CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
Symbols · Ah
Ampere-hour meter
An ampere-hour meter integrates current over time for a documented measurement purpose.
SLD / Schematic · Ah
What it represents
An ampere-hour meter integrates current over time for a documented measurement purpose. Battery circuits need direction, current-sensor scaling and any reset or retention conditions.
How to read it
- Do not infer battery state of charge directly from an unlabeled accumulated-current value.
- 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
- Identify current sensor
- State charge/discharge convention
- Reference reset and scaling
A distinction that matters
Ampere-hours and kilowatt-hours represent different measured quantities.
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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