DIN rail mountable single or three-phase energy meter
Shelly Pro 3EM-3CT63 is a DIN rail mountable single or three-phase energy meter. It comes with a combined 3-phase current transformer (CT) that is designed to be mounted directly over a circuit breaker. Shelly Pro 3EM-3CT63 measures energy use accurately and can be used in many settings, such as monitoring industrial machines, saving energy in homes or offices, and managing electrical loads.
*NOTICE! This device does not have a built-in relay. Contactor control is provided using a Shelly Pro Addon attached to the Shelly Pro 3EM-3CT63.
- 4 Quadrant measurement
- DIN rail mounting
- Multiple connection types: Three phase or single phase installations
- Current transformer connection: Non-contact measurements.
- 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
- Photovoltaic ready
Shelly Pro 3EM comes with a specially designed by 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.
LAN connection for high security and reliability. Simultaneous Wi-Fi and LAN usage, as back up when needed.
Measure capacitive and inductive load types of active imported and exported energies.
Shelly Pro 3EM-3CT63 has a
measurement accuracy of 1%.
Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and at least 60 days of 1-minute records storage.
Allows for easy and fast deployment in existing industrial installations.
Shelly Pro 3EM-3CT63 fully supports
mJS scripting, allowing you to create further
features and functionalities.
Use Cases for your home
Monitor the energy consumption of your electric vehicle charger in real-time. Shelly Pro 3EM with the 3-phase current transformer (3CT63) can track how much power your EV charger uses, helping you manage and optimize energy consumption, ensuring that your home stays within its energy budget.
If your home is equipped with solar panels, Shelly Pro 3EM-3CT63 can measure the energy generated by your solar system, as well as the energy consumed from the grid. This helps in optimizing energy usage, ensuring that you maximize the use of solar energy and reduce dependency on grid power.
Use Shelly Pro 3EM-3CT63 to monitor the energy usage across your entire home. By tracking consumption across all three phases, you can identify which appliances or systems are using the most power, allowing you to make informed decisions to reduce energy costs and improve efficiency.
Use Cases for your business
For large commercial buildings, Shelly Pro 3EM-3CT63 can monitor energy usage across various floors or departments. This allows facility managers to allocate energy costs more accurately, identify energy wastage, and implement strategies to improve overall energy efficiency.
In a manufacturing plant, Shelly Pro 3EM-3CT63 can be used to monitor the energy consumption of heavy machinery across different phases. By tracking real-time usage, you can identify inefficiencies and reduce operational costs by optimizing energy usage during peak and off-peak hours.
If you are store owner, you can use Shelly Pro 3EM-3CT63 to monitor the energy consumption of key systems like lighting, HVAC, and refrigeration units. By tracking the power usage of these systems in real-time, store owners can identify when and where energy is being wasted—such as leaving lights on after hours or running HVAC systems inefficiently. This allows for better control over operating costs, helps in reducing energy bills, and supports sustainable business practices by lowering overall energy consumption.
| Physical | |
|---|---|
| Size (HxWxD): | Shelly Pro 3EM-3CT63: 94x19x69 mm / 3.70x0.75x2.71 in |
| Shelly 3CT63: | 14x54x26 mm / 0.55x2.12x1.02 in |
| Weight: | Shelly Pro 3EM-3CT63: 62 g / 2.19 oz |
| Shelly 3CT63: | 32 g /1.12 oz |
| CT aperture: | Ø9 mm / Ø0.35 in |
| Wire diameter: | 6 mm / 10 AWG |
| Screw terminals max torque: | 0.4 Nm / 3.5 lbin |
| Conductor cross section: | Shelly Pro 3EM-3CT63: 0.5 to 2.5 mm² / 20 to 14 AWG (solid, stranded, and bootlace ferrules) |
| Shelly 3CT63: | 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules) |
| Conductor stripped length: | 6 to 7 mm / 0.24 to 0.28 in |
| Mounting: | Shelly Pro 3EM-3CT63: DIN rail |
| Shelly 3CT63: | Freestanding on phase wires |
| Shell material: | Plastic |
| Shell color: | White |
| Environmental | |
| Ambient working temperature: | -20°C to 40°C / -5°F to 105°F |
| Humidity: | 30% to 70% RH |
| Max. altitude: | 2000 m / 6562 ft |
| Electrical | |
| Power supply: | 100 - 260 V~ 50/60 Hz |
| Power consumption: | < 3 W |
| Shelly 3CT63 electrical strength: | 1000 V~, 60 sec |
| Sensors, meters | |
| Internal-temperature sensor: | Yes |
| Voltmeters (RMS for each phase): | 100 - 260 V |
| Voltmeters accuracy: | ±1 % |
| Ammeters (RMS via CT for each phase and the Neutral): | 0 - 63 A |
| Compatible CT: | 3CT63 |
| Ammeters accuracy: | ±1 % (2 - 63 A), |
| ±2 % (1 - 2 A), | |
| ±5 % (0 - 1 A) | |
| 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 | |
| Radio | |
| Wi-Fi | |
| RF band: | 2400 - 2495 MHz |
| Max. RF power: | < 20 dBm |
| Protocol: | 802.11 b/g/n |
| Range: | Up to 50 m / 164 ft outdoors, up to 30 m / 98 ft indoors (depending on local conditions) |
| Bluetooth | |
| Protocol: | 4.2 |
| RF band: | 2400-2483.5 MHz |
| Max. RF power: | <4 dBm |
| Range: | Up to 30 m / 98 ft outdoors, up to 10 m / 33 ft indoors (depending on local conditions) |
| Microcontroller unit | |
| CPU: | ESP32-D0WDQ6 |
| Flash: | 16 MB |
| Firmware capabilities | |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Wi-Fi range extender: | Yes |
| BLE Gateway | Yes |
| Scripting: | Yes |
| MQTT: | Yes |
| Encryption: | Yes |
