• November 15, 2023

    Who pays for the Beep?

    Energy Meter Alarm

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

  • May 6, 2024

    Load Limiting for Energy Meters

    Energy Meter Load Limit Function

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

  • January 1, 2024

    Selection of Voltage Transformers

    r CL730D22L

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

  • November 7, 2023

    Selection of Current Instrument Transformers

    CL730S23 TWO BUTTONS

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

  • February 26, 2024

    Cross-sections for electricity wiring

    cat5 cable cradle wiring

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

  • March 20, 2024

    Maximum Current for Energy Meters

    terminal quick connector for Chinese singlephase meter

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

  • April 16, 2024

    The TID Clock is ticking

    r CL730S1

    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.

  • October 28, 2023

    Markings on the Case of Energy Meters

    r nameplate 1

    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.

  • October 29, 2023

    Swapping Phase and Neutral

    meter box CL758WK

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

  • January 3, 2024

    Ring Wave Immunity Test

    ring waveform IEC 61000 4 12

    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.

  • June 21, 2021

    The Uttar Pradesh Smart Meter Shutdown

    Taj Mahal Uttar Pradesh

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

  • January 2, 2024

    Electrostatic Discharge Test for Energy Meters

    esd warning sign e1597885223669

    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.