Metering Dynamics has created the following glossary of terms and acronyms commonly used in the metering and electricity industry for your reference.

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AEMO – Australian Energy Market Operator

The Australian Energy Market Operator (AEMO) operates the National Electricity Market (NEM) as well as the retail and wholesale gas markets of south eastern Australia. In Queensland the Australian Energy Market Operator (AEMO) was previously known as The National Electricity Market Management Company (NEMMCO).

Advanced Metering Infrastructure

The implementation of advanced meters which are capable of collecting interval data and remotely communicate with meter data agencies, either on a predefined schedule or an ad hoc basis. Advanced Metering Infrastructure is currently rolling out across Australia also known as Smart Metering. The Advanced Metering Infrastructure will allow electricity to be charged according to demand based tariffs.


An amp is a unit used to define the rate of flow of electrical current. High currents require a wire with a larger diameter to minimise losses which cause cable temperature rise.

AMR – Automated Meter Reading

The use of automated data loggers connected to utility/energy meters to store and send meter readings remotely without the need to visit a site and manually read a meter (Also see ‘Remote Metering’).

Bulk Energy Supply

Bulk supply relates to when building management purchases energy for the whole building at a lower commercial rate and on sells to individual accounts within their building.

Change Over Switch

Changes the revenue metering from one supply feed point to a standby supply feed point.


A commercial electricity customer within a certain usage bracket (Type 1-4 for example)

Current Transformer

A current transformer converts the current flowing in the consumer’s mains to a level suitable for a meter. The current transformer has errors that have been measured and can be applied to calibrate the meter.

Cyclic Data

Meter data which is collected in re-occurring sequences – for example on a quarterly basis

Dumb Meter

A traditional meter which only displays basic energy usage information for face reads by walkers, typically every quarter. No other data features available, basic functionality only.

EMP – Energy Management Platform

Metering Dynamics integrated software program and data delivery system specifically designed to help you manage energy at multiple geographically dispersed facilities with diverse energy consumption profiles. EMP Multi Plus enables the collection of data to make compliance reporting simple.

FRC -Full Retail Contestability

Provides all customers with the ability to choose their electricity and gas providers.


Harmonics relates to the distortion of the mains power wave-form. Can cause heating of motors and problems in electronic equipment.

Interval Data

Interval data is meter data which is collected in defined intervals – typically every 15 or 30 minutes.


InfoDynamics is Metering Dynamics’ intuitive online data management and information reporting business tool that empowers you with answers to make informed management decisions regarding electricity, gas and water consumption.


Kilovolt amp. The power which appears to flow in the wires but may not all be converted into useful work. It is also a unit of measure, used to rate electrical equipment.


Kilo volt amp reactive hours. A measure of energy supplied but not converted into work.


Kilowatt hour. A standard unit of electrical energy.

Load Profile

A graph of a customer’s energy consumption with respect to time. Energy consumption is normally recorded and displayed in half hour periods.

MDA – Meter Data Agency

An MDA is an agent of AEMO in charge of consumption reading and processing of contestable customers in the market.

MDP – Meter Data Provider

AEMO accredited organisations authorised to provide meter data in the National Electricity Market (NEM)

MP – Meter Provider

A Meter Provider provides the design, installation and maintenance of metering schemes including communications equipment of a National Electricity market customer, as defined in the National Electricity Code (NEC).

Multi Utility Metering

The measuring of multiple utilities such as gas, electricity, hot/cold/waste water, temperature, humidity and more.


The National Association of Testing Authorities is a laboratory accreditation organisation that evaluates and audits the capability and technical competence of accredited laboratories.


The National Electricity Code defines the rules for wholesale electricity trading and access to electricity networks.


The National Electricity Code Administrator Limited that will supervise, administer and enforce the National Electricity Code.

NMI – National Meter Identifier

The National Meter Identifier is a unique number used to identify the meter on your premises, you will find this number on your electricity bill.

Pattern Approved

Examination of the pattern (design) of a measuring instrument against national or international specifications. In Australia Pattern Approval is obtained through the National Measurement Institute.

Power Factor

Power factor is the ratio of active power (watts) to apparent power (VA). Power Factor has a value somewhere between zero and one. The distribution utility has to provide equipment that will carry Amps, and if the Power Factor is poor (less than about 0.9), the distribution network is inefficient. This inefficiency is passed onto the customer as higher charges.

Private Metering

Meters operated by private ‘non utility’ operators to bill tenants or to monitor energy consumption of a particular process.


By mapping energy usage over a set period of time you can define an energy profile showing peaks and troughs of usage.

Remote Metering

Reading a meter from a remote location. The meter or integrated ancillary equipment must be capable of data logging (storage) and electronic interrogation.

Revenue Metering

Used to bill a customer for energy consumption. The revenue owed to the retailer, body corporate or other supplier is calculated from revenue metering.

Smart Meter

This is a term for a general class of meter which will not only measure kilowatt hours but also ‘quality of supply’ functions. It is capable of being read remotely.

Sub Metering

A sub meter is a meter connected after the main revenue meter. It may or may not be a revenue meter and is typically used for information monitoring purposes. An example of a commom use for a sub meter is to measure the electricity consumption of an air conditioning unit.


High voltage spikes superimposed on the mains power. They can cause damage to sensitive electronic equipment.


The unit of electrical pressure. High voltage requires more insulation and clearances than low voltage.

Voltage Sags and Swells

The mains voltage rises (swells) and falls (sags) depending on the load on the supply network and the distance the customer is from a system voltage regulator (eg substation transformer) and the design of the supply network.

Voltage Transformer

Converts the supply voltage to a voltage level suitable for a meter. The voltage transformer has errors that have been measured and can be applied to calibrate the meter.


Unit of power. The ‘watt’ in mains power is calculated by multiplying together Volts, Amps and Power Factor.