Shelly Pro 3EM-3CT63 is a DIN-rail mountable energy consumption monitor for both single-phase and three-phase systems. Enhanced with all the flexibility of Gen2 firmware and featuring LAN connectivity, the device provides professional integrators with additional options for end-user solutions. It can operate independently within a local LAN and/or Wi-Fi network, or be controlled via cloud home automation services using Modbus, MQTT, HTTP, and WebSocket. All incoming connections support TLS.
The device reports both total energy consumption and the direct voltage, current, active and apparent power per phase/channel in real-time. Data is stored in non-volatile memory and can be retrieved for up to 60 days in one-minute intervals.
The device features a real-time clock to maintain accurate time if the connection to an SNTP server is lost.
Shelly Pro 3EM-3CT63 can be accessed, configured, and monitored remotely by the user as long as the device and the automation system are within the same network infrastructure.
The device has a built-in web interface allowing you to monitor, control, and adjust settings.
⚠ WARNING! The device does not have a built-in relay. Switch control is enabled by using a Shelly Pro 3EM Switch Add-on, which can be connected to the Shelly Pro 3EM-3CT63.
Features
- Four-quadrant measurement
- DIN-rail mountable
- Various connection options: suitable for both single-phase and three-phase installations
- Current transformer connection: non-contact measurements
- Phase sequence fault detection* (optional)
- Channel-to-channel calibration**
- Low threshold for load detection***
- Optical pulse indication of energy consumption
- Real-time clock: recorded data maintains accurate timestamps even if the internet connection is interrupted****
- Data log: up to 60 days of data stored on the device for later use
- External switch control: loads can be controlled based on device automation or scripts. Available with the addition of the Shelly 3EM Switch Add-on
- Accuracy class B (IEC 62053-21)
- Suitable for photovoltaic systems
*The device features circuits for phase sequence fault detection. This detection works based on phase voltages and only considers the zero-crossings. The normal order of these crossings is Phase A, followed by Phase B, followed by Phase C. If the order is instead Phase A, followed by Phase C, followed by Phase B, a phase sequence fault will be reported when the fault detection option is enabled.
**A minimum load of 500 W per channel is required.
***If the total load for the three channels drops below 30 VA per channel, the measured power level will be displayed, but no consumed energy will be added to the statistics. A no-load threshold notification will appear in the device's web interface and mobile app.
****Shelly devices rely on an internet connection for timekeeping. In case of network issues or service interruptions, the built-in clock ensures accurate timestamps for records.