kWh
Active-energy meter
An active-energy meter accumulates active power over time.
SLD / Schematic
Symbols · kWh>
Excess-energy meter
Integrating meter that counts only the energy taken while power is above a set threshold.
In plain English
What does Excess-energy meter mean?
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.
A simple example
The symbol identifies the excess function but not the threshold, which is a contractual value that must be written beside the meter. Without that value the register cannot be interpreted or checked.
What the drawings help you do
Find the stated power threshold. Check the register is read with the main energy register. An excess-energy meter counts only energy above a threshold; a maximum-demand meter records the highest average power.
This particular reference
Integrating meter that counts only the energy taken while power is above a set threshold. An excess-energy meter counts only energy above a threshold; a maximum-demand meter records the highest average power.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: IEC graphical symbols for diagrams · Power and energy measurement quantities
SLD / Schematic · kWh>
What it represents
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.
The symbol identifies the excess function but not the threshold, which is a contractual value that must be written beside the meter. Without that value the register cannot be interpreted or checked.
How to read it
- Find the stated power threshold.
- Check the register is read with the main energy register.
Information to show or reference
- State threshold power
- Reference tariff clause
- Show measuring inputs
A distinction that matters
An excess-energy meter counts only energy above a threshold; a maximum-demand meter records the highest average power.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
IEC graphical symbols for diagrams
IEC context for graphical symbols used in diagrams; no IEC graphic is reproduced.
Power and energy measurement quantities
Public explanation of energy and power measurement quantities used by meters.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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