CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
Symbols · RPM
Tachometer
A tachometer indicates rotational speed from its documented sensor or electrical input.
SLD / Schematic · RPM
What it represents
A tachometer indicates rotational speed from its documented sensor or electrical input. Generator and motor auxiliary schematics need the relationship between the speed sensor and the indicated machine.
How to read it
- Identify pulses per revolution or sensor scaling in the instrument configuration.
- 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
- Link machine and sensor
- Reference input scaling
- State displayed speed units
A distinction that matters
A tachometer reports speed; a frequency meter reports electrical frequency.
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: Instrumentation and sensors
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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