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What does this symbol mean?
Symbol on casing of isolation transformer
| Bob | 24/05/2023 19:46:49 |
| 51 forum posts 1 photos | What does this symbol indicate?
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| KWIL | 24/05/2023 20:17:34 |
| 3681 forum posts 70 photos | I am sure it shows what it says. Two identical windings, 1:1 ratio, Completely isolated for safety. In other words an isolation transformer. |
| Bob | 24/05/2023 20:59:08 |
| 51 forum posts 1 photos | I agree that the two overlapping circles with the the two downward pointing 'legs' represent an isolation transformer but what does the enclosing semicircle signify?
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| Bill Davies 2 | 24/05/2023 22:48:08 |
| 357 forum posts 13 photos | See: Isolating transformer symbols (IEC standards). Seems to be a slightly corrupted version of Pr01-029. Bill |
| Bob | 25/05/2023 07:15:55 |
| 51 forum posts 1 photos | Many thanks Bill. I have never come across these symbols before and they are not very intuitive. I guess the semicircle is meant to represent a hard hat that would be worn on a construction site. Bob
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| Robert Atkinson 2 | 26/05/2023 07:54:54 |
 1891 forum posts 37 photos | Typical IEC. Weird symbols the meaning of which is hidden in a expensive document. The linked document shows p proposed symbols, I wonder what they settled on. And no I'm not going to pay BSI £356 for EN 60417 to find out. Oh and that price is only for Part 2, Part 1 is an additional £356! Robert. |
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All Forum Topics > Workshop Tools and Tooling > What does this symbol mean?