Shelly Pro 3EM‑3CT63

The Shelly Pro 3EM‑3CT63 is a single- or three‑phase energy meter designed to mount directly over a circuit breaker. It uses a combined three‑phase current transformer and logs energy data locally for up to 60 days, as well as automatically to the cloud for analysis.

£112.99 inc VAT

SKU: PRO-3EM-3CT63 Category:
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Description

The Shelly Pro 3EM‑3CT63 is built for DIN‑rail installation inside a breaker box, positioned directly above the circuit breaker. It offers flexible connectivity options, supporting LAN for maximum reliability and security, as well as WiFi or Bluetooth for situations where alternative communication methods are needed. Its integrated 3‑phase current transformer measures up to 63A with 1% accuracy, making it well‑suited for monitoring a wide range of capacitive and inductive loads, including EV chargers and commercial energy‑management systems.

Beyond tracking the energy consumption of the system in which it is installed, the Shelly Pro 3EM‑3CT63 can also measure energy generation from renewable sources such as solar panels and wind turbines. When used alongside other Shelly devices in smart automation scenes, it can divert surplus energy to appliances or battery storage. Likewise, the Pro 3EM‑3CT63 can signal other Shelly devices to shut down non‑essential equipment once a predefined usage threshold is reached, helping reduce energy costs and lower your carbon footprint.

Key Features:

  • Built-in WiFi; no hub required
  • LAN connectivity
  • Bluetooth connectivity
  • Embedded web server for local management
  • Power metering
  • Smart schedules
  • Smart scenes
  • DIN rail mountable

What’s Included:

  • 1 x PRO-3EM-3CT63
  • 1 x Three-phase current transformer
  • 1 x Installation guide

Manuals & Data sheets:

Product Specifications

Physical and Performance Attributes

Weight62 grams
Dimensions (L x W x H)94 × 19 × 69 mm

Misc Product Attributes

Shelly Pro 3EM-3CT63 & Shelly 3CT63 — Technical Specifications
Specification Details
PHYSICAL
Size (H × W × D) Shelly Pro 3EM-3CT63: 94 × 19 × 69 mm / 3.70 × 0.75 × 2.71 in
Shelly 3CT63: 14 × 54 × 26 mm / 0.55 × 2.12 × 1.02 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 lbf·in
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 —
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 Supported
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 IEEE 802.11 b/g/n
Range Up to 50 m / 164 ft outdoors; up to 30 m / 98 ft indoors (depending on local conditions)
RADIO — 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 & FEATURES
CPU ESP32-D0WDQ6
Flash 16 MB
Webhooks (URL actions) 20 with 5 URLs per hook
Wi‑Fi range extender Yes
BLE Gateway Yes
Scripting Yes
MQTT Yes
Encryption Yes