Symbols of transformers - Unifilar representation

Electrical Transformers Symbols
Single Line Representation

The electrical transformer is a component consisting of two or more coils coupled by magnetic induction. It is used to transfer electrical energy, and to increase or decrease the tension in an AC circuit, keeping the frequency.
The autotransformer has only one winding.

Electrical Transformers Symbols
Single Line Representation

Symbol Description Symbol Description
Voltage transformer symbol Voltage transformer
Two windings are shown
Generic symbol
  Voltage transformer symbol, single phase Voltage transformer
Single phase
Current transformer symbol Current transformer
Pulse transformer
  Current transformer symbol Current Transformer
Single-phase transformer with separate windings symbol Single-phase transformer with separate windings   Symbol of the current transformer with two cores with a secondary winding on each core Current transformer with two cores with a secondary winding on each core
Current transformer with three conductors symbol Current transformer with three conductors   Symbol of the current transformer with two secondary windings on a core Current transformer with two secondary windings on a core
Symbol of the dual current transformer with the same core Dual current transformer with the same core   Symbol transformer power outlet Transformer power outlet
Symbol of the single-phase transformer with a winding bypass intermediate Single-phase transformer with a winding bypass intermediate   Inductance symbol Inductance
Three-phase transformer with regulation of induction symbol Three-phase transformer with regulation of induction   Transformer with three windings symbol Transformer with three windings
Autotransformer symbol Autotransformer   Single-phase transformer coupling variable symbol Single-phase transformer coupling variable
Single phase autotransformer symbol Single phase autotransformer   Single phase autotransformer with voltage adjustable symbol Single phase autotransformer with voltage adjustable
Three phase auto transformer with star connections symbol Three phase auto transformer with star connections   Three-phase voltage transformer symbol Three-phase voltage transformer
Three-phase transformer with star / star connection symbol Three-phase transformer with star / star connection   Three-phase transformer with star / delta connection symbol Three-phase transformer with star / delta connection
Symbol of the three-phase transformer with connection star / delta Three-phase transformer with connection star / delta   Symbol of the three-phase transformer with connection star / zig zag and neutral output Three-phase transformer with connection star / zig zag and neutral output
Symbol of theThree-phase transformer with connection star / delta and step tap changer Three-phase transformer with connection star / delta and step tap changer      
More electrical transformer symbols
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