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Input voltage compensation

Oxygen 10-40: ±10% cont. / -40% for 1 min. (100% Vout)
Oxygen 15-50: ±15% cont. / -50% for 1 min. (100% Vout)
Standard features

Voltage regulation IGBT control (double conversion technology)
Voltage stabilisation Independent phase control
Available nominal voltage* 380-400-415V (440-460-480V**)
Output voltage accuracy ±0,5%
Frequency 50Hz ±5% or 60Hz ±5%
Correction time <3 millisecs
Admitted load variation Up to 100%
Admitted load imbalance 50%
Cooling Forced ventilation
Operating temperature range 0/+40°C
Max relative humidity <95% (non condensing)
Admitted overload 150% for 1 minute (at nominal imput voltage)
Colour RAL 9005
Protection degree IP21
User interface 10″ color touch panel, multilingual (on request
remotely available by dedicated software
connected to the same network – Ethernet)
Installation Indoor
Communication system MODBUS RTU (RS485)
Overvoltage protection Input class I surge arrestors
Output class II surge arrestors
Protection Automatic by-pass protection

* The output voltage can be adjusted by choosing one of the indicated values.

Such choice sets the new nominal value as a reference for all the stabilizer parameters.
** 60Hz only.

  • Input automatic circuit breaker
  • Short circuit output protection
  • Manual maintenance by-pass
  • Input isolating transformer
  • EMI/RFI filters
  • IP54 protection degree for indoor and outdoor installation

Oxygen, thanks to a suitable sizing of the power components and a remarkable response speed (

The energy required is taken directly from the network.

The voltage compensation on the buck/boost primary winding is performed by IGBT static switches controlled by a microcontroller. The microcontroller system monitors the output voltage and determines the opening or closing of the IGBT contacts ensuring the best regulation.

The use of the double conversion technology guarantees the insulation from the disturbances and the distortions of the network and, together with the help provided by the electrolytic capacitors, makes it possible to build machines for high power loads.

This Sag compensator can operate with a load variation range for each phase from 0 to 100%, it is not affected by the power factor of the load and they can work with or without the neutral wire.

Oxygen can operate with different input and, consequently, output voltage (380V or 415V) from the nominal one (400V).

The main components are:

  • IGBT microcontroller-based electronic control boards running the system in terms of regulation and alarm management. They compare the output voltage value to the set one: if a difference is detected, they generate the compensation necessary to bring back the output voltage to the nominal value (provided that said difference falls in the working range).
  • Conversion units (AC/DC rectifier and DC/AC inverter):Rectifier: it converts the phase to neutral voltage of the AC mains into DC voltage by means of a fully-controlled IGBT bridge. The rectifier is sized in order to supply the inverter at full load.Inverter: it converts the DC voltage coming from the rectifier into AC voltage, stabilised in amplitude. The inverter uses the same IGBT technology as the rectifier.
  • Internal by-pass static switch enabling load supply in case of fault condition.
  • Buck/boost transformer adding or substracting the voltage necessary to compensate for the mains fluctuation.
  • Touch display.

The user interface is created using a multilingual «touch panel» (10″); through the selection menu, it is possible to display electrical values and set the operating parameters of the stabilizer.

It is also possible to communicate with the electronic component via the RS485 serial bus using the Modbus RTU protocol.

The standard cabinet is metallic with RAL9005 color and IP21 protection degree.

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