A voltage swell is a surge (increase) of voltage above 110 % of the rms magnitude in your power grid. The duration can be between ½ cycle and one minute. (EN 50160)
Sometimes it’s also referred to voltage sag (IEEE term). The meaning is the same. This article explains the power quality event logging inside of smart meters.
The First Breath Push notification is sent to the head end system (HES) as soon as the meter is powered up.
A electronic energy meter with communication via DLMS can be configured to send Push messages.
Usually a meter acts as a server.
Smart meters can generate a Push message in case of power fail. This event is called Last Gasp.
The optical port is for local communication with energy meters. With suitable software and an optical reading head you can access to the meter for reading and writing certain parameters.
Now meter testing is much more comfortable. Actually you only need to put the meters on the rack. For testing big quantities of meters a robot can also do the job.
But what happens inside?
In the past without any electronics a accuracy test was really challenging. You needed a voltage/current source with a high stability, calibrated wattmeters and a calibrated stop-watch.
Each energy meter used for billing must have a test output. An optical indication is mandatory. Beside this the meter can also have electrical test outputs.
We have a nice three phase power supply in our home, but where does it come from? And why does the waveform has a sine shape?