CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
IEC · Q021701
Presumed-fault-location indication
This indication marks the presumed location of a fault or failure in a diagnostic diagram.
IEC · Presumed-fault-location indication
Autodesk IEC-60617 Symbol Preview — Fault-location and insulation-failure indications; 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.
Schematic · Q021701
What it represents
This indication marks the presumed location of a fault or failure in a diagnostic diagram.
State the evidence and uncertainty associated with the marked location.
A presumed fault location is not the same as a confirmed equipment defect.
How to read it
- State the evidence and uncertainty associated with the marked location.
- A presumed fault location is not the same as a confirmed equipment defect.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- State the evidence and uncertainty associated with the marked location.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
A presumed fault location is not the same as a confirmed equipment defect.
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: Fault-location and insulation-failure 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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