Metering Insights

Electrical Power Supply Systems

Usually the power supply systems are named with single phase, three-phase three wire or three-phase four-wire. The German VDE and the IEC60364-1 have unified the supply systems based on grounding.

Maximum Current for Energy Meters

Energy meters have certain characteristics, including maximum current. It is the basis for all types of meter tests.

The TID Clock is ticking – Historical Context Before the 2024 Rollover

If you are using STS prepayment energy meters you might remember that updates are required for the key management centre (KMC), the security modules and the vending software.

Markings on the Case of Energy Meters

The IEC 62052-11 Edition 2 has introduced some changes for the meter marking and documentation. Today we cover the mandatory content of the nameplate for IEC meters.

Pairing of a User Interface Unit with a Meter

A user interface unit (UIU) is a remote access terminal for STS prepayment meters. The device is placed inside the users premisses while the energy meter is mounted outside and...

Swapping Phase and Neutral

Will an electronic energy meter measure accurate when I invert phase and neutral during installation? This question came up recently.

Ring Wave Immunity Test

The IEC 62052-11 Ed.2 comes with a lot of changes for meter type testing. Another new introduced test for electromagnetic compatibility (EMC) is the ring wave immunity test.

The Uttar Pradesh Smart Meter Shutdown

A sudden shutdown of 150,000 smart meters happened recently in the Uttar Pradesh province, India.

Electrostatic Discharge Test for Energy Meters

Sometimes it happens that you touch the door knob and you get an electrical shock. It's not dramatically for your body but an unpleasant feeling.

Don't touch anything!

In your utility laboratory and for your on-site workers you take of course care for a proper training on the job and especially for personal safety.

The Stability of IEC Standards

Meter manufacturers, utility laboratories and type testing institutes have planning security until year 2025.

The Critical Change Value

The critical change value indicates the maximum amount of change allowed in the meter's energy registers during disturbance tests without any current flowing in the meter's current circuits.