The Shelly Pro 3EM-3CT63 is a DIN-rail, one or three-phase energy meter that can operate on a local network (LAN / Wi-Fi) on your own, or connect to cloud-based automation systems via modbus, MQTT, HTTPS or WebSocket protocol, with TLS encryption.

The specially designed combined 3 -phase current transmission (CT) is designed to be installed directly to the output of a small broker.

In real time, data for each phase is per channel: voltage, current, active and apparent power, and overall consumption values. The device has a built -in real -time hour and can store up to 60 days of data in a 1 minute breakdown. It can be fully adjusted and supervised through a web interface.

Caution: The device does not contain a built -in relay! Load switching is only possible with the Shelly Pro 3EM Switch ADD expansion unit.

Main features

- 4 quadrant power measurement
- DIN-rail-mounted design
- Multiple connection options: for 1 or 3-phase systems
- Touch -free current measurement with current shift
- Phase-Order Control (Optional)
- Calibration per channel (min. 500 W load required)
- threshold without load: 30 VA/channel
- optical pulse display
- Real -time watch for internet failure
- Data Log: 60 days with a resolution of 1 minute
- External contactor management (SWITCH ADD-ONE)
- Accuracy: Class B (IEC 62053-21)
- prepared for solar systems

Interfaces and protocols

- LAN (Ethernet) 1 pc RJ45
- Wi-Fi 802.11 b/g/n (2.4 GHz)
- Bluetooth 4.2 for primary configuration
- Modbus, MQTT, RPC, WebSocket Protocol Support
- TLS encryption for all incoming relationships

Technical data

- Size: Shelly Pro 3EM-3CT63: 94 × 19 × 69 mm, Shelly 3CT63: 14 × 54 × 26 mm
- casing: plastic, white
- Operating temperature: -20 ° C 40 ° C
- Humidity: 30% 70% RH
- Power voltage: 100-260 V ~ 50/60 Hz
- Consumption: <3 W
- Protection: B or C characteristics, 16 A, min. 6 ka
- Voltometer range: 100-260 V (± 1%)
- Range of current: 0-63 A (accuracy: ± 1 % (2-63 A), ± 2 % (1-2 A), ± 5 % (0–1 a)
- Internal Temperature Sensor: Yes
- Data storage: at least 60 days in 1 minute breakdown
- Data export: csv, json (via rpc)
- 20 webhooks, max. 5 URL
- Scripting support (eg for automation)
- MQTTT compatibility
- encrypted communication (TLS)
- Push button: 1 × Press Switch Add-on Relay Status, Activate 5 MP AP mode, 10 sec factory reset
- Din-rail mounted (Shelly Pro 3em)
- CT sensors can be clipped to phase wires
- Direction of current: K → l must be placed by direction
- Attention: The LAN cable should only be connected or removed when disconnected!

LEDs:

- Red power supply
- Blue AP mode
- Yellow Wi-Fi connection, Shelly Cloud turned off
- Green Shelly Cloud is an active relationship
- Red/blue blink ota update

Compatible systems and use

- Shelly Cloud
- Home Assistant
- Openhab
- Domoticz
- Rest api
- mqtt

Fields of use

Industrial energy distribution:
In an industrial environment, where complex energy distribution systems operate, the combined 3 -phase current transmission (CT) is efficiently measured and monitors the current level. This is key to optimizing energy use and real -time recognition of potential problems.

Commercial buildings and facilities:
In commercial buildings and facilities, where the location is often limited in the electrical distribution cabinets, the compact design of the CT is beneficial. Installation over interruptions provides a space -saving solution while maintaining accurate current measurement.

Motor Control Centers (MCC):
Frequent engine control centers in manufacturing plants and industrial facilities have several breakers. Each breaker has a combined 3 -phase CT integrated solution to monitor motor currents, promoting preventive maintenance and debugging.

Data Centers:
In data centers, where accurate monitoring of energy consumption is of paramount importance, combined 3-phase CTs measure the current flowing through critical devices above the breakers.

Renewable Energy Installations:
Combined 3-phase CTs can be used in renewable energy systems, such as solar or wind farm systems. Installed for control panels, they provide accurate current measurement for monitoring and control purposes.

Monitoring of substations:
In electrical substations, where the space is often scarce, combined 3-phase CTs can be beneficial. Equipped on interruptions, they help monitor the current values ​​per phase, thus contributing to the stability and reliability of the substation.

Building control systems (BMS):
In smart building control systems, the existence of real -time, accurate consumption data is essential. Combined 3-phase CTs provide the data needed for energy management and load control strategies when mounted on breakers.

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