Shelly Pro 3EM Three-Phase Energy Meter: User, Safety, and Installation Guide
Product Introduction
Shelly® devices are innovative microprocessor-managed products enabling remote control of electric circuits via mobile phone, tablet, PC, or home automation systems. They can operate standalone in a local Wi-Fi network or through cloud services. Shelly Cloud is accessible via Android/iOS apps or web browsers at https://home.shelly.cloud/. Devices can be monitored and controlled remotely with internet connectivity, provided they are connected to a Wi-Fi router and the internet. An embedded web interface is accessible at http://192.168.33.1 (or the device's IP address on the local network) for monitoring, control, and settings adjustment. Shelly® devices can communicate directly with other Wi-Fi devices via HTTP. Allterco Robotics EOOD provides an API, detailed at https://shelly-api-docs.shelly.cloud/#shelly-family-overview. Devices ship with factory-installed firmware. Allterco Robotics EOOD provides free firmware updates for conformity and security via the device's web interface or the Shelly mobile app. Users are solely responsible for installing updates.
Shelly® Pro Series
The Shelly® Pro series is designed for homes, offices, retail stores, manufacturing facilities, and other buildings. These devices are DIN rail mountable within breaker boxes, making them ideal for new construction. Shelly® Pro devices support control and monitoring via Wi-Fi and LAN connections, with Bluetooth available for the inclusion process.
The Shelly Pro 3EM is a DIN rail mountable three-phase energy meter. It reports accumulated energy, voltage, current, and power factor data in real-time. Data is stored in non-volatile memory for at least 60 days with 1-minute resolution.
Schematic and Legend
The device features specific terminals for connecting power and current transformers, along with cables for each phase and neutral.
Schematic Diagram (Fig. 1)
The diagram illustrates the physical connections for the Shelly Pro 3EM. It shows the device's terminals and how to connect the current transformers (CTs) and power cables.
Legend
Device Terminals:
- A: Phase A input
- B: Phase B input
- C: Phase C and Device power supply input
- N: Neutral input
- IA: Phase A current transformer (CTA) input
- IB: Phase B current transformer (CTB) input
- IC: Phase C current transformer (CTC) input
- IN: Neutral current transformer (CTN) input
Cables:
- LA: Phase A (110-240 VAC)
- LB: Phase B (110-240 VAC)
- LC: Phase C (110-240 VAC)
- N: Neutral cable
Installation Instructions
CAUTION! Danger of electrocution. Installation must be performed by a qualified electrician.
CAUTION! Ensure no voltage is present at the device terminals before making any connection changes.
CAUTION! Use the device only with power grids and appliances complying with applicable regulations. Short circuits may damage the device.
CAUTION! Do not connect appliances exceeding the specified maximum load.
CAUTION! Follow instructions precisely; other methods may cause damage or injury.
CAUTION! Do not install where the device can get wet.
CAUTION! Plug/unplug LAN cable only when the device is powered off. Ensure the LAN cable is not metallic where touched by the user.
RECOMMENDATION: Use solid single-core cables with insulation heat resistance not less than PVC T105°C (221°F).
Installation Steps:
- Before starting, turn off breakers and verify no voltage is present on terminals using a phase tester or multimeter.
- Following Fig. 1, install the current transformer CTA around the Phase A cable to the load(s), CTB around the Phase B cable, and CTC around the Phase C cable. Install CTN around the Neutral cable from the load(s).
- Mount the Device onto the DIN rail.
- Plug the CTA, CTB, and CTC cables into the Device's IA, IB, and IC input connectors, respectively. Plug the CTN cable into IN.
- Mount circuit breakers according to local regulations.
- Connect the Phase A, Phase B, and Phase C cables through the breakers to the Device's A, B, and C inputs. Connect the Neutral cable to the N input.
- The Device is powered via its C input.
- Ensure all connections are correct, then turn on the circuit breakers.
Initial Inclusion
For Shelly Cloud integration, follow instructions in the "App Guide" for connecting the device and controlling it via the Shelly App. The app and cloud service are optional; the device functions standalone or with other home automation platforms.
CAUTION! Keep Shelly remote control devices (phones, tablets, PCs) away from children. Do not allow children to play with buttons/switches connected to the device.
LED Indication
- Power: Red light if power supply is connected.
- Wi-Fi (varies):
- Blue light: AP mode
- Red light: STA mode, not connected to Wi-Fi
- Yellow light: STA mode, connected to Wi-Fi, but not to Shelly Cloud or Shelly Cloud disabled
- Green light: STA mode, connected to Wi-Fi and Shelly Cloud
- Flashing Red/Blue: OTA update in progress
- LAN: Green light if LAN is connected.
- Count: Red light flashes when measuring energy, frequency dependent on energy flow.
User Button
- Press and hold for 5 seconds to activate Device AP.
- Press and hold for 10 seconds for factory reset.
Specifications
| Feature | Specification |
|---|---|
| Dimensions (HxWxD) | 94x19x69 mm / 3.70x0.75x2.71 in |
| Mounting | DIN rail |
| Ambient Temperature | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity | 30 % to 70 % RH |
| Max. Altitude | 2000 m / 6562 ft |
| Power Supply | 110 - 240 VAC, 50/60Hz |
| Electrical Consumption | < 3 W |
| Internal Temperature Sensor | Yes |
| Voltmeters (RMS for each phase) | 100 - 260 V |
| Voltmeters Accuracy | ±1 % |
| Ammeters (RMS via CT for each phase and Neutral) | 0 - 120 A |
| Ammeters Accuracy | ±1 % (2 - 120 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A) |
| Phase Sequence Error Detection | Yes (option) |
| Power and Energy Meters | Active and apparent power, Active and apparent energy, Power factor, Fundamental active and fundamental reactive energy |
| Measurement Data Storage | At least 60 days of 1 min data resolution |
| Data Export | CSV for PQ recorded values, JSON format export via RPC |
| Wi-Fi Protocol | 802.11 b/g/n |
| Wi-Fi Frequency | 2412 - 2472 MHz (Max. 2483 MHz) |
| Wi-Fi Max. RF Output Power | 15 dBm |
| Wi-Fi Operational Range | Up to 50 m / 160 ft outdoors, Up to 30 m / 100 ft indoors |
| Bluetooth Protocol | BLE 4.1 |
| Bluetooth Frequency | 2402 - 2480 MHz (Max. 2483.5 MHz) |
| Bluetooth Operational Range | Up to 30 m / 100 ft outdoors, Up to 10 m / 33 ft indoors |
| Bluetooth Max. RF Output Power | 5 dBm |
| CPU | ESP32 |
| Flash | 16 MB |
| Webhooks (URL actions) | 20 with 5 URLs per hook |
| Scripting | mJS |
| MQTT | Yes |
Declaration of Conformity
Allterco Robotics EOOD declares that the radio equipment type Shelly Pro 3EM complies with Directive 2014/53/EU, 2014/35/EU, 2014/30/EU, 2011/65/EU. The full text of the EU declaration of conformity is available at: https://shelly.cloud/knowledge-base/devices/shelly-pro-3em/
Manufacturer:
Allterco Robotics EOOD
Address: 103 Cherni vrah Blvd., 1407 Sofia, Bulgaria
Tel.: +359 2 988 7435
E-mail: support@shelly.cloud
Official website: https://www.shelly.cloud
Changes in contact information are published on the official website: https://www.shelly.cloud
All rights to the Shelly® trademark and other intellectual rights associated with this Device belong to Allterco Robotics EOOD.
