GEN
Generator
An electrical generating source represented in a power-system drawing.
SLD / Schematic
Electrical symbols.
Explore electrical symbols, functional blocks and circuit arrangements for switchgear, switchrooms, substations, switchyards and microgrids. Detailed explanations, drawing notes, public sources and original SVG/DXF illustrations.
Microgrid systems
BAT
Battery
An electrochemical electrical source or storage element represented in a circuit.
SLD / Schematic
PCS
Power converter / inverter
An identified interface converting electrical power between documented circuit forms.
SLD / Schematic
G DC
DC generator
A DC generator converts mechanical input into a documented DC electrical output.
SLD / Schematic
G DC COMP
Compound-excited DC generator
A compound-excited DC generator uses documented series and shunt excitation components.
SLD / Schematic
G 3PH SYNC
Three-phase synchronous generator
A three-phase synchronous generator supplies a documented AC source associated with its mechanical prime mover and excitation system.
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G 3PH PM
Permanent-magnet synchronous generator
A permanent-magnet synchronous generator provides an AC source using a permanent magnetic excitation system.
SLD / Schematic
PSU AC-DC
AC-to-DC power supply
An AC/DC power supply converts a documented AC input to a DC output for control or auxiliary circuits.
SLD / Schematic
DC-DC
DC-to-DC converter
A DC/DC converter changes a documented DC input into another DC output.
SLD / Schematic
INV DC-AC
DC-to-AC inverter
A DC/AC inverter converts a documented DC supply into an AC output.
SLD / Schematic
UPS DC
DC uninterruptible power supply
A DC UPS maintains a documented DC load supply during a specified input interruption using an associated energy store.
SLD / Schematic
UPS AC
AC uninterruptible power supply
An AC UPS provides a documented AC load supply through its normal and backup operating arrangements.
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Read the drawing, not just the mark
Small details. Different meanings.
Understand symbols, equipment tags and function numbers—and know when a generic object needs a manufacturer drawing.
In plain English
What do electrical symbols tell you?
Electrical symbols are shorthand for equipment, functions and connections. They let you follow how a circuit works without drawing every physical detail.
A simple example
On a microgrid single-line diagram, a current-transformer symbol marks a measurement point and a breaker symbol marks where a circuit can be disconnected. Their labels identify the actual equipment.
What the drawings help you do
Follow the connected lines to trace power or control signals. Use the project legend to interpret symbols and the selected manufacturer's drawings for dimensions and terminal connections.
- Single-line diagram
- A simplified power-system drawing that often uses one line to represent a three-phase circuit.
- Legend
- The key explaining a drawing's symbols and labels.