Shelly Pro 3EM 400A Three-phase WiFi Energy Meter

The Shelly Pro 3EM 400A is an advanced, three-phase WiFi energy meter designed for DIN rail mounting. This device provides professional integrators with additional options for customer solutions thanks to its enhanced gen2 firmware and LAN connectivity. It displays accumulated energy as well as real-time voltage, current, and power factor per phase and can measure up to 400 A for each phase and the neutral conductor. The Shelly Pro 3EM 400A is ideal for use in industrial facilities, for monitoring and controlling solar panels, and for two-way energy consumption monitoring in homes, offices, or factories.

Features:

• Three-phase energy meter for DIN rail mounting
• Current measurement of 3-phase networks with up to 400A each
• 4-quadrant measurement with multiple connection types
• Class B accuracy for active energy
• Suitable for photovoltaic
• Detection of phase sequence errors (optional)
• Optical pulse indication of energy consumption
• Storage for up to 60 days at 1-minute intervals

Application examples:

• Monitoring and controlling industrial facilities
• Two-way energy consumption monitoring in homes, offices, or factories
• Local control based on PV generation
• Monitoring and controlling solar panels and wind turbines

Documentation:

• Shelly Knowledge Base
• Shelly Forum German

Technical data:

• Manufacturer: Allterco
• Manufacturer SKU: Shelly_Pro_3EM_400A
• Physical properties:
  • Mounting: DIN rail
  • Maximum tightening torque of terminal screws: 0.4 Nm / 4.43 lbin
  • Conductor cross-section: 0.5 to 2.5 mm² / 20 to 14 AWG (solid, flexible and ferrule)
  • Length of stripped conductor: 6 to 7 mm / 0.24 to 0.28 in
  • Housing material: Plastic
  • Color: White
• Environmental conditions:
  • Ambient temperature: -20 °C to 40 °C / -5 °F to 105 °F
  • Humidity: 30 % to 70 % RH
  • Maximum altitude: 2000 m / 6562 ft
• Electrical data:
  • Power supply voltage AC: 110 - 240 V, 50/60 Hz
  • Power consumption: < 3 W
• Sensors and metering devices:
  • Internal temperature sensor: Yes
  • Voltmeter (RMS per phase): 100 - 260 V
  • Voltmeter accuracy: ±1 %
  • Ammeter (RMS via CT for each phase and the neutral): 0 - 400 A
  • Compatible CT: CT-400A
  • Ammeter accuracy: ±1 % (5 - 400 A), ±2 % (0 - 5 A)
  • Power and energy meter: Active and apparent power, active and apparent energy, power factor, basic active and basic reactive energy
  • Minimum load for channel-to-channel calibration: 5000 W per channel
  • No load threshold: 30 VA per channel
  • Storage of measurement data: Minimum 60 days with a data resolution of 1 minute
  • Data export: CSV for recorded PQ values, JSON format export via RPC
• Radio:
  • RF band: 2400 - 2495 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 memory: 16 MB
  • Firmware capabilities
  • Webhooks (URL actions): 20 with 5 URLs per hook
  • Scripting: Yes
  • MQTT: Yes
  • CoAP: No
• Dimensions: 94 x 19 x 69mm
• Weight: 1084g

Scope of delivery:

• 1x Shelly Pro 3EM 400A Three-phase WiFi energy meter
• 3x 400A current clamps