CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
Symbols · A
Ammeter
An ammeter indicates current from a direct or instrument-transformed measurement circuit.
SLD / Schematic · A
What it represents
An ammeter indicates current from a direct or instrument-transformed measurement circuit. Its schematic must identify the actual current path and any CT secondary circuit.
How to read it
- Distinguish the meter's current measurement terminals from its auxiliary supply.
- 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
- State direct or CT measurement
- Record operational ratio
- Identify current circuit terminals
A distinction that matters
An ammeter is an indication device, not an overcurrent protective function.
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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