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

Excess-energy meter

An excess-energy meter records energy only for the part of the load above a set power level. It was used for tariffs that penalised consumption beyond an agreed capacity, and the same idea appears in modern meters as threshold registers.

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

A distinction that matters

An excess-energy meter counts only energy above a threshold; a maximum-demand meter records the highest average power.

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.