Shelly Energy Meter Pro 3EM 3CT63

The Shelly Pro 3EM 3CT 63 is a three-phase energy meter for DIN rail mounting, which can also be used in single-phase networks. It comes with a combined 3-phase current transformer (up to 63 A), which can be mounted directly on a circuit breaker, making installation easier. The device accurately captures power consumption in real-time – voltage, current, active power, and apparent power are continuously measured per phase and both accumulated energy and instantaneous values are displayed. Thanks to four-quadrant measurement, the Shelly Pro 3EM-3CT63 can capture both consumed and fed-in energy, making it ideal for photovoltaic systems and other feed-in applications. All measurement data is recorded in the internal memory, allowing up to 60 days of consumption data in 1-minute intervals to be available for evaluation. An integrated real-time clock ensures that stored measurements always have correct timestamps – even if there is no internet connection for a while. The Shelly Pro 3EM 3CT 63 has LAN and WLAN connectivity and supports Bluetooth for setup, allowing it to be flexibly integrated into your network or configured and read directly via the web interface. It can be operated independently in the local network or integrated into smart home and energy management systems via MQTT, Modbus TCP, HTTP/HTTPS, or Shelly Cloud. As a professional smart meter, this device also offers the possibility to control external loads (contactors) via the optional Shelly Pro 3EM Relay Add-on since there is no built-in relay. This makes the Shelly Pro 3EM 3CT 63 ideal for energy monitoring and optimization in various application areas – from private households to industry and commerce.

Recommended Accessories:

• Shelly Pro 3EM Switch Add-On

Features:

• Four-quadrant measurement: Captures imported (consumption) and exported (feed-in) active energy as well as reactive power in all four quadrants, ideal for photovoltaics and grid feed-in.
• DIN rail mounting: Compact module for easy installation on the rail (19 mm width), suitable for control cabinets and sub-distribution.
• Various connection types: Supports both three-phase networks and use in up to three separate single-phase circuits for flexible application.
• Current transformer connection: Contactless current measurement via the supplied 3-phase current sensor (63 A) enables safe installation without direct intervention in the conductors.
• Optical pulse display: LED indicators on the device visualize the current energy consumption through pulses, making control directly at the meter easier.
• Real-time clock: Integrated clock for accurate timestamps of measurement data, even in case of internet outage – for seamless data recording.
• Data logging: Internal memory holds up to 60 days of measurement data in 1-minute intervals, allowing historical consumption values to be read and analyzed at any time.
• External contactor control: Can control an external contactor with the optional Shelly Pro 3EM Switch Add-on to switch loads based on measurements or scripts (no built-in relay in the device).
• Photovoltaic compatible: Suitable for monitoring PV systems and detecting feed-in to the grid, to optimally manage self-consumption and energy flows.
• LAN and WLAN connectivity: Equipped with Ethernet connection (LAN) for secure, reliable data transmission as well as integrated WLAN function as an alternative or parallel connection.
• KNX support: Compatible with KNXnet/IP for direct integration into KNX building controls without additional gateways.
• High measurement accuracy: Complies with accuracy class B (IEC 62053-21) for active energy and delivers measurements with about ±1 % accuracy in the rated range.

Application Examples:

• Real-time monitoring of industrial machines to detect energy consumption and load peaks and derive maintenance needs early.
• Energy management in large commercial or office buildings for accurate allocation of electricity costs, detection of energy waste, and efficiency improvement.
• Monitoring of photovoltaic systems to measure generated solar energy and grid reference and to optimize the use of renewable energy.
• Real-time monitoring of charging stations for electric vehicles to track their power consumption and optimize charging performance within the house connection limit.
• Comprehensive energy monitoring in the private household to identify energy guzzlers and reduce total energy consumption through targeted measures.

Documentation:

• Shelly Knowledge Base
• Shelly Forum Deutsch

Technical Data:

• Manufacturer: Shelly
• Manufacturer SKU: SHELLY_PRO_3EM-3CT63
• Supply voltage: 100–260 V AC, 50/60 Hz
• Max. Current: 3 × 63 A (via supplied current transformer)
• Power consumption: < 3 W
• Measurement accuracy: Class B (±1 % for current/voltage in the rated range)
• Communication: LAN (RJ45) and WLAN (802.11 b/g/n 2.4 GHz); Bluetooth 4.2 (for setup)
• Supported protocols: MQTT, HTTP/HTTPS, Modbus TCP, Websocket, Shelly Cloud
• Data storage: Internal for ~60 days (1-minute intervals)
• Operating temperature: –20 °C to +40 °C
• Mounting: DIN rail (DIN rail, 1 division unit)
• Protection class: for indoor use only (dry area)
• Dimensions (HxWxD): 94 × 19 × 69 mm (module) / 14 × 54 × 26 mm (current sensor)
• Package dimensions: 100 x 50 x 80mm
• Weight: 181g

Scope of Delivery:

• 1x Shelly Pro 3EM-3CT63 Energy Meter (DIN rail module)
• 1x Combined 3-Phase Current Transformer 63 A (sensor clamp)