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6.9.5. Load profiles
Load profiles are of interest to both the utility and the end customer as they can help determine which electricity
contract and tariff rates may be the most appropriate.
As well as analysis, load profile data can be used for billing purposes.
A load profile is a continuous record of an energy quantity taken over a preset period of time (the recording
interval). Each profile is recorded as an independent channel into one of the meter's two internal memory arrays
(LP1 & LP2).
The recording interval is programmable in discrete (sub multiples of 60) steps from 1 minute to 60 minutes and
applied as a common value across all profile channels in an array. It can be a different value from the demand
integration period (page 42) except when a load profile channel is configured with excess energy (see below).
Operating modes
Each load profile channel can operate in one of two modes:
• Cumulative
The energy quantity allocated to the load profile is cumulated over the recording interval and then stored in
the load profile array (cumulated unit-hours).
As this mode records energy consumption over the recording interval, only energy type quantities can be
allocated.
• Average
The energy quantity allocated to the load profile is cumulated over the recording interval and then
corresponding average power stored in the load profile array (cumulated unit-hours divided by the
integration period).
This mode can be used with all energy quantity types.
In addition, certain specific meter status and event information is also recorded as date-stamped data elements
in the load profile memory array, for example:
• clock setting
• daylight saving time (DST)
• external synchronisation
• power failure
• watchdog reset
All the measured energy (page 35) and certain instantaneous and calculated energy quantities recorded by the
meter are available for load profiling. Typically, active and reactive energy types are used but other energy types
and meter parameters can also provide useful profile data, such as:
• excess energy
• per phase Urms and Irms
• per phase and aggregate PF
• frequency, ambient temperature and alarm status
Load profile parameter summary
Parameter LP1 LP2
Number of load profile channels (max) 8 8
Capacity for the load profile array with a recording interval of 15 mins 148 days 35 days
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