CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
Symbols · DELTA V
Differential voltmeter
A differential voltmeter indicates a difference between documented voltage inputs.
SLD / Schematic · DELTA V
What it represents
A differential voltmeter indicates a difference between documented voltage inputs. Its reference and compared circuits must be identifiable so the indicated difference has a defined meaning.
How to read it
- Verify the input connection arrangement against the actual instrument diagram.
- 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 both compared inputs
- State polarity/reference
- Reference measurement range
A distinction that matters
A differential voltage indicator is different from a transformer differential protection 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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