Shelly Pro 3EM 3CT 63
The Shelly Pro 3EM-3CT63 is a next-generation DIN rail energy meter designed for single or three-phase installations. It includes a combined 63A three-phase current transformer for accurate, non-contact current measurement and advanced energy monitoring.
Ideal for commercial, industrial, and photovoltaic applications, it provides precise four-quadrant measurement, detailed logging, and reliable timestamp accuracy even during network interruptions.
Important:
This device does not include a built-in relay. Contactor control requires a compatible Shelly Pro Add-on.
Features
4-quadrant energy measurement
Supports single-phase and three-phase installations
DIN rail mounting
63A combined three-phase current transformer (non-contact measurement)
Optical pulse indication of energy usage
Real-time clock with stored timestamps
Up to 60 days of on-device data logging
External contactor control via Shelly Pro Add-on
Suitable for photovoltaic systems
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Quantity |
Value |
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Physical |
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Size (HxWxD): |
Shelly Pro 3EM-3CT63: 94x19x69 mm / 3.70x0.75x2.71 in Shelly 3CT63: 14x54x26 mm / 0.55x2.12x1.02 in |
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Weight: |
Shelly Pro 3EM-3CT63: 62 g / 2.19 oz Shelly 3CT63: 32 g /1.12 oz |
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Screw terminals max torque: |
0.4 Nm / 3.5 lbin |
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Conductor cross section: |
Shelly Pro 3EM-3CT63: 0.5 to 2.5 mm² / 20 to 14 AWG Shelly 3CT63: 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules) |
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Conductor stripped length: |
6 to 7 mm / 0.24 to 0.28 in |
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Mounting: |
Shelly Pro 3EM-3CT63: DIN rail Shelly 3CT63: Freestanding on phase wires |
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Conductor aperture Shelly 3CT63: |
Ø9 mm / Ø0.35 in |
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Shell material: |
Plastic |
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Shell color: |
White |
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Environmental |
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Ambient working temperature: |
-20°C to 40°C / -5°F to 105°F |
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Humidity: |
30% to 70% RH |
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Max. altitude: |
2000 m / 6562 ft |
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Electrical |
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Power supply: |
100-260 V~ 50/60 Hz |
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Power consumption: |
< 3 W |
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External protection: |
Tripping characteristic B or C, |
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Shelly 3CT63 electrical strength: |
1000 V~, 60 sec |
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Sensors, meters |
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Internal-temperature sensor: |
Yes |
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Voltmeter (AC): |
100 - 260 V |
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Voltmeter accuracy: |
±1 % |
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Ammeter (AC): |
0 - 63 A |
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Ammeter accuracy: |
±1 % (2 - 63 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A) |
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Compatible current transformers: |
3CT63 |
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Power and energy meters: |
Active and apparent power Active and apparent energy Power factor Fundamental active and fundamental reactive energy |
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Channel-to-channel calibration minimum load: |
500 W per channel |
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No load threshold: |
30 VA per channel |
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Measurement data storage: |
At least 60 days of 1 min data resolution |
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Data export: |
CSV for PQ recorded values JSON format export through RPC |
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Radio |
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Wi-Fi |
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Protocol: |
802.11 b/g/n |
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RF band: |
2400 - 2495 МHz |
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Max. RF power: |
< 20 dBm |
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Range: |
Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors |
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Bluetooth |
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Protocol: |
4.2 |
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RF band: |
2400 - 2483.5 MHz |
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Max. RF power: |
< 4 dBm |
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Range: |
Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
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Microcontroller unit |
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CPU: |
ESP32-D0WDQ6 |
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Flash: |
16 MB |
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Firmware capabilities |
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Webhooks (URL actions): |
20 with 5 URLs per hook |
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Scripting: |
Yes |
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MQTT: |
Yes |
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Scripting: |
Yes |
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Encryption: |
Yes |
Important: All electrical installation work must be performed by a qualified and licensed electrician. Failure to comply may void product warranties and breach electrical safety laws.
