CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
Symbols · CT TAP
Tapped-secondary current transformer
A tapped CT secondary provides alternative documented transformation ratios through different terminal combinations.
SLD / Schematic · CT TAP
What it represents
A tapped CT secondary provides alternative documented transformation ratios through different terminal combinations. The schematic must identify the selected tap and the treatment of unused terminals.
How to read it
- Determine the operational ratio from the connected tap pair rather than from the full nameplate range.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Label selected taps
- State operational ratio
- Reference unused-terminal instructions
A distinction that matters
A tapped winding selects a ratio; it does not create two independently loaded measurement windings.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Current transformer symbol variants
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
Indoor current and voltage transformers
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
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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