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Sorry for my English.
I write with the help of a translator from google.
Please help determine what standards of a graphic symbol electric (number of the standard paragraph, the part number)?
In one book in Russia were given 4 image transformer (for drawing in the U.S. and Europe).
Аnd did not specify what kind of where taken.
Simply written: IEC (DIN) and IEEE (ANSI)
After learning standards, I thought:
(a) and (b) - IEC 60617
(c) - IEEE 315
Question: Which standards use (d) picture?
In general, I met this image more than once
Here is an example I only found today
site http://www.abacom-online.de/uk/html/splan.html
program SPLAN 7 demo
screenshot of the program
as we see again used this image
in general it is a matter of principle to figure out how this symbol electric :)
I was told that in 1980 ~ such drawing employed in Germany and now in China.
Admittedly this was associated with the use of ASCII artwork "graphics"
Well, when CAD has evolved and it symbol "crossed over" into a modern look
(ASCII artwork "graphics" --> vector graphics)
Help me find a figure emerged from the character and what the normative document is written?
I write with the help of a translator from google.
Please help determine what standards of a graphic symbol electric (number of the standard paragraph, the part number)?
In one book in Russia were given 4 image transformer (for drawing in the U.S. and Europe).
Аnd did not specify what kind of where taken.
Simply written: IEC (DIN) and IEEE (ANSI)
After learning standards, I thought:
(a) and (b) - IEC 60617
(c) - IEEE 315
Question: Which standards use (d) picture?
In general, I met this image more than once
Here is an example I only found today
site http://www.abacom-online.de/uk/html/splan.html
program SPLAN 7 demo
screenshot of the program
as we see again used this image
in general it is a matter of principle to figure out how this symbol electric :)
I was told that in 1980 ~ such drawing employed in Germany and now in China.
Admittedly this was associated with the use of ASCII artwork "graphics"
Well, when CAD has evolved and it symbol "crossed over" into a modern look
(ASCII artwork "graphics" --> vector graphics)
Help me find a figure emerged from the character and what the normative document is written?