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Recording instrument general symbol
General square form for an instrument that keeps a time record of a quantity rather than just displaying it.
SLD / Schematic
Symbols · V
Recording voltmeter
Recording instrument that keeps a time record of voltage, drawn as a square marked V.
In plain English
What does Recording voltmeter mean?
A recording voltmeter stores voltage against time so that sags, swells and slow variations can be reviewed later. On single-line diagrams it is drawn off a VT secondary at a busbar or supply point, and on schematics it is wired across the VT circuit like an indicating voltmeter.
A simple example
The symbol does not say how fast the recorder samples. A slow recorder logging averages every few minutes cannot show short dips, so the recording interval must be checked against what the record will be used to investigate.
What the drawings help you do
Identify the VT feeding the recorder. Check the recording interval against the events of interest. A recording voltmeter stores a time record; an ordinary voltmeter shows only the present voltage.
This particular reference
Recording instrument that keeps a time record of voltage, drawn as a square marked V. A recording voltmeter stores a time record; an ordinary voltmeter shows only the present voltage.
- Terminal
- An identified point where a conductor connects.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: IEC graphical symbols for diagrams
SLD / Schematic · V
What it represents
A recording voltmeter stores voltage against time so that sags, swells and slow variations can be reviewed later. On single-line diagrams it is drawn off a VT secondary at a busbar or supply point, and on schematics it is wired across the VT circuit like an indicating voltmeter.
The symbol does not say how fast the recorder samples. A slow recorder logging averages every few minutes cannot show short dips, so the recording interval must be checked against what the record will be used to investigate.
How to read it
- Identify the VT feeding the recorder.
- Check the recording interval against the events of interest.
Information to show or reference
- Show VT ratio
- State recording interval
- Reference data retrieval
A distinction that matters
A recording voltmeter stores a time record; an ordinary voltmeter shows only the present voltage.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
IEC graphical symbols for diagrams
IEC context for graphical symbols used in diagrams; no IEC graphic is reproduced.
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.
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