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Three-phase motor
An electrical motor load connected to its switching and protective equipment.
SLD / Schematic
IEC · Q020201
Direct-current supply qualifier
A direct-current qualifier identifies the supply character associated with a circuit or device.
IEC · Direct-current supply qualifier
Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · Q020201
What it represents
A direct-current qualifier identifies the supply character associated with a circuit or device.
Show voltage, polarity and circuit reference separately.
A DC indication does not establish whether the source is a battery, rectifier or converter.
How to read it
- Show voltage, polarity and circuit reference separately.
- A DC indication does not establish whether the source is a battery, rectifier or converter.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- Show voltage, polarity and circuit reference separately.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
A DC indication does not establish whether the source is a battery, rectifier or converter.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Winding arrangements and AC/DC indications
Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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