Being World-Class Energy Services Provider

Waveform Sampling for Electrical Measurements

The interactive graphics below shows the impact on sampling rates on different waveforms. The error calculation is based on true-rms for a wave with 360 samples and for training purpose...

The Over- and Under Voltage Disconnection

The phase to neutral supply voltage is controlled by the power generation companies and utilities by using transformers with on-load tap changers. Depending on the region you can find different...

The Over-Current Disconnect Function

Electronic meters with build-in relays can serve for various functionalities. By IEC62052-11 Ed.2 the name for this sort of relays is Supply Control Switch (SCS).

Who pays for the Beep?

Electronic energy meters, especially those with STS payment functions have the ability to give an alarm. Low credit is a typical example.

Load Limiting for Energy Meters

Electronic energy meters with a load switch can be programmed for a maximum load. If a consumer exceeds the limit, he will be disconnected

Selection of Voltage Transformers

Voltage instrument transformers (VT, sometimes also abbreviated with PT) are used on the primary side of medium- and high voltage distribution transformers.

Selection of Current Instrument Transformers

Transformer operated energy meters need instrument transformers to reduce high voltage- and current values to lower quantities for measurement purpose.

Cross-sections for electricity wiring

Each conductor wire has a resistance. Resistance means heat development inside the wire. Technically it's a loss.

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.