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

kVAh

Symbols

Apparent-energy meter

An apparent-energy meter totalises volt-amperes over time. Some network tariffs and demand charges are based on kVA, so this register appears on supply-point single-line diagrams beside the kWh and kvarh registers of the revenue meter.

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

A distinction that matters

A kVAh meter totalises apparent energy; a kWh meter totalises only the active part.

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.