Safety isolating transformer
A shield with a flat top and pointed bottom containing two overlapping circles stacked vertically, with a short horizontal line across where they overlap. · also called “SELV transformer”, “safety isolating transformer”, “safety transformer”, “shield transformer symbol”
What the Safety isolating transformer symbol means
Contains a safety isolating transformer
The two overlapping circles stand for the transformer's two windings and the shield for safety isolation: the unit is a safety isolating transformer, listed under EN 60742, with its variants under EN 61558-2-6. Its low-voltage output winding is separated from the mains input by safety insulation. Variants add a small box underneath (short-circuit-proof), two short legs (not short-circuit-proof) or a letter F (self-protecting).
Source · Official website Noratel transformer symbols and standards reference sheet · checked
Where it appears
- EN 61558—This meaning
Questions about the Safety isolating transformer symbol
- What does the Safety isolating transformer symbol mean?
- The two overlapping circles stand for the transformer's two windings and the shield for safety isolation: the unit is a safety isolating transformer, listed under EN 60742, with its variants under EN 61558-2-6. Its low-voltage output winding is separated from the mains input by safety insulation. Variants add a small box underneath (short-circuit-proof), two short legs (not short-circuit-proof) or a letter F (self-protecting).
- What does the Safety isolating transformer symbol look like?
- A shield with a flat top and pointed bottom containing two overlapping circles stacked vertically, with a short horizontal line across where they overlap. It is also called “SELV transformer”, “safety isolating transformer”, “safety transformer” and “shield transformer symbol”.
- Which standard defines the Safety isolating transformer symbol?
- It follows EN 61558.
Checked against the source · · How we verify
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