Shelly Pro 3EM
Next-Generation DIN-Mountable 3-Phase Energy Meter
Shelly Pro 3EM is a DIN rail mountable three-phase energy meter. Enhanced with Gen 2 firmware flexibility and LAN connectivity, it provides professional integrators with additional options for end-customer solutions. Shelly Pro 3EM reports accumulated energy as well as instantaneous voltage, current, and power factor per phase in real time.
Key Features
- ?Wi-Fi, LAN, and Bluetooth connectivity: Simultaneous Wi-Fi and LAN usage, add device fast and easily via Bluetooth connection.
- ⚡4-quadrant measurement: Measure capacitive and inductive load types of active imported and exported energies.
- ?Accuracy class B (active energy): Shelly Pro 3EM has a measurement accuracy of 1%.
- ?MODBUS support: Allows for easy and fast deployment in existing industrial installations.
- ?Power monitoring: Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and at least 60 days of 1-minute records storage.
- ⚙️Scripting functionalities: Shelly Pro 3EM fully supports mjS scripting, allowing you to create further features and functionalities.
- ?️Enhanced safety: Flame retardant shell (V-0) with internal overtemperature, overpower and overvoltage protection.
- ?Enhanced security: MQTT and WSS support, TLS and custom certificates support for a broad range of use cases.
- ?No hub required: Control directly and without a hub through your smartphone with Shelly Smart Control App.
- ?Highly compatible: Use with your preferred home automation platforms and voice assistants.
Application Areas
Industry-Grade Security
Shelly Pro 3EM supports mTLS for MQTT, HTTP, and secure outbound WebSockets, allowing for direct connections to your cloud infrastructure, reducing the cost of deploying complex networks and VPNs.
Industrial Installations
Shelly Pro 3EM brings support for MODBUS for voltage, current, power, and energies. You can accurately sample your energy usage and instantaneous values of voltage, current, and power.
Solar Panels Monitoring and Control
Save effortlessly by keeping track of how much energy your solar panels or wind turbines are generating. With Shelly Pro 3EM you can get real-time information about the efficiency of the solar and wind energy system.
Technical Specifications
| Specification | Value |
|---|---|
| Power supply | 110-240 VAC, 50/60 Hz |
| Voltmeters (RMS for each phase) | 100-260 V |
| Voltmeters accuracy | ±1% |
| Ammeters (RMS via CT for each phase and the Neutral) | 0-120 A |
| Complies with EU standards | RED 2014/53/EU LVD 2014/35/EU EMC 2014/30/EU RoHS2 2011/65/EU |
| Working temperature | -20°C to 40°C / -5°F to 105°F |
| Max RF power Wi-Fi | 15 dBm |
| Wireless/Wi-Fi Protocol | 802.11 b/g/n (2.4 GHz) |
| Frequency | 2400-2495 MHz |
| Operational range Wi-Fi (depending on local conditions) | Up to 30 m / 100 ft indoors Up to 50 m / 160 ft outdoors |
| Dimensions (HxWxD) | 94x19x69 mm / 3.70x0.75x2.71 in |
Wiring Diagram and Connectivity
The Shelly Pro 3EM features a comprehensive wiring setup for three-phase power systems. The device terminals include inputs for Phase A (A), Phase B (B), Phase C (C), and Neutral (N). It also supports current transformer inputs for each phase: IA (Phase A current transformer), IB (Phase B current transformer), IC (Phase C current transformer), and IN (Neutral current transformer). The power supply connections are labeled LA (Phase A, 110-240 VAC), LB (Phase B, 110-240 VAC), LC (Phase C, 110-240 VAC), and N (Neutral cable). This setup allows for detailed monitoring of voltage, current, and power across all phases.
