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Tools/Substation diagram maker

Substation diagram maker.

Create a substation diagram by describing the voltage levels, utility source, switching equipment, transformer, buses, protection, and outgoing feeders. The result is a single-line view of the power path and rated equipment.

Single-line DiagramEnter to send

Free account, no card · Export SVG, PNG or PDF

See it work

Substation diagram examples.

Same tool, four requests. Every drawing below is a real render.

What you type
Draw a 33 kV to 11 kV primary substation single line diagram with a line disconnector, metering CT, 1250 A 33 kV VCB, 20 MVA transformer, 11 kV incomer VCB, transformer differential relay, and three 11 kV outgoing feeders.
Then tryAdd a second 20 MVA transformer bank.Add a bus sectionalizer between two 11 kV bus sections.
Single-line diagram: 33 kV to 11 kV primary substation
Single-line diagram · IEEE Std 315 + ANSI device numbering · schematex-sld

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The drawing

What a substation diagram is.

A substation diagram is usually a single-line diagram that represents a three-phase power system with one line. It shows the principal equipment and the direction of power flow without drawing each phase conductor.

Engineers use it to communicate how sources, transformers, buses, breakers, protection, and feeders are arranged. Ratings and voltage levels make the system scope readable during design and review.

Standard
IEEE Std 315 + ANSI device numbering
Engine
schematex-sld
Editable
Double-click text, drag nodes
Export
SVG · PNG · PDF
Single-line diagram: What a substation diagram is
Who uses it

Who uses substation diagrams.

Single-line diagram: Power engineersPower engineers

Review a primary substation arrangement from the grid incomer through the transformer to the outgoing feeders.

Single-line diagram: Facility engineersFacility engineers

Document an indoor distribution substation and its lighting, power, and HVAC feeder paths.

Single-line diagram: Energy project teamsEnergy project teams

Explain the transformer and intertie arrangement for a battery storage connection.

How it works

How to make a substation diagram in three steps.

01

Describe it

One paragraph is enough to start.

“Draw a 33 kV to 11 kV primary substation single line diagram with a line disconnector, metering CT, 1250 A 33 kV VCB, 20 MVA transformer, 11 kV incomer VCB, transformer differential relay, and three 11 kV outgoing feeders.”
02

See the drawing

Drawn by the right engine.

Single-line diagram: 33 kV to 11 kV primary substation
03

Say what changes

Every edit keeps a version.

Add a second 20 MVA transformer bank.
V2 · DRAWN FROM V1, NOTHING RETYPED
FAQ

Common questions

What is a substation single-line diagram?

It is a simplified drawing of a three-phase substation that shows major equipment and power connections as one line.

What equipment belongs on a substation diagram?

Typical elements include the utility source, switches, breakers, transformers, buses, protection devices, and feeders.

Why are voltage and ratings shown?

They identify the operating level and capacity of the equipment represented.

Is a single-line diagram a construction drawing?

It describes the power-system arrangement. Detailed construction documents also need the applicable engineering, protection, and installation information.

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Create a substation diagram.

Free account, no card. Describe the source, voltage levels, transformer, and feeders.

Open the editor