Shelly
A Smart Home in Your Control

Make Your Home Smart and Convenient with Shelly.

Shelly is a comprehensive smart home automation system designed to bring convenience, energy efficiency, and enhanced security to your living space. With a wide range of products, Shelly allows you to control lighting, climate, appliances, and security systems through an intuitive mobile app or voice commands. Whether you want to automate your daily routines, set up custom scenarios, or remotely monitor your home, Shelly’s devices offer seamless integration and easy installation. Compatible with various smart home ecosystems, Shelly provides a reliable and flexible solution for modern home automation.

Shelly Pro 3EM 400A professional three-phase energy monitoring applications

---

Shelly Pro 3EM 400A professional three-phase energy monitoring applications

---

Code	S3800235268117
Manufacturer code	3800235268117
Availability	8 pc.
Usually ships within:	1-2 business days

- 10%

200.97 € 223.30

245.18 € inc. vat

add to favorites

Add to Cart

---

0% VAT ordering for EU companies (non EST) & Customers outside the EU

Fill VAT ID field with valid VAT number to automatically create a purchase order with 0% VAT.

We accept Credit cards, PayPal, and Bank wires

You can pay for your order comfortable and safe

Easy Returns

14 days for return for items in as new condition

20000+ Successful Worldwide Deliveries

We ship from Europe. Delivery time & cost:

Destination country

Albania

Angola

Argentina

Australia

Austria

Bahrain

Bangladesh

Belgium

Bolivia

Bosnia and Herzegovina

Botswana

Brazil

Bulgaria

Canada

Central African Republic

Chile

Colombia

Costa Rica

Cote D'Ivoire

Croatia

Cyprus

Czech Republic

Denmark

Egypt

Estonia

Fiji

Finland

France

French Polynesia

Gabon

Germany

Ghana

Gibraltar

Greece

Guadeloupe

Haiti

Hong Kong

Hungary

Iceland

India

Indonesia

Ireland

Israel

Italy

Jamaica

Japan

Jordan

Kenya

Korea, Republic of

Kuwait

Latvia

Liechtenstein

Lithuania

Luxembourg

Macedonia

Madagascar

Malaysia

Maldives

Malta

Mauritania

Mauritius

Mexico

Monaco

Morocco

Netherlands

New Caledonia

New Zealand

Nigeria

Norway

Oman

Peru

Philippines

Poland

Portugal

Qatar

Romania

San Marino

Saudi Arabia

Serbia and Montenegro

Seychelles

Singapore

Slovakia

Slovenia

South Africa

Spain

Sri Lanka

Sweden

Switzerland

Taiwan

Thailand

Turkey

Ukraine

United Arab Emirates

United Kingdom

United States of America

Venezuela

Viet Nam

Yemen

Zambia

Zimbabwe

UPS Express Saver - 85 € (85 € inc. vat)

Shelly Pro 3EM-400

Device identification

• Device name: Shelly Pro 3EM-400

• Device model: SPEM-003CEBEU400

• Device SSID: ShellyPro3EM400-XXXXXX

Short description

Shelly Pro 3EM-400 (The Device) is a DIN rail mountable three-phase energy meter. Enhanced with all the gen2 firmware flexibility and LAN connectivity, it provides professional integrators with additional options for end-customer solutions. 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 MQTT, HTTP, and WebSocket. All inbound connections support TLS.

The Device reports accumulated energy as well as instantaneous voltage, current, active, and apparent power per phase 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.

The Device has a real-time clock to keep the correct time if the connection to an SNTP server is lost.

Shelly Pro 3EM-400 can be accessed, set up, and monitored remotely by the User, as well as the Device can access and communicate with an automation system, as long as they are in the same network infrastructure.

The Device has an embedded Web Interface which can be used to monitor and control the device, as well as adjust its settings.

⚠NOTICE! The Device does not have a built-in relay. Contactor control is provided using a Shelly Pro Addon attached to the Shelly Pro 3EM-400.

Features

• 4 Quadrant measurement

• DIN rail mounting

• Multiple connection types

• Current transformer connection

• Phase sequence error detection* (option)

• Channel-to-channel calibration**

• No load threshold***

• Optical pulse indication of energy usage

• Real-time clock

• Data logs

• 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 5000 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.

Main applications

• Residential

• MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)

• Light commercial (small office buildings, small retail/restaurant/gas station, etc.)

• Industrial (factories, power plants, water processing, refineries, etc.)

• Agricultural (farms, barns, silos, etc.)

• Government/municipal

• University/college

Simplified internal schematics

Device electrical interfaces

Inputs

• 4 line inputs on screw terminals: 3 L and 1 N

• 4 current transformer inputs: 3 for L current measurements and 1 for N current measurement

Ethernet port

• 1 RJ45 connector

⚠CAUTION! Plug in or unplug the LAN cable only when the Device is powered off! The LAN cable connector must not be metallic in the parts touched by the user to plug in or unplug the cable.

Add-on interface

• Shelly proprietary serial interface

⚠CAUTION! High voltage on the add-on interface when the Device is powered!

Connectivity

• Wi-Fi

• Ethernet

• Bluetooth

Each connectivity option can be enabled or disabled by the user.

Safety features

• Internal temperature sensing and reporting

Supported load types

• Resistive (incandescent bulbs, heating devices)

• Capacitive (LED light drivers, capacitor banks, electronic equipment, motor start capacitors)

• Inductive (transformers, fans, refrigerators, air-conditioners)

User interface

Inputs

• One tactile dome button

  • Press briefly to toggle the state of the relay in the attached Shelly Pro 3EM Switch Add-on.

  • Press and hold for 5 sec to activate Device AP.

  • Press and hold for 10 sec to factory reset.

Outputs

• LED indication

  • Power: Red light if the power supply is connected.

  • Wi-Fi (varies):

    • Blue light if in AP mode.

    • Red light if in STA mode, and not connected to a Wi-Fi network.

    • Yellow light if in STA mode, and connected to a Wi-Fi network. Not connected to Shelly Cloud or Shelly Cloud disabled.

    • Green light if in STA mode, and connected to a Wi-Fi network and the Shelly Cloud.

    • The LED will be flashing Red/Blue if OTA update is in progress.

  • LAN: Green light if LAN is connected.

  • Count: Red light will be flashing when the Device is measuring energy according to settings with frequency dependent on the energy flowing through the measured circuit.

Specifications

Basic wiring diagrams

Legend