Shelly Pro 3EM-3CT63 – Three-Phase Energy Meter

Shelly Pro 3EM-3CT63 – Three-phase energy meter for DIN rail mounting

Device identification

Device name: Shelly Pro 3EM 3CT63
Device model: SPEM-003CEBEU63
Device SSID: ShellyPro3EM3CT63-XXXXXXXX
Device Bluetooth ID: 0x1025

Short description

Shelly Pro 3EM-3CT63 is a single- or three-phase energy meter for DIN rail mounting. It features advanced Gen2 firmware with flexibility and LAN connectivity, offering professional integrators additional capabilities for creating end-customer solutions.

The device operates independently in a local LAN and/or Wi-Fi network or can be used through cloud-based home automation services using Modbus, MQTT, HTTP, and WebSocket protocols. All incoming connections are secured with TLS.

The device transmits accumulated energy consumption, as well as real-time voltage, current, active and apparent power for each phase/channel. Data is stored in non-volatile memory for up to 60 days with one-minute intervals.

The built-in real-time clock ensures correct time stamps even if the connection to the SNTP server is lost.

The Shelly Pro 3EM-3CT63 can be remotely configured and monitored by the user, and the device can communicate with automation systems if they are on the same network.

The device has a built-in web interface for monitoring and controlling the device and changing its settings.

⚠ Note! The device does not have a built-in relay. Contactor control is possible using the Shelly Pro 3EM Switch Add-on module, which connects to the Shelly Pro 3EM-3CT63.

Key features

• 4-quadrant measurement

• DIN rail mounting

• Supports single- and three-phase connections

• Current transformer connection: contactless measurement

• Phase sequence error detection (optional)

• Inter-channel calibration**

• Minimum load threshold***

• Optical pulse energy consumption indicator

• Real-time clock – ensures correct time stamps even when internet connection is lost

• Data logs – up to 60 days of data stored on the device for later extraction

• External contactor control with Shelly 3EM Switch Add-on module

• Accuracy class B (IEC 62053-21)

• Suitable for solar energy production monitoring

(Specifications regarding phase sequence detection, calibration, and load threshold were in the original text and can be detailed separately if needed.)

Use cases

• Industrial energy consumption monitoring and optimization

• Commercial and office buildings with limited space in electrical panels

• Motor control centers (MCC), such as in manufacturing

• Data centers – precise consumption monitoring

• Renewable energy solutions (solar and wind energy)

• Substation monitoring

• Building automation (BMS)

• Energy quality monitoring in sensitive applications (medical, electronics)

• Electrical panel upgrades or space-constrained installation solutions

• Smart grid solutions

Internal circuits and interfaces

• 4 line inputs: 3 × L and 1 × N

• 4 current transformer inputs (3 for phases, 1 for neutral)

• Ethernet (RJ45) port

• Shelly add-on module interface

⚠ Warning! The LAN cable may only be connected and removed when the device is turned off.

Connectivity and protocols

• Wi-Fi

• Ethernet

• Bluetooth

• Protocols: Modbus, MQTT, RPC

User interface

• Input: one push button (for configuration, factory reset)

• Outputs: LED indicators (power, Wi-Fi, LAN, measurement, OTA update, etc.)

Technical specifications

• Dimensions: 94 × 19 × 69 mm (main unit), 14 × 54 × 26 mm (CT)

• Weight: 62 g (main unit), 32 g (CT)

• Operating environment: −20 °C … +40 °C, humidity 30–70% RH

• Power supply: 100–260 V~ 50/60 Hz

• Power consumption: <3 W

• Measurement range:

  • Voltage: 100–260 V (accuracy ±1%)

  • Current: 0–63 A (accuracy ±1% in range 2–63 A)

• Data storage: up to 60 days, 1-minute intervals

• Connectivity: Wi-Fi 802.11 b/g/n, Bluetooth 4.2

• CPU: ESP32-D0WDQ6, Flash 16 MB

• Features: Webhooks, scripting, MQTT, encryption

User manual: Shelly Pro 3EM-3CT63 multilingual printed user and safety guide.pdf

Manufacturer website: Shelly Pro 3EM-3CT63