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Overview:

What is Shelly Pro 3EM-120A?
Next-generation DIN-mountable 3-Phase Energy Meter

Enhanced with all the gen2 firmware flexibility and LAN connectivity, the Shelly Pro 3EM-120 provides professional integrators with additional options for end-customer solutions. Shelly Pro 3EM-120 reports accumulated energy as well as instantaneous voltage, current, and power factor per phase in real-time.

• Can measure up to 120A per phase and the neutral
• 4 quadrant measurement with multiple connection types
• Accuracy Class B active energy (Compliance with IEC 62053-21 based on manufacturer testing)
• Photovoltaic ready
• Phase sequence error detection (option)
• Optical pulse indication of energy usage
• Measurement accuracy tо 1%
• Stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals
• Package includes 3 pieces of 120A Current Transformers

Features:

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.

Wi-Fi, LAN, and Bluetooth connectivity
Simultaneous Ethernet and Wi-Fi usage. MQTT, inbound and outbound WebSocket, UDP, mTLS support.

Power Monitoring
Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and at least 60 days of 1-minute records storag

Scripting functionalities
Shelly Pro 3EM fully supports mjS scripting, allowing you to create further features and functionalities.

Specifications:

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Specifications
Product Code	SHELLY PRO 3EM-120A
PHYSICAL
Size (HxWxD)	94x19x69 ±0.5 mm / 3.70x0.75x2.71 ±0.02 in
Weight	62 ±1 g / 2.19 ±0.05 oz
Mounting	DIN rail
Screw terminals max torque	0.4 Nm / 4.43 lbin
Conductor cross section	0.5 to 2.5 mm² / 20 to 14 AWG (solid, stranded, and bootlace lugs)
Conductor stripped length	6 to 7 mm / 0.24 to 0.28 in
Shell material	Plastic
Color	White
ENVIRONMENTAL
Ambient temperature	-20 °C to 40 °C / -5 °F to 105 °F
Humidity	30 % to 70 % RH
Max. altitude	2000 m / 6562 ft
ELECTRICAL
Power supply voltage AC	110 - 240 V, 50/60 Hz
Power supply voltage DC	N/A
Power consumption	< 3 W
Sensors, meters
Temperature sensor	Yes
Voltmeters (RMS for each phase)	100 - 260 V
Voltmeters accuracy	±1 %
Ammeters (RMS via CT for each phase and the Neutral)	0 - 120 A
Ammeters accuracy	±1 % (2 - 120 A), ±2 % (1 - 2 A), ±5 % (0 - 1 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
Measurement data storage	At least 60 days of 1 min data resolution
Data export	CSV for PQ recorded values JSON format export through 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 / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions)
Bluetooth Protocol	4.2
Bluetooth Range	Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends 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