SIRIUS stabilisers are equipped with columnar voltage regulators which make possible to achieve high ratings (up to 6000kVA) and a solid and reliable construction, so that any industrial need can be met. The three-phase SIRIUS line allows for the choice of several input voltage variation percentages within a broad range (from +30% down to -45%).

The SIRIUS 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 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 / Standard features

Voltage stabilisation Independent phase control
Output voltage selectable via display, PC and/or Ethernet – from 210V to 255V (L-N)
– from 360V to 440V (L-L)
Frequency 50/60Hz ±5%
Admitted load variation Up to 100%
Admitted load imbalance 100%
Cooling Natural air ventilation (aided with fans over 45°C)
Ambient temperature -25/+45°C
Storage temperature -25/+60°C
Max relative humidity 95%
Admitted overload 200% 2min
Harmonic distortion None introduced
Colour RAL 7035
Protection degree IP 21
Instrumentation – Input and output digital multimetre with RS485 port5
– LCD display
Installation Indoor
Regulator overload protection Digital control
Sistema di comunicazione Ethernet / GPRS / USB / MODBUS TCP/IP
Overvoltage protection – Input class I surge arrestor
– Output class II surge arrestor
– Soft start through supercapacitors in case of blackout

SIRIUS / Rating in relation

± 10% ± 15% ± 20% ± 25% ± 30% + 15/-35% + 15/-45%
200 125 100 80 60 80 60
250 160 125 100 80 100 80
320 200 160 125 100 125 100
400 250 200 160 125 160 125
500 320 250 200 160 200 160
630 400 320 250 200 250 200
800 500 400 320 250 320 250
1000 630 500 400 320 400 320
1250 800 630 500 400 500 400
1600 1000 800 630 500 630 500
2000 1250 1000 800 630 800 630
2500 1600 1250 1000 800 1000 800
3200 2000 1600 1250 1000 1250 1000
4000 2500 2000 1600 1250 1600 1250
5000 3200 2500 2000 1600 2000 1600
6000 4000 3200 2500 2000 2500 2000