Shelly Pro 3EM - 120A Three Phase Meter

The Shelly Pro 3EM is a professional 3-phase DIN rail energy meter designed to monitor electricity consumption in real time with Class B accuracy.

It allows monitoring of voltage, current, active power, and energy for each phase, making it ideal for three-phase homes, solar installations, businesses, and light industry.

Includes 3 x 120A current transformers for immediate installation.

Advanced 3-Phase Monitoring and Energy Control

• Independent phase measurement (A, B, and C)

• Class B accuracy (IEC 62053-21)

• Historical data up to 60 days (1-minute intervals)

• Phase sequence detection

• Data export in CSV and JSON

• Ideal for main electrical panels

Key Benefits

• Optimizes electricity consumption and reduces costs

• Detects demand peaks and overloads

• Perfect for photovoltaic installations

• Improves energy efficiency in businesses

• Allows detailed consumption analysis

Professional Connectivity and Compatibility

• LAN for stable connection

• Wi-Fi 802.11 b/g/n

• Bluetooth 4.2

• MQTT, HTTP, and WebSocket with TLS

• Integrated web interface

• ESP32 processor with 16 MB Flash

• Integration with home automation systems and IoT platforms

Technical Specifications

Electrical

• Power supply: 110 – 240 V AC, 50/60 Hz

• Self-consumption: < 3 W

• Measured current: 0 – 120 A

• Voltage: 100 – 260 V (±1 %)

Accuracy

• ±1 % (2–120 A)

• ±2 % (1–2 A)

• ±5 % (0–1 A)

Measurement

• Active and apparent power

• Active and reactive energy

• Power factor

Installation

• DIN rail mounting

• Dimensions: 94 x 19 x 69 mm

• Operating temperature: -20 °C to 40 °C

Recommended complementary product

For more detailed monitoring of secondary circuits or specific single-phase lines, you can combine it with the Shelly Pro EM-50, ideal for complementing main three-phase measurement with individualized control.