ALL ARTICLES CATEGORIZED IN: CATEGORY: METERING BLOG

Electrical Energy meters are sealed to detect possible manipulations. The utility field workers check the meter installations regular.

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.

There are several ways to predict the reliability of an energy meter. The IEC provides a series of standards related to reliability tests or evaluations.

When you are generating power by solar or wind, you might produce more energy than you actually need.

What will be the recorded demand if a constant load of 1 kW is applied through a 30 minute demand meter ?

A clear tamper token is required to unlock a STS meter showing the tamper sign. Only the local power company can issue this token code.

A latching relay keeps its contact position indefinitely without power applied to the coil.