ENERGY METER SHELLY PRO 3EM 400A

Shelly Pro 3EM-400 is a three-phase energy meter that uses current transformers to measure energy data from three separate phases for loads up to 400A with 99% accuracy. The device measures power, current, voltage, and power factor (PF) in real time with one-minute resolution. Additionally, it is possible to purchase an extra current transformer for measuring neutral current. Installation and control of the Shelly Pro 3EM-400 is easy via the Shelly Smart Control app or your chosen smart home system. Shelly devices operate 100% locally and require only a local network to function. Shelly can be used standalone in the Shelly Smart Control app or integrated with over 200 partner systems such as Google Home, Amazon Alexa, Home Assistant, Samsung SmartThings, Athom Homey, and many others. Features

The Shelly Pro 3EM is designed for DIN-rail mounting and comes with three current transformers. The device reports real-time measurements of power (W), voltage (V), current (A), and power factor (PF), storing data for up to 60 days on the device and 365 days when connected to the Shelly Cloud app. The device also meets IEC 62053-21 standard requirements with Class B accuracy (maximum 1% deviation). The Shelly Pro 3EM includes a built-in real-time clock that maintains time and date even if the connection to the SNTP server is lost.

Connectivity

The Shelly Pro 3EM can be connected to the internet or a local network via LAN port and/or 2.4 GHz Wi-Fi. Additionally, the device has built-in Bluetooth, like other Pro and Plus devices, allowing it to function as a gateway for Shelly Bluetooth-enabled devices.

The Shelly Pro 3EM operates locally without a connection to Shelly Cloud, but activating it is recommended for easy data storage and additional features. The device can also communicate via MQTT, HTTP, and WebSocket—all supporting TLS. As a new feature, the Shelly Pro 3EM also supports Modbus TCP connectivity.

Hardware

The device is equipped with second-generation hardware, including a powerful ESP32 processor. This enables the use of scripting capabilities for advanced and customized functionality, as well as the range extender feature with the device.

Note that the Shelly Pro 3EM does not have a built-in relay output, unlike the older Shelly 3EM. Instead, the Shelly Pro 3EM Switch Add-on (3800235268131) can be purchased to enable external relay control.

This product description is an automated translation of the original Finnish description.