# Electric Current Symbols

The **electrical currents** are movements of electric charges (electrons) through a medium. The electrical current can be driving or alternating or convention. His unit is the ampere and is measured by the ammeter.

Symbol | Description | Symbol | Description | |
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Positive polarity | Negative polarity | |||

Direct current, DC | Direct current, DC | |||

Direct current, DC | Alternate current, AC Low frequency AC |
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Mixed current Rectified current |
Mixed current Rectified current |
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Universal equipment Operation with direct current and alternating current DC / AC |
Middle frequency, alternate current | |||

High frequency, alternate current | Converting DC to DC DC / DC |
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Converting DC to AC DC / AC inverter / undulator |
Converting AC to AC AC / AC |
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Converting AC to DC AC / DC Rectifier |
Alternate current - AC e.g. frequency: 50Hz |
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Neutral | ||||

## Symbols Three-phase Connections |
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Three-phasic current at a frequency of 50Hz | Phases R/S/T | |||

Three-phase Wye connection |
Three-phase Delta connection |
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## Symbols of power converters |