Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

kWh

Symbols

Bidirectional active-energy meter

A bidirectional meter records active energy in both directions on separate registers, usually labelled import and export. It is the normal meter at connection points with generation, batteries or solar, where energy flows to and from the network at different times of day.

Drawing use: SLD / Schematic
Application: Metering & protection
Reference family: IEC / Manufacturer

A distinction that matters

A bidirectional meter keeps separate import and export registers; a net register only keeps the difference.

Full reference

kWh

Symbols

Active-energy meter

An active-energy meter accumulates active power over time. The drawing identifies its voltage and current measurement point, while the register configuration defines import, export or net accumulation.

Drawing use: SLD / Schematic
Application: Metering & protection
Reference family: Manufacturer

A distinction that matters

Kilowatt-hours measure accumulated energy; kilowatts measure active power.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.