PowerBox

PowerBox

The more you know, the more you can do. Smart energy monitoring for your home.

PowerBox

PowerBox is part of the IoT family of solutions. It was designed and developed by 3City Electronics to serve as an advanced current analyzer. The device is capable of non-invasively analyzing 4 power lines simultaneously, offering a wide range of possibilities.
PowerBox

The integration of a high-performance processor with DSP acceleration in the PowerBox device allows for the precise recording of analog signals. Furthermore, it enables the execution of various algorithms to analyze the recorded signals, including power spectral density (up to the 15th harmonic), power factor, reactive power, and active power. Communication is based on Wi-Fi technology. The device can be easily configured and connected to a local router or server, where advanced signal analysis can be performed—such as comparing recorded signals against reference patterns to detect grid anomalies, or providing transparent logging of power parameters like reactive power. Moreover, communication is secured using TLS technology, ensuring safe data transfer. The device features a convenient and clear OLED display for presenting real-time measurements and configuring the connection. The enclosure is designed for compatibility with electrical distribution boxes and cabinets (3-module / 3M footprint, mounted on a standard 35mm DIN rail).

Technical details PowerBox

Processor
STM32 ? 32-bit ARM Cortex M4 100 MHz microcontroller with DSP acceleration
Connectivity
802.11 b/g/n (Wi-Fi), 1x micro USB, 4x 3.5 mm jack, RP-SMA antenna connector
Power supply
230 V AC, microUSB 5 V DC (for configuration)
Power consumption
Max. 1 W
Display
Monochrome OLED 128 x 64 pixels
Measurement
4 measurement channels with a range depending on the selected coil (5 A ? 60 A)
Enclosure
Flame-retardant plastic, 35 mm DIN rail mount
Dimensions
53.3 x 90.2 x 57.2 mm

  • 230 VAC mains voltage measurement from the device power supply phase (reference voltage)

  • Measurement of 4 currents in the 0?60 A range each (available coils: 5 A, 10 A, 15 A, 20 A, 25 A, 30 A, 50 A, 60 A) using external, non-invasive clip-on current transformers attached to the measured conductor

  • FFT algorithm for calculating frequency spectra of measured currents in the 0?750 Hz band (up to the 15th harmonic)

  • Data transmission in JSON format via HTTPS or MQTT, secured with TLS encryption

  • Remote firmware updates (OTA)

  • Built-in web server accessible during device configuration

  • 5 V relay for NO/NC circuit control

  • Core material: Ferrite
  • Input current: Depends on the selected transformer model
  • Max. conductor diameter: 13 mm
  • Output connector: 3.5 mm jack
  • Cable length: 1.5 m
  • Non-linearity: ?3% (from 10% to 120% of rated current)
  • Operating temperature: -25°C to +70°C

  • Operating temperature: -10°C to +50°C

  • Relative humidity: Up to 95% (non-condensing)

  • Ingress Protection (IP rating): IP20

  • Electromagnetic discharge protection: Up to 1.5 kV

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