SIRIUS Advance stabilisers are equipped with columnar voltage regulators which make possible to achieve high ratings (up to 4000kVA) and a solid and reliable construction, so that any industrial need can be met. The three-phase SIRIUS Advance line allows for the choice of several input voltage variation percentages within a broad range (from +30% down to -45%).

The SIRIUS Advance type can be used when the mains phases are asymmetrical and it is suitable for supplying unbalanced three-phase loads, two-phase loads and single-phase loads. The SIRIUS Advance voltage stabilisers perform an independent regulation on each phase.

The presence of the neutral wire is therefore required. The stabiliser can also operate without neutral wire by adding a D/zn isolating transformer or a neutral point reactor). The stabilisers are air cooled (natural convection up to 45°C, assisted by fans when the temperature exceeds said value).

The measuring instrumentation is incorporated in the control panel on the cabinet door and consists of two multi-task digital line analysers. Such instruments are able to provide with information regarding the status of the lines upstream and downstream the voltage stabiliser such as phase and linked voltage current, frequency, power factor, active power, apparent power and reactive power.

The readings are stored locally by the control system and (if the Ethernet connection is established) sent to a server at Ortea HQ, thus providing the Service centre with the necessary information. The front panel is provided with a user-friendly LED interface which allows for a complete monitoring of the unit. LED lights are provided for each phase signalling «power on», reaching of voltage regulation limits and direction of voltage regulation (increase/decrease). Alarms for minimum and maximum voltages, maximum current, over-temperature, cabinet overheating and maintenance required are also indicated. The alarm indicators are accompanied by an acoustic alarm.

Monitoring activities can be run remotely by installing on a PC (connected to the stabiliser via Ethernet) the STABIMON software provided with the unit. It is also possible to communicate with the stabiliser with the Modbus TCP/IP protocol (standard communication protocol between electronic industrial equipment) via an Ethernet connection with RJ45 cable.

The control system is able to interface with the Internet thanks to its capability to connect with ETHERNET and GPRS protocols. This allows for a remote monitoring of the equipment made by ORTEA at its headquarters, thus guaranteeing prompt assistance worldwide.

The control system is also provided with two USB ports for downloading the stored data on a memory key and uploading setting parameters if operating modifications in the system are needed. Also, the control firmware can be updated either through the USB port or via the Ethernet connection.

The SIRIUS stabiliser is provided with an electronic voltage regulator protection system activates in case of overload on the voltage regulator. In such condition the load supply is not interrupted, but the stabiliser output voltage is automatically set to the lower between the mains voltage and the pre-set output voltage. The service continuity is guaranteed, although the voltage is not stabilised. When the overload condition ceases to exist, the stabiliser switches automatically back to regular functioning.

The control logic, performed on the true RMS voltage, is based on two 2-way DSP microprocessor (one performing the control and the other one managing the measurements). The user can monitor the system and set all the parameters of the stabiliser via a PC connection.

The whole system is supervised by a third bodyguard microprocessor controlling the correct functioning of the other microprocessors. The output voltage is reset to the minimum value in case of blackout by means of supercapacitor banks in order to ensure the correct shutdown. All SIRIUS stabilisers are provided with Class I and Class II SPD surge arrestors.

SIRIUS Advance voltage stabilisers derive from the SIRIUS type, the standard integration of some functions and accessories usually offered as optional, complete and enrich the equipment.

The additional features are: Input automatic circuit breaker; Bypass switch via an interlocked automatic circuit breaker; Output interlocked motorized automatic circuit breaker; Integrated automatic power factor correction system. The input automatic circuit breaker (QF1) ensures protection against failure and/or short-circuits inside the unit. The bypass automatic circuit breaker (QF2) protects the line supplying the load against overload and short-circuits in bypass condition. The output motorized automatic circuit breaker (QF3), interlocked with the bypass switch, protects against overload, shortcircuit, overvoltage, undervoltage, phase sequence error and phase failure. The integrated automatic Power Factor Correction system maintains the power factor value (cos φ) to a high level ensuring the known advantages for the users but also affecting the sizing of the stabiliser. The PFC system exploits high energy density metallised polypropylene three-phase capacitors (Un=525V) exclusively thus guaranteeing rob stness and reliability. The addition of blocking reactors (detuned filters) eliminates undesired harmonics and protects the capacitors. The reactive power controller is mounted on the external control synoptic panel

Rating in relation to the input variation percentage


±20% ±25% ±30% +15/-35%



100 80 60 80



125 100 80 100



160 125 100 125



200 160 125 160



250 200 160 200



320 250 200 250



400 320 250 320



500 400 320 400



630 500 400 500



800 630 500 630



1000 800 630 800



1250 1000 800 1000



1600 1250 1000 1250



2000 1600 1250 1600



2500 2000 1600 2000



3200 2500 2000 2500


Standard features

Voltage stabilisation

Independent phase control

Output voltage selectable via displya, PC and/or Ethernet

from 210V to 255V (L-N)
from 360V to 440V (L-L)


50/60Hz ±5%

Admitted load variation

Up to 100%

Admitted load imbalance



Natural air ventilation (aided with fans over 45°C)

Ambient temperature


Storage temperature


Max relative humidity


Admitted overload

200% 2min

Harmonic distortion

None introduced


RAL 7035

Protection degree

IP 21


– Input and output digital multimetre with RS485 port
– LCD display
– Reactive power regulator



Regulator overload protection

Digital control

Communication system


Overvoltage protection

– Input class I surge arrestor
– Output class II surge arrestor
– Soft start through supercapacitors in case of blackout

Total protection by-pass kit

– Input automatic circuit breaker to protect against short-circuit
– Bypass switch made of an interlocked automatic circuit breaker to protect against short-circuit
– Output motorized automatic circuit breaker to protect against overload, overvoltage, undervoltage, phase sequence error and phase failure

Integrated automatic power factor correction system

– Based on energy density metallised polypropylene three-phase capacitors (Un = 525V)
– Three-phase blocking reactor (tuning frequency: 180Hz)