Shelly EM Gen 3 con transformador de 50 amperios

Device identification

Name: Shelly EM Gen3

Model: S3EM-002CXCEU

Device SSID: ShellyEMG3-XXXXXXXXXXXX

BLE Model ID: 0x1027

Short description

Shelly EM Gen3 is a compact smart energy meter supporting up to two current transformers for
non-contact power monitoring. It allows precise metering of energy consumption and provides real-time
reports through Wi-Fi or cloud-based home automation systems. The device also includes a dry contact relay
for external load control and internal storage capable of keeping minute-level data records for up to 10 days.
With its small size, Shelly EM Gen3 can be installed in standard electrical wall boxes, behind power sockets,
or in areas with limited space, offering flexibility for both residential and commercial monitoring.

Main features

• Compact form factor for flexible installation
• Single-phase, dual-channel energy measurement
• Current transformer connection for non-invasive monitoring
• Integrated dry contact relay for contactor control
• Real-time clock with internal data logging
• Stores up to 10 days of minute-resolution energy data
• Local web interface for configuration, control, and monitoring
• Supports standalone operation or cloud-based control

Use cases

• Power consumption monitoring: Track and analyze real-time energy usage of connected devices.
• Energy efficiency optimization: Identify consumption trends to reduce waste and optimize usage.
• Appliance health check: Detect irregular power draw to identify faulty appliances early.
• Cost management: Estimate and manage the operating costs of specific appliances.
• Space-efficient retrofitting: Install easily in wall boxes or behind sockets for compact setups.
• Remote monitoring: View power data remotely through Shelly Cloud or other cloud services.
• Local monitoring: Use local UI and automation based on real-time or accumulated power consumption.

Main applications

• Residential
• MDU (apartments, condominiums, hotels)
• Light commercial (offices, retail, restaurants, gas stations)
• Government / municipal buildings
• University / college facilities
• Farming and agricultural automation

Simplified internal schematics

EM-Gen3-internal-schematics.png

Connectivity

Wi-Fi

Bluetooth

Protocols

MQTT

HTTP

WebSocket

RPC

Safety function

Internal temperature sensing and reporting

Supported load types

• Resistive (incandescent bulbs, heating devices)
• Capacitive (LED drivers, capacitor banks, electronic equipment)
• Inductive (motors, fans, transformers, compressors, air-conditioners)

User interface

Inputs:

One (Control) button

• Hold for 5 seconds → Enable device access point and Bluetooth connection

• Hold for 10 seconds → Factory reset

Outputs:

LED (monocolor) indication

• AP enabled, Wi-Fi disabled → 1s ON / 1s OFF

• Wi-Fi enabled, not connected → 1s ON / 3s OFF

• Connected to Wi-Fi → Constantly ON

• Cloud enabled, not connected → 1s ON / 5s OFF

• Connected to Shelly Cloud → Constantly ON

• OTA update → ½s ON / ½s OFF

• Button held 5s → ½s ON / ½s OFF

• Button held 10s → ¼s ON / ¼s OFF

The LED indication list is prioritized — each subsequent state overrides the previous one.

Físico

Tamaño (alto x ancho x profundidad):37×42×16 mm / 1,46×1,65×0,63 pulgadas

Peso:EM Gen3: 23 g / 0,81 oz; CT 50A: 50 g / 1,76 oz

Par de apriete de los terminales de tornillo:0,4 Nm (3,5 lbf·in)

Tamaño del conductor:0,2–2,5 mm² (24–14 AWG; casquillos sólidos, trenzados y de cordón)

Longitud de la tira:6–7 mm (0,24–0,28 pulgadas)

Montaje:Consola de pared, Armario eléctrico

Material de la carcasa:Plástico

Color de la carcasa:Blanco, gris carbón

Color de los conectores:Negro

Ambiental

Temperatura ambiente:−20 °C a 40 °C (−5 °F a 105 °F)

Humedad:30–70% de humedad relativa

Altitud máxima:2000 m (6562 pies)

Eléctrico

Fuente de alimentación:110–240 V~ 50/60 Hz

Consumo de energía:< 1,2 W

Se requiere neutralidad:Sí / No

Protección externa:2 A, característica de disparo B o C; clasificación de interrupción de 6 kA; clase de limitación de energía 3

Clasificaciones de salida

Tensión máxima de conmutación:240 V~

Corriente máxima de conmutación:2 A / 240 V~

Sensores y medidores

Voltímetro (CA):110–240 V~ 50/60 Hz

Precisión del voltímetro:±2%

Amperímetro (CA):0–80 A

Precisión del amperímetro:±2 % (2–50 A), ±2 % (1–2 A), ±5 % (0–1 A)

Transformadores de corriente compatibles:CT 50A (incluido); CT 80A

Medidores de potencia y energía:Potencia activa y aparente; energía activa y aparente; factor de potencia; energía activa fundamental y reactiva fundamental

Carga mínima de calibración de canal a canal:500 vatios

Umbral sin carga:30 VA por canal

Almacenamiento de datos de medición:Al menos 10 días con una resolución de datos de 1 minuto

Exportación de datos:CSV para valores registrados de PQ; exportación en formato JSON mediante RPC

Sensor de temperatura interna:Sí

Radio

Protocolo Wi-Fi:802.11b/g/n

Banda RF de Wi-Fi:2412–2472 MHz

Potencia máxima de RF de Wi-Fi:<20 dBm

Alcance de Wi-Fi:Hasta 30 m/100 pies en interiores; 50 m/160 pies en exteriores (depende de las condiciones)

Protocolo Bluetooth:4.2

Banda RF de Bluetooth:2402–2480 MHz

Potencia máxima de RF de Bluetooth:< 4 dBm

Alcance de Bluetooth:Hasta 10 m/33 pies en interiores; 30 m/100 pies en exteriores (depende de las condiciones)

MCU

UPC:ESP-Shelly-C38F

Destello:8 MB

Capacidades del firmware

Horarios:Sí

Webhooks:20 (hasta 5 URL cada una)

Scripting:Sí

MQTT:Sí

Cifrado:Sí (Nivel de transporte)

Autenticación:Sí (Nivel de aplicación y transporte)