Shelly Pro 3EM-400 is a three-phase energy meter for DIN rail mounting. It has been enhanced with the full flexibility of gen2 firmware and LAN connectivity, offering professional integrators additional options for end-customer solutions. Shelly Pro 3EM-400 displays accumulated energy as well as real-time voltage, current, and power factor per phase.
The Shelly Pro 3EM 400A is a Wi-Fi operated, DIN-rail mountable 3-phase power consumption meter with Wi-Fi, Bluetooth, and LAN connectivity. With its active energy measurement accuracy of 1%, the Shelly Pro 3EM can be used to monitor the consumption of all household appliances, circuits, and office devices individually. Historical data is stored for up to 60 days, with each phase having a one-minute resolution. Additionally, the scripting functionalities allow the execution of complex scenarios and offer advanced monitoring capabilities.
Technical data
| SPECIFICATIONS |
| Size (HxWxD): |
94x19x69 ±0.5 mm |
| Weight: |
62 ±1 g |
| Mounting: |
DIN rail |
| Screw terminal max torque: |
0.4 Nm |
| Conductor cross-section: |
0.5 to 2.5 mm² / 20 to 14 AWG (solid, stranded, and ferrule) |
| Conductor length: |
6 to 7 mm |
| Device material: |
Plastic |
| Color: |
White |
| FEATURES |
| Ambient temperature: |
-20 °C to 40 °C |
| Humidity: |
30 % to 70 % RH |
| Max. altitude: |
2000 m |
| CONNECTION |
| AC power supply: |
110 - 240 V, 50/60 Hz |
| DC power supply: |
N/A |
| Device power consumption: |
< 3 W |
| SENSORS, METERS |
|
| Temperature sensor: |
Yes |
| Voltage meters (RMS for each phase): |
100 - 260 V |
| Voltage meter accuracy: |
±1 % |
| Current meters (RMS via CT for each phase and neutral conductor): |
0 - 400 A |
| Current meter accuracy: |
±1 % (5 - 400 A), ±2 % (0- 5 A) |
| Power and energy meters: |
Active and apparent power, active and apparent energy, power factor, fundamental active and fundamental reactive energy |
| No load threshold: |
30 VA per phase |
| Storage of measurement data: |
At least 60 days with a data resolution of 1 minute |
| Data export: |
CSV for recorded PQ values, JSON format export via RPC |
| Frequency |
| RF band: |
2.4 MHz |
| Max. RF power: |
<20 dBm |
| Wi-Fi protocol: |
802.11 b/g/n |
| Wi-Fi range: |
Up to 30 m indoors and 50 m outdoors (depending on local conditions) |
| Bluetooth protocol: |
4.2 |
| Bluetooth range: |
Up to 10 m indoors and 30 m outdoors (depending on local conditions) |
| MCU |
| CPU: |
ESP32-D0WDQ6 |
| Flash: |
16 MB |
| FIRMWARE CAPABILITIES |
| Webhooks (URL actions): |
20 with 5 URLs per hook |
| Scripting: |
mJS |
| MQTT: |
Yes |
| CoAP: |
No |
|
