology uses the topology to show what is affected downstream.

If a source is de-energised, PowerTopology follows the topology and shows which downstream equipment loses supply. Dual-fed and generator-backed equipment remains supplied when an alternative source is available.

The status you set stays yours — downstream items are shown as De-energised — no supply, not restamped.
Cable installation is tracked separately: not pulled, pulled, terminated, tested, energised.
Each status records who set it and when.

Properties Checks Status DB-02 off

Supplied

Set off

No supply

Set by the engineer

DB-02 DE-ENERGISED · 14 Aug · rk

Follows from the topology

CH-02NO SUPPLY

FCU-11NO SUPPLY

AHU-03NO SUPPLY

RACK-ASUPPLIED VIA UPS-01

Drawing and data

Drawing and schedules stay together

Your topology, equipment register and cable schedule use the same project data.

Export the drawing as SVG, PNG or PDF, or export the engineering data as XLSX, CSV or JSON.

Import a spreadsheet with an equipment sheet and a cable or feeder sheet to build the drawing.
Revisions, title block and legend on the sheet.
Merging an external cable schedule into an existing drawing arrives with Pro.

Cable schedule Equipment register 57 feeders

Feeder	From	To	Cable	Breaker	Status
F-101	MSB-01	DB-01	4C×95	250A	TESTED
F-102	MSB-01	MCC-01	4C×185	400A	TERMINATED
F-103	MSB-01	DB-02	4C×70	160A	PULLED
F-104	MSB-01	UPS-01	4C×120	315A	ENERGISED
F-201	MCC-01	MTR-14	4C×25	100A	NOT PULLED

SVGPNGPDF XLSXCSVJSON

Features

Equipment catalogue

Switchgear, transformers, UPS, generators, motors, chillers and more.

Automatic topology

Place equipment and feeders on the drawing. Levels, rows and connections stay organised.

Energisation model

Switch off a source and see which downstream equipment loses supply.

Checks

Find topology and engineering issues directly on the sheet.

Cable schedules PRO · PLANNED

Merge an engineering cable schedule into an existing drawing. Available with the Pro release. Today, a workbook with an equipment sheet and a cable sheet builds a drawing from scratch.

Exports

PDF, SVG, PNG, XLSX, CSV and JSON.

Getting started

How it works

Open the studio

Start blank, use a template or import an existing project.

Build the topology

Place equipment and connect feeders.

Check the system

Trace supplies, review checks and see what happens when a source is lost.

Issue the drawing

Export the drawing and engineering data in the format you need.

Use cases

Who uses PowerTopology

Design & consulting engineers

Sketch distribution options, check loading and trace the supply path before issuing a design.

Commissioning & handover

Track energisation and cable installation against the actual topology.

Data centres & critical facilities

Show the complete electrical topology in one drawing and test what happens when a source is lost. The same topology is used to understand redundancy and downstream impact.

Maintenance & operations

Understand what feeds an item and what will be affected before an isolation.

Local-first

Runs in your browser

Your drawings are saved locally in your browser. There is no upload step and nothing needs to be stored on a project server.

Autosave
Works offline
Export your project as JSON
Share a drawing without giving access to your original

Drawings in this browser 4 saved

plant-a-main-intake 42 items · saved just now

mcc-3-refit 18 items · 2 h ago

dc-hall-2-ups-block 30 items · yesterday

New drawing Import Export JSON Install app

Pricing

Plans

Free

Everything needed to draw and check a small distribution.

£0

Up to 30 equipment items per drawing
Energisation model
Checks and topology tracing
Equipment status
SVG, PNG, PDF, XLSX, CSV and JSON export
Unlimited drawings saved locally

Open the studio

Pro

Designed for larger topologies and faster commissioning.

Pricing not published yet

Unlimited equipment
Cable schedule import
Rapid status assignment
Status filtering

Tell me when Pro is available

Team

Shared projects for teams working on the same site.

Coming later

Everything in Pro
Shared projects

Free drawings stay free. The Free plan supports up to 30 equipment items per drawing. Nothing is deleted when you reach the limit.

Get started

Start with a blank sheet.

No sign-up required. Import a cable schedule, place some equipment and see how the topology comes together.

Open the studio See how it works