The Shelly Pro 3EM-3CT63 is a DIN rail mountable single or three-phase energy meter. It can work standalone in a local LAN and/or Wi-Fi network, or it can also be operated through cloud home automation services through Modbus, MQTT, HTTP, and WebSocket. All inbound connections support TLS.
The 3EM-3CT 63 reports accumulated energy as well as instantaneous voltage, current, active, and apparent power per phase/channel in real time. It stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals. It has a real-time clock to keep the correct time if the connection to an SNTP server is lost.
Shelly Pro 3EM comes with a specially designed Shelly 3-phase current transformer. This small yet powerful CT measures up to 63A, making it perfect for accurate energy monitoring. It’s easy to install on a DIN rail, saving space in your electrical panel. With Shelly’s design, you get reliable performance and simple energy management.
The device has an embedded web interface which can be used to monitor and control the device, as well as adjust its settings.
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LAN, Wi-Fi, and Bluetooth connectivity – LAN connection for high security and reliability. Simultaneous Wi-Fi and LAN usage, as backup when needed
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Accuracy class B (active energy) – Shelly Pro EM-50 has a measurement accuracy of 1%
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MODBUS support – Allows for easy and fast deployment in existing industrial installations
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4-quadrant measurement – Measure capacitive and inductive load types of active imported and exported energies
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Energy measurement – Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and at least 60 days of 1-minute records storage
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Scripting functionalities – Shelly Pro 3PM fully supports mJS scripting, allowing you to create further features and functionalities
Different types of actions, scenarios, and schedules can be set to sync your environment to your daily activities or business needs, via the Shelly smart home ecosystem, including the Shelly Smart Control app - or link it with a popular home automation software such as Home Assistant via a Raspberry Pi!
View our entire range of Shelly Pro and other professional home automation products.
Note: This device does not have a built-in relay. Contractor control is provided using a Shelly Pro Addon attached to the Shelly Pro 3EM-3CT63. You may require a neutral wire to use this product. Please research the device and your home wiring (safely, see below) before purchasing.
⚠️Caution - Read Before Buying⚠️
- Before beginning the installation, please read this guide and any other documents accompanying the device carefully and completely
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Danger of electrocution. The mounting/installation of the device should be performed by a qualified person (electrician)
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Failure to follow the installation procedures could lead to malfunction, danger to your health and life, violation of the law or refusal of legal and/or commercial guarantee (if any)
- Allterco Robotics (makers of Shelly products) and Mann Enterprises LTD are not responsible for any loss or damage in case of incorrect installation or improper operation of this device due to failure to follow the user and safety instructions in the printed guide accompanying this product (also available in the resources section below)
- Do not connect the device to appliances exceeding the given max load.
- Use the device only with a power grid and appliances which comply with all applicable regulations. Short circuit in the power grid or any appliance connected to the device may damage the device.
- Before starting, wire check that the breakers are turned off and there is no voltage on their terminals. This can be done with a phase meter or multimeter. When you are sure that there is no voltage, you can start wiring the cables.
Shelly Pro Series
Enhanced with temperature, overpower, and overvoltage load protection, the Shelly Pro series is designed to be installed inside the breaker box (DIN). Allowing full smart automation with no additional cables or wiring, the Shelly Pro line is perfect for homes, offices, stores, businesses, and manufacturing facilities, as well as new buildings.
View our entire range of Shelly Pro and other professional home automation products.
Five-year manufacturer warranty
All Shelly Pro products carry a five-year manufacturer warranty.
This warranty covers any issues with the hardware or firmware that exist at the time of purchase or that appear within the warranty period. The warranty includes all parts of the hardware, such as the body, mechanics, and display (if applicable). However, it does not cover consumable items like batteries or accessories, as their lifespan depends on how much they are used.
Features
- 4 Quadrant measurement
- DIN rail mounting
- Multiple connection types: three-phase or single-phase installations
- Current transformer connection: non-contact measurements.
- Phase sequence error detection* (option)
- Channel-to-channel calibration**
- No load threshold***
- Optical pulse indication of energy usage
- Real-time clock: stored data keeps correct timestamps even if the internet connection is interrupted. ****
- Data logs: up to 60 days of data stored on the device for later retrieval
- External contactor control: loads can be controlled based on device automation or scripts. Available with the addition of the Shelly 3EM Switch Add-on
- Accuracy Class B (IEC 62053-21)
- Photovoltaic ready
* The Device has phase sequence error detection circuits. This detection works on phase voltages and considers only the zero crossings. The regular succession of these zero-crossing events is Phase A followed by Phase B followed by Phase C. If the sequence of zero-crossing events is, instead, Phase A followed by Phase C followed by Phase B, then a phase_sequence error is reported when the Phase sequence error detection option is enabled.
** At least 500 W load is required for each channel.
*** In case the total load for the three channels drops below 30 VA per channel the measured power level will be displayed, but no consumed energy will be accumulated to the energy statistics and a No load threshold notification will be displayed in the Device web interface and the mobile application.
**** Shelly devices rely on internet connection for device clock. In case of installation network requirement or service interruption, the built-in clock provides correct timestamps for records.
Specifications
| Size (HxWxD) | 94x19x69 mm |
| Weight | 62g |
| Screw terminals max torque | 0.4 Nm / 3.5 lbin |
| Conductor cross-section | 0.5 to 2.5 mm² / 20 to 14 AWG |
| Conductor stripped length | 6 to 7mm |
| Mounting | DIN rail |
| Shell material | Plastic |
| Shell color | White |
| Ambient working temperature | -20°C to 40°C |
| Humidity | 30% to 70% RH |
| Max. altitude | 2000m |
| Power supply | 100-260 V~ 50/60 Hz |
| Power consumption | < 3 W |
| External protection | Tripping characteristic B or C, 16A max. rated current, min. 6 kA interrupting rating, energy limiting class 3 |
| Internal-temperature sensor | Yes |
| Voltmeter (AC) | 100 - 260 V |
| Voltmeter accuracy | ±1 % |
| Ammeter (AC) | 0 - 63 A |
| Ammeter accuracy | ±1 % (2 - 63 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A) |
| Compatible current transformers | 3CT63 |
| Power and energy meters | Active and apparent power; Active and apparent energy; Power factor; Fundamental active and fundamental reactive energy |
| Channel-to-channel calibration minimum load | 500 W per channel |
| No load threshold | 30 VA per channel |
| Measurement data storage | At least 60 days of 1 min data resolution |
| Data export | CSV for PQ recorded values; JSON format export through RPC |
| Wi-Fi Protocol | 802.11 b/g/n |
| Wi-Fi RF band | 2400 - 2495 МHz |
| Wi-Fi Max. RF power | < 20 dBm |
| Wi-Fi Range | Up to 30m indoors and 50m outdoors (Depends on local conditions) |
| Bluetooth Protocol | 4.2 |
| Bluetooth RF band | 2400 - 2483.5 MHz |
| Bluetooth Max. RF power | < 4 dBm |
| Bluetooth Range | Up to 10m indoors and 30m outdoors (Depends on local conditions) |
| CPU | ESP32-D0WDQ6 |
| Flash | 16 MB |
| Webhooks (URL actions) | 20 with 5 URLs per hook |
| Scripting | Yes |
| MQTT | Yes |
| Encryption | Yes |
Resources
Handy Shelly Resources
Package Contents
- 1x Shelly Pro 3EM 3CT 63
- 1x Shelly 3CT63 energy meter (with wire assemblies)
- 1x User Guide
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