Shelly Pro 3EM 400A

The Shelly Pro 3EM 400A is a professional, DIN-rail mountable three-phase smart energy meter designed for high-current industrial and commercial installations, capable of measuring up to 400A per phase. It offers real-time monitoring and advanced connectivity options (Wi-Fi, LAN, and Bluetooth).

Key Features:

• High Current Measurement: Can measure up to 400 A for each phase and the neutral conductor using the included 3 x 400A current transformers (CTs).
• Mounting: Designed for installation on a standard DIN rail inside a breaker box or electrical panel.
• Connectivity: Offers multiple connection options for reliability: LAN (Ethernet), Wi-Fi, and Bluetooth connectivity. It also acts as a Wi-Fi range extender and Bluetooth Low Energy (BLE) gateway.
• Photovoltaic (PV) Ready: Supports 4-quadrant measurement for monitoring both imported and exported energy, making it ideal for systems with solar panels or wind turbines.
• High Accuracy: Provides an active energy measurement accuracy of Class B (according to IEC 62053-21 standard), ensuring reliable data with an accuracy of up to 1%.
• Local Data Logging: Stores historical data on the device for at least 60 days with a one-minute resolution for each phase, even without an internet connection.
• Advanced Automation & Scripting:
  • Supports mJS scripting for creating complex, custom automation scenarios and functionalities.
  • Features local control capabilities and webhooks to control other Shelly devices on the local network without relying on the cloud.
• System Integration: No hub is required for operation, and it integrates easily via MQTT, HTTP, and MODBUS support for compatibility with industrial installations and popular smart home platforms like Amazon Alexa and Google Assistant.
• Safety & Security: Includes an internal temperature sensor and a flame-retardant casing for protection against excess temperature, overcurrent, and overvoltage.
• Phase Sequence Detection: An optional feature allows for the detection of incorrect phase sequence during installation.
• Contactor Control (via Add-on): The device itself does not have a built-in relay, but external contactor control can be added using the separate Shelly Pro 3EM Switch Add-on.