Power metering and monitoring

Choosing a power metering approach

Define the purpose of each measurement

Monitoring a production line, understanding a building's consumption and providing evidence for a commercial service are different requirements. Identify where the measurement belongs and what data the receiving system needs.

Record the electrical arrangement, expected current range, space available and installation constraints. The electricity monitoring page links to the current datasheet and configurations; use it for model-specific capabilities.

Treat the meter and current transformer as a system

Choose the current transformer on more than its maximum current: check its output, ratio, aperture, installation method and compatibility with the selected meter. Confirm the configuration and measurement direction during commissioning.

An accuracy class applies under the specified measurement conditions, so check the installation and transformer selection against them. Where billing or a grid service is involved, establish the applicable metering requirements with the responsible party.

See current-transformer selection considerations before selecting the options in the shop.

Decide how to connect the measurement points

Wireless communications can reduce communications-cable runs between distributed locations, but radio coverage, the electrical installation and Gateway placement still need assessment.

Where suitable wired meters already exist, investigate their supported interfaces before replacing them. The Modbus interface and the M-Bus interface serve different source equipment; check their datasheets against it.

The right choice depends on the building and existing infrastructure, so compare wired and wireless metering for each site.

Make the readings useful locally

The Gateway hosts Edge, where supported devices share a common data model. Use local dashboards and data tools to compare the site total with individual circuits, review trends and investigate equipment operation.

An external energy platform is optional. If you need one, agree identifiers, units, timestamps and the meaning of energy readings before configuring the export. The energy management software guide covers that handoff.

Commission the complete installation

Check the selected hardware and settings against the installation design. Compare readings with a suitable reference and investigate unexpected direction, phase relationships or totals. Keep the point names and documentation useful to the next person operating the site.

For specialist power-quality, protection or fiscal requirements, list the required functions and approvals and check each against the datasheet before ordering a configuration.