Two coils facing each other across parallel lines, marking a transformer.
Also known as: Transformer schematic symbol, Two coils symbol, Isolation transformer symbol
Two coils drawn facing each other across a pair of lines mark a transformer. The lines are the shared iron core, and their presence is the point: the two circuits are coupled magnetically without being connected electrically.
Marks a transformer: two coils sharing a magnetic core, transferring alternating current between circuits and usually changing the voltage.
Contexts: Electrical equipment
Shows the two windings as inductor coils facing each other, with the pair of parallel lines between them representing the shared iron core.
Contexts: Electrical equipment
Shows that the two sides are not electrically connected — the gap between the coils is the isolation, which is the property safety-critical transformers are fitted for.
Contexts: Electrical equipment
Carries small dots beside one end of each winding where the relative phase matters, indicating which terminals rise in voltage together.
Contexts: Electrical equipment
Two sets of semicircular humps facing each other, separated by two short parallel vertical lines running between them.
Drawn as two inductor coils sharing a core.