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A significant change is due to be implemented in 2025 in the European electricity market: Prices will be set per...
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L2 current not available!?
Some smart meters simply do not report current on the L2 phase.In particular, this is the case for meters used on installations in Norway that have a so called IT installation, with 230V between phases and no neutral wire.
Up until firmware version 2.2.24 we calculated an estimate for L2 current on those meters, and presented that velus in the user interface.
However, we realized that in order to be relatively accurate, that estimate assumed identical load on the three phases was identical (or at least relatively evenly distributed). In real life, that assumption is usually very wrong. So we concluded that we cannot present that value in the user interface. The result is the illustration to this blog post: An indication in the user interface that the L2 current is "Not available".
We simply do not have enough information from the meter to calculate the third phase current from the two others + available voltages and power.
As far as we know, this applies to all smart meters used in 3-phase IT installations, which is mainly in use in older Norwegian installations.
In case anyone posses a "magic equation" to reliably calculate L2 current from available measurements, we are very interested in hearing from you!
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