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 offers professional integrators additional options for end-customer solutions thanks to its advanced gen2 firmware and LAN connectivity. It displays accumulated energy as well as instantaneous voltage, current and power factor per phase in real time 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 photovoltaics
• Detection of phase sequence errors (optional)
• Optical pulse display of energy consumption
• Storage for up to 60 days in 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 Deutsch

Technical Specifications:

• Manufacturer: Allterco
• Manufacturer SKU: Shelly_Pro_3EM_400A
• Physical Properties:
  • Mounting: DIN rail
  • Maximum torque of screw terminals: 0.4 Nm / 4.43 lbin
  • Conductor cross section: 0.5 to 2.5 mm² / 20 to 14 AWG (solid, flexible and ferrules)
  • Length of stripped conductor: 6 to 7 mm / 0.24 to 0.28 in
  • Housing material: Plastic
  • Color: White
• Ambient 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 Measuring Devices:
  • Internal temperature sensor: Yes
  • Voltmeter (RMS for each phase): 100 - 260 V
  • Accuracy of voltmeter: ±1 %
  • Ammeter (RMS via CT for each phase and neutral conductor): 0 - 400 A
  • Compatible CT: CT-400A
  • Accuracy of ammeter: ±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
  • Measurement data storage: At least 60 days with a data resolution of 1 minute
  • Data export: CSV for recorded PQ values, JSON format export via RPC
• Wireless:
  • 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

Package Includes:

• 1xShelly Pro 3EM 400A Three-phase WiFi Energy Meter
• 3x 400A Current Measurement Clamps