# Energy meter with maximum-demand indicator

Canonical URL: https://eloragrid.ai/symbols/maximum-demand-energy-meter
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: kWh/MD
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

Energy meter that also records the highest average power over a fixed demand interval for demand charging.

## In plain English

### What does Energy meter with maximum-demand indicator mean?

This meter totalises energy and also keeps the maximum average power reached in any demand interval, such as 15 or 30 minutes. Large supplies are often billed partly on that maximum demand, so the meter form appears on the supply single-line diagram with the demand interval stated nearby.

### A simple example

The demand register is reset periodically, usually at the end of a billing period. The symbol does not show the interval, whether it uses fixed blocks or a sliding window, or how reset is performed, and those settings change the recorded value.

### What the drawings help you do

Find the demand interval and window type. Check how and when the demand register is reset. A maximum-demand meter records peak averaged power plus energy; a maximum-demand indicator shows only the peak value.

### This particular reference

Energy meter that also records the highest average power over a fixed demand interval for demand charging. A maximum-demand meter records peak averaged power plus energy; a maximum-demand indicator shows only the peak value.

### Terms

- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [Power and energy measurement quantities](https://www.se.com/ph/en/faqs/FA343278/)
- [PowerLogic ION9000 user manual](https://www.se.com/us/en/download/document/26719674/)


## What it represents

This meter totalises energy and also keeps the maximum average power reached in any demand interval, such as 15 or 30 minutes. Large supplies are often billed partly on that maximum demand, so the meter form appears on the supply single-line diagram with the demand interval stated nearby.
The demand register is reset periodically, usually at the end of a billing period. The symbol does not show the interval, whether it uses fixed blocks or a sliding window, or how reset is performed, and those settings change the recorded value.

## How to read it

- Find the demand interval and window type.
- Check how and when the demand register is reset.

## Information to show or reference

- State demand interval
- Show reset arrangement
- Reference tariff requirement

## Important distinction

A maximum-demand meter records peak averaged power plus energy; a maximum-demand indicator shows only the peak value.

## Facts

- Registers: Energy plus maximum averaged demand
- Key setting: Demand interval
- Preview: Independent educational concept; consult the applicable standard and project legend for the exact graphic

## Public references

- [Power and energy measurement quantities](https://www.se.com/ph/en/faqs/FA343278/) — Schneider Electric. Public explanation of energy and power measurement quantities used by meters.
- [PowerLogic ION9000 user manual](https://www.se.com/us/en/download/document/26719674/) — Schneider Electric. Public meter manual describing measurement, logging and recording features of a revenue and power-quality meter.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.