Legrand 412175

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 8 values from it, listed under Interface.

Connect it with

• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The 412175 is Legrand's connected three-phase energy meter in the Drivia with Netatmo range. The module is one DIN module (17.7 mm) wide and comes with three closed Rogowski coils on a removable connector. Each coil measures one phase from 2 A to 125 A AC, and the coil set is matched to its module: coils are not interchangeable between meters.^2, 3

Power

Mains. Powered at 100 to 240 V AC between neutral and phase 3 of the measured supply, 0.3 W maximum.³

Measured current

2 to 125 A AC per phase²

Accuracy

±1 % for module and coil, above 2 A and cos φ ≥ 0.8²

Accuracy class

1¹

Current sensors

Three closed Rogowski coils, 350 mm leads³

Coil capacity

1 × 50 mm² (12.4 mm) with support; 1 × 70 mm² (15.3 mm) without²

Network

Three-phase, 110 to 500 V AC, 50/60 Hz²

Module supply

100 to 240 V AC between N and V3, 0.3 W maximum³

Supply protection

Three-phase circuit breaker, C2 to C16²

Radio

IEEE 802.15.4, 2.4 to 2.4835 GHz, under 100 mW²

Terminals

Cage, 1 to 2.5 mm², 8 mm stripped, 0.5 Nm²

Width

1 DIN module, 17.7 mm²

Dimensions (W × H × D)

17.7 × 101.6 × 67.2 mm¹

Weight

109 g²

Protection

IP2X terminals, IP3XD front face, IK04, Class II front face²

Standards

EN/IEC 61010-1; coils insulation class A to IEC 61869-2²

Where it is used

• Total consumption at a three-phase incomer up to 125 A per phase, with per-phase power to show imbalance.

  Transformer and distribution board monitoring

• A three-phase sub-circuit in a small commercial building, such as HVAC plant or a kitchen, without breaking into the cables.

  HVAC energy monitoring for commercial buildings

• Site-level power on small shops and branches, where one module per supply fits in an existing board.

  Multi-site energy monitoring

Interface

Readings and settings, with units and ranges where Legrand publishes them. R readable, R·W readable and writable.⁵

Zigbee2MQTT reads it through the Electrical Measurement cluster. The first phase appears as power and power_apparent; the other two carry the suffixes phase_b and phase_c.⁵

Zigbee2MQTT's definition notes that the module forgets its reporting configuration after a restart or power loss, and sets reporting up again each time the module announces itself on the network.⁵

Over Zigbee it reports power, not an energy counter. Legrand's app builds daily, weekly, monthly and yearly consumption history from the same module.^1, 5

Setup

1. Wire the module with the supply off

   Turn off the main breaker. Connect N, V1, V2 and V3 through a three-phase C2 to C16 breaker, keeping the phase order marked on the connector.³

2. Fit the coils

   Pass each phase conductor through its coil so that coil I1 is on L1, I2 on L2 and I3 on L3, with the arrow on each coil in the direction of current flow.³

3. Clear any earlier pairing

   If the module has been used before, hold its setting button for more than 5 seconds until the LED turns steady red. It is then no longer paired with any gateway.²

4. Open pairing in Edge and switch on

   Open pairing on the Gateway's Zigbee network in Edge, refit the front plate and turn the main breaker on. The LED is steady red until it joins, steady green once it has joined while the network is still open, and off in normal use.²

5. Check each phase

   Compare active power on each phase with a clamp meter reading on a known load. A negative value on a consuming load means that coil is the wrong way round.

Common questions

Does the 412175 need a Legrand gateway?

Only for Legrand's Home + Control app. Legrand requires a with Netatmo gateway for its own installation, but the module is a Zigbee device and Zigbee2MQTT's definition reads its power directly from the Zigbee network.^2, 5

Does it report energy in kWh over Zigbee?

No. Its Zigbee definition reports active and apparent power for each phase and a power alarm. Energy history is kept by Legrand's app.^1, 5

Can it measure solar generation or a single-phase supply?

No to both. Legrand states that it is not designed for single-phase networks and does not support photovoltaic installations.²

What size cables fit the coils?

One cable up to 50 mm², 12.4 mm across, with the coil's internal plastic support fitted, or up to 70 mm², 15.3 mm across, with the support removed.²