Legrand: Connected electrical distribution and energy measurement

Legrand makes connected electrical equipment, including single- and three-phase energy meters, controls and building integration interfaces.

Best for: Adding circuit-level energy measurement and load controls within an electrical installation.
Less suited to: Assuming every Legrand meter uses the same interface: with Netatmo Zigbee, Modbus and other system families differ.
Deployment: DIN-rail measurement modules, current transformers and a compatible gateway or controller selected for the product family.
Data in: Exact with Netatmo references have published Zigbee cluster documentation; other meter families offer different interfaces.
Pricing: Meters, current transformers, gateways and control modules are hardware selections priced by reference.

Overview

Legrand's connected electrical products combine measurement with the equipment already installed in a distribution board. The 412015 energy meter is a single-phase measurement option, while 412175 is a three-phase product. Both belong to the with Netatmo environment, but their electrical scope is different.

That distinction is more useful than treating the Legrand name as one meter specification. A project needs to identify the circuit arrangement, current transformers and data destination together. The company's communications overview also distinguishes connected-home products from Modbus-equipped metering ranges. The desired interface is therefore part of choosing the product, rather than something guaranteed by the general family name.

Offering

The 412015 is supplied with one closed 80 A current transformer and is intended for a single-phase circuit. Legrand explicitly excludes three-phase installations for this reference. Its documentation also separates the measurement of solar production from consumption when both are to appear in the manufacturer's app.

The 412175 is supplied with three closed current transformers rated up to 125 A and measures a three-phase supply or circuit. It can show consumption by phase. These are meaningful selection differences: the three-phase unit is not simply a software setting on the single-phase meter. The exact reference belongs in the design alongside the transformer arrangement and the circuit being monitored.

Technology

Legrand publishes local interoperability documentation that maps 412015 to the NLPC power-consumption module and 412175 to the NLY three-phase meter. It also provides product-specific Zigbee cluster documents. This gives an integrator a more precise starting point than a generic statement that the devices are wireless.

The same portal distinguishes Zigbee products from other local interfaces, including Open Web Net for MyHome. Those are different integration paths. The communications overview separately identifies RS-485 Modbus metering equipment. A compatible network connection must therefore be followed by a check of the exact product's data model; a protocol name alone does not establish which measurements or controls a receiving system supports.

Markets

The single-phase product page places connected metering in the home electrical panel, with consumption and solar-production views available through Home + Control. The three-phase product documentation extends that measurement approach to three-phase housing supplies and individual three-phase lines. This makes the range useful for understanding particular loads as well as an incoming supply.

Measurement and control remain separate decisions. Seeing a circuit's consumption does not, by itself, provide a means of switching it. Likewise, a connected controller is not automatically an energy meter. Keeping those functions distinct makes a specification clearer when the objective changes from observing a load to scheduling or limiting its operation.

Company

Legrand's history dates the company to 1904, while its corporate contact information identifies the headquarters in Limoges, France. Its current electrical products span several system families, which is why the exact reference and interface matter more for an integration than the corporate name alone.

The public developer portal is particularly useful for this range because it connects product references to named local communication documents. That documentation supports a model-specific integration assessment. It does not turn every Legrand or with Netatmo product into the same device, and it should remain tied to the selected reference when a configuration is shared, maintained or reused elsewhere.