The Shelly Pro 3EM is a DIN rail mountable three-phase energy meter. Enhanced with all the gen2 firmware flexibility and LAN connectivity, it provides professional integrators with additional options for end-customer solutions. It can work standalone in a local LAN and/or Wi-Fi network, or it can also be operated through cloud home automation services through MQTT, HTTP, and WebSocket. All inbound connections support TLS.
The Device reports accumulated energy as well as instantaneous voltage, current, active, and apparent power per phase in real time. It stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals.
The Device has a real-time clock to keep the correct time if the connection to an SNTP server is lost.
Shelly Pro 3EM can be accessed, set up, and monitored remotely by the User, as well as the Device can access and communicate with an automation system, as long as they are in the same network infrastructure.
The Device has an embedded Web Interface which can be used to monitor and control the device, as well as adjust its settings.
⚠ NOTICE! The Device does not have a built-in relay. Contactor control is provided using a Shelly Pro Addon attached to the Shelly Pro 3EM.
Features
- 4 Quadrant measurement
- DIN rail mounting
- Multiple connection types
- Current transformer connection
- Phase sequence error detection* (option)
- Channel-to-channel calibration**
- No load threshold***
- Optical pulse indication of energy usage
- Real-time clock
- Data logs
- Accuracy Class B (IEC 62053-21)
- Photovoltaic ready
* The device has phase sequence error detection circuits. This detection works on phase voltages and considers only the zero crossings. The regular succession of these zero-crossing events is Phase A followed by Phase B and then Phase C. If the sequence of zero-crossing events is instead Phase A followed by Phase C and then Phase B, a phase sequence error is reported when the Phase Sequence Error Detection option is enabled.
** At least 500 W load is required for each channel.
*** If the total load of the three channels drops below 30 VA per channel, the measured power will be displayed, but no consumed energy will be accumulated in the energy statistics. A “No Load Threshold” notification will appear in the Device web interface and the mobile app.