Control unit for protection and control of motors in ventilation systems

  • Projected to consent the protection of low power electric motors
  • Management of the forced ventilation in the electric power transformers
  • Electronic system of reading of the nominal current absorbed from the engines
  • Driving and protection of two independent groups of motors which could be commanded in manual or in automatic mode with a remote input command
  • Each branch is able to command loads with current up to 5A
  • Initial self-calibration
  • Rapid action when check an anomalous absorption of current
  • The alarm will be generated in the following situations:
    1. excessive absorption of current, (one or more motors could be overloaded from anomalous mechanics causes (for example block of the impeller in the fans system)
    2. missing absorption of current, (one or more fan motors don’t have power supply for any motive, the ventilation of the electric machine could result insufficient)

Technical features


  • Box 90x90x130 mm included terminal blocks
  • Front panel 96×96 mm
  • Weight 0,5 Kg

Power Supply

  • Power supply (220÷240) Volt AC ± 10% 50/60Hz


  • Two PTC probes
  • Remote control


  • Fault relay 250V AC, 5A maximum resistive, one switch contact
  • Fan motor 1, max 5A 220÷240V AC 50-60Hz ±10%
  • Fan motor 2 max 5A 220÷240V AC 50-60Hz ±10%


  • Self-extinguishable NORYL Box
  • Protection degree front panel in polycarbonate: Ip65 (IP66 on request)
  • Protection degree of rear panel on terminal board side: IP20
  • Display with light segments
  • Measurement and control of current absorbed by fan motors on two independent lines
  • Auto-calibration of rated current absorbed by each ventilation line
  • Generation of warning signals in case of current consumption greater or lower than the nominal current measured upon auto-calibration, over temperature of at least one fan motor
  • Operating mode (via remote control of ventilation system): automatic, manual or channel scan
  • Maximum management flexibility and ease of programming
  • Continuous storage of planned and reached values
  • Working temperature of device from -20°C to 60°C
  • Max allowed dampness in the room 90% not condensing
  • Electrical connections with fast polarised connectors
  • Technical manual in two languages (and more on request)
  • Construction in accordance with rule EN61000-6-2:2005 2014/30/EU
  • Input filter for power supply in accordance with rules
  • Tropicalization (optional)