PCS
Power converter / inverter
An identified interface converting electrical power between documented circuit forms.
SLD / Schematic
IEC · Q070104
Switch-disconnector function qualifier
This qualifier identifies combined switching and isolation in the associated representation.
IEC · Switch-disconnector function qualifier
Autodesk IEC-60617 Symbol Preview — Operating-device and function 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 · Q070104
What it represents
This qualifier identifies combined switching and isolation in the associated representation. The combined function tells the reader that switching and isolation belong to the associated device representation. It does not add an overcurrent trip function.
When the SLD is expanded into a control schematic, retain the device tag and show any auxiliary contacts or operating mechanism separately. Protective devices elsewhere in the circuit remain separate items.
How to read it
- Read it with the complete power device and its operating-state information.
- Switch-disconnector duty is different from automatic circuit-breaker interruption.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- Read it with the complete power device and its operating-state information.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
Switch-disconnector duty is different from automatic circuit-breaker interruption.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEC-60617 preview: Operating-device and function qualifiers
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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