A voltage stabilizer is a power device destined to be positioned between the mains and the User. The purpose is to ensure that the User is fed a voltage subject to a variation much lower (±0.5% with regards to the nominal value) that the one guaranteed by the distributing system.

The stabilization is performed on the «true rms» voltage and it is not affected by harmonics in the mains. Due to the fact that the regulation does not involve any intervention on the sinewave, neither an appreciable harmonic distortion nor a phase displacement is introduced on the downstream line.

The stabilizer is not affected by the load power factor (cos φ) and can operate with a load percentage varying between 0% and 100% on each phase. Regulation speed depends on the input voltage variation percentage and on the type of construction.

Indicatively, said speed ranges between 8 and 30millisec/V. Basically, a voltage stabilizer is made of a buck/boost transformer, a voltage regulator and an electronic control. Based on a microprocessor that samples at high frequency the output voltage, the control system drives the regulator gearmotor. By doing so, the regulator rollers change their position and therefore the voltage drawn and supplied to the buck/boost transformer primary winding. Being the secondary voltage of the buck/boost transformer in phase or in opposition to the supply, the voltage drawn from the regulator is added or subtracted to the mains voltage, thus compensating its variations. The voltage regulator is nothing but an autotransformer with continuously variable transformer ratio.

Depending on the stabilizer power, the regulator can be either toroidal or columnar.

The stabilizers are designed and built in compliance with the European Directives concerning CE marking (Low Voltage and Electromagnetic Compatibility Directives).

Standard units are housed in an IP21 metallic enclosure RAL7035 painted. Cooling is guaranteed by natural air circulation aided by extracting fans over a certain temperature.

The voltage stabilizer operating nominal voltage can be chosen from values (generally included in the range 380V / 415V). Such setting can be performed at the factory or at the Customer’s premises according to the instructions given in the reference technical handbook.

On Sirius and Sirius Advance stabilizers, the output voltage reference and the main configuration parameters can be set in different ways:

– through the local touch panel;

– directly by communicating with the microprocessor via a PC connection (through USB interfaces);

– from a remote station via Ethernet with MODBUS TCP/IP protocol.

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DVS ELECTRO-MECHANICAL VOLTAGE STABILIZERS

Vega

Ortea
Manufactured by: Ortea
Model: Vega
Product ID: 1022
single-phase
0,3 - 25kVA

Standard features
Selectable output voltage (dip-switch)* 220-230-240V
Output voltage accuracy ±0,5%
Frequency 50Hz ±5% or 60Hz ±5%
Admitted load variation Up to 100%
Cooling Natural ventilation
Ambient temperature -25/+45°C
Storage temperature -25/+60°C
Max relative humidity 95% (non condensing)
Admitted overload 200% 2 min.
Harmonic distortion None introduced
Colour RAL 7035
Protection degree IP 21
Instrumentation Output digital voltmetre
Installation Indoor
* 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.
Accessories
  • Interrupting devices
  • Load protection against over/undervoltage
  • Manual by-pass line
  • Input isolating transformer
  • SPD surge arrestor
  • EMI/RFI filters
  • IP54 protection degree for indoor and outdoor installation
Vega stabilizers are available for different ranges of input voltage fluctuation. Standard models offer a double input connection so that with the same unit two different input variations (±15/±20% or ±25/±30%) can be dealt with. An automatic circuit breaker is mounted on the regulation circuit to protect against overload and short circuit on the voltage regulator, whilst the auxiliary circuit is protected by fuses. A digital display on the front panel shows the output voltage and the alarms (min/max output voltage, gearmotor lock, internal overheating, regulator overload). The control logic is based on a digital microprocessor. All Vega stabilizers are fitted with the same control card, thus simplifying maintenance operations and spare parts storage.
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DVS ELECTRO-MECHANICAL VOLTAGE STABILIZERS

Antares

Ortea
Manufactured by: Ortea
Model: Antares
Product ID: 1025
single-phase
15 - 135kVA

Standard features
Selectable output voltage (dip-switch)* 220-230-240V
Output voltage accuracy ±0,5%
Frequency 50Hz ±5% or 60Hz ±5%
Admitted load variation Up to 100%
Cooling Natural ventilation (aided with fans)
Ambient temperature -25/+45°C
Storage temperature -25/+60°C
Max relative humidity 95% (non condensing)
Admitted overload 200% 2 min.
Harmonic distortion None introduced
Colour RAL 7035
Protection degree IP 21
Instrumentation Output digital voltmetre
Installation Indoor
Overvoltage protection Class II output surge arrestor
* 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.
Accessories
  • Interrupting devices
  • Load protection against over/undervoltage
  • Manual by-pass line
  • Input isolating transformer
  • SPD surge arrestor
  • EMI/RFI filters
  • IP54 protection degree for indoor and outdoor installation


Antares stabilizers are available for different ranges of input voltage fluctuation.

Standard models offer a double input connection so that with the same unit two different input variations (±1 5%/±20% or ±25%/±30%) can be dealt with.

An automatic circuit breaker is provided on the regulation circuit to protect against overload and short circuit on the voltage regulator whilst the auxiliary circuit is protected by fuses.

The instrumentation consists of a digital multimetre installed on the cabinet front panel. The alarms (min/max output voltage, gearmotor lock, internal overheating, regulator overload) are recognizable by means of LEDs on the control card.

The control logic is based on a digital microprocessor.

All Antares stabilizers are fitted with the same control card, thus simplifying maintenance operations and spare parts storage.

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DVS ELECTRO-MECHANICAL VOLTAGE STABILIZERS

Orion

Ortea
Manufactured by: Ortea
Model: Orion
Product ID: 1030
three-phase
2 - 135kVA

Standard features
Voltage stabilisation Independent phase control
Selectable output voltage (dip-switch)* 220-230-240V (L-N) / 380-400-415V (L-L)
Output voltage accuracy ±0,5%
Frequency 50Hz ±5% or 60Hz ±5%
Admitted load variation Up to 100%
Admitted load imbalance 100%
Cooling Natural air ventilation up to 45kVA ±15% Aided with fans from 60kVA ±15%
Ambient temperature -25/+45°C
Storage temperature -25/+60°C
Max relative humidity 95% (non condensing)
Admitted overload 200% 2 min.
Harmonic distortion None introduced
Colour RAL 7035
Protection degree IP 21
Instrumentation Output digital multimetre
Installation Indoor
Overvoltage protection Output Class II surge arrestor (over 60kVA ±15%)
* 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.
Accessories
  • Interrupting devices
  • Load protection against over/undervoltage
  • Manual by-pass line
  • Input isolating transformer
  • SPD surge arrestor
  • EMI/RFI filters
  • Neutral point reactor
  • IP54 protection degree for indoor and outdoor installation
Orion stabilizers are available for different ranges of input voltage fluctuation. Standard models offer a double input connection so that with the same unit two different input variations (±1 5%/±20% or ±25%/±30%) can be dealt with. The output voltage regulation is performed independently on each phase (stabilization of each phase- to-neutral voltage). Orion stabilizers are used with three-phase loads and single-phase loads with 100% current imbalance across the phases and asymmetrical mains voltage. For the correct operation, Orion voltage stabilizers require the neutral wire presence. Operation without neutral wire connection is achievable by adding a device able to generate it (D/Yn isolating transformer or neutral point reactor). An automatic circuit breaker is mounted on the regulation circuit to protect against overload and short circuit on the voltage regulator, whilst the auxiliary circuit is protected by fuses. The instrumentation consists of a multi-task digital line analyser. Such instrument is able to provide with information regarding the voltage stabilizer output parametres, such as phase and linked voltage, current, power factor, active power, apparent power, reactive power, etc.. The alarms (min/max output voltage, gearmotor lock, internal overheating, regulator overload) are recognizable by means of LEDs on the control card. Voltage control and stabilisation, performed on the true RMS value, are managed by the digital microprocessor. Each phase of every stabilizer belonging to this range is controlled by the same control board used on Vega and Antares models, thus simplifying maintenance operations and spare parts storage. Up to 45kVA, the stabilizers are equipped with wheels for easy handling.
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DVS ELECTRO-MECHANICAL VOLTAGE STABILIZERS

Orion plus

Ortea
Manufactured by: Ortea
Model: Orion plus
Product ID: 1033
three-phase
30 - 2000kVA

Standard features
Voltage stabilisation Independent phase control
PC selectable output voltage* from 210 to 255V (L-N) from 360 to 440V (L-L)
Output voltage accuracy ±0,5%
Frequency 50Hz ±5% or 60Hz ±5%
Admitted load variation Up to 100%
Admitted load imbalance 100%
Cooling Natural air ventilation. From 35°C aided with fans
Ambient temperature -25/+45°C
Storage temperature -25/+60°C
Max relative humidity 95% (non condensing)
Admitted overload 200% 2 min.
Harmonic distortion None introduced
Colour RAL 7035
Protection degree IP 21
Instrumentation Input & output digital multimetre
Installation Indoor
Overvoltage protection Class II output surge arrestor
Optimal voltage return through supercapacitors
in case of blackout
* 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.
Accessories
  • Interrupting devices
  • Load protection against over/undervoltage
  • Manual by-pass line
  • Total protection kit
  • Input isolating transformer
  • Integrated automatic power factor correction system
  • SPD surge arrestor
  • EMI/RFI filters
  • Neutral point reactor
  • IP54 protection degree for indoor and outdoor installation


Orion Plus stabilizers are available for different ranges of input voltage fluctuation. In the ±15%/ ±20% and ±25%/ ±30% types, the change of input range is obtained through different internal connections.

The Orion Plus voltage stabilizers regulate the output voltage independently on each phase.

Similarly to the Orion stabilizers, they can supply any single-phase, bi-phase and three-phase load even in case of and up to 100% unbalanced load current and asymmetrical mains distribution.

In this configuration, the presence of the neutral wire is required. The stabilizer can also operate without neutral wire by adding a device able to generate it (D/zn or D /yn isolating transformer or neutral point reactor).

The stabilizers are cooled via natural air ventilation, assisted by extracting fans when the cabinet internal temperature exceeds 35°C).

The instrumentation consists of two multi-task digital line analysers which are able to provide with information regarding the status of the lines upstream and downstream the voltage stabilizer (phase and linked voltages, current, power factor, active power, apparent power, reactive power, etc.)

The operating status of the stabilizer can be monitored by means of the LEDs on the front panel displaying all the information regarding each phase operating mode ('power on'; reaching of voltage regulation limits; increase/decrease of voltage regulation) and the possible alarms (minimum and maximum voltage, maximum current: overtemperature; ventilation failure). The alarm indicators are accompanied by an acoustic alarm.

  • Up to 250kVA ±15%, the regulation circuit is protected against overload and short circuit on the voltage regulator by an automatic circuit breaker.
  • – From 300kVA ±15%, 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 stabilizer 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 stabilizer switches automatically back to regular functioning.

The auxiliary circuits are protected by fuses.

The control logic, performed on the true RMS value, is based on DSP microprocessors.

The unit parameters and the output voltage reference can be set by using a personal computer, thus allowing for dealing directly in the field with any problems related to voltage stability.

All Orion Plus stabilizers are provided with Class II SPD surge arrestors.

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DVS ELECTRO-MECHANICAL VOLTAGE STABILIZERS

Sirius

Ortea
Manufactured by: Ortea
Model: Sirius
Product ID: 1037
three-phase
60 - 6000kVA

Standard features
Voltage stabilisation Independent phase control
Output voltage selectable via display, PC and/or Ethernet* from 210 to 255V (L-N) from 360 to 440V (L-L)
Output voltage accuracy ±0,5%
Frequency 50Hz ±5% or 60Hz ±5%
Admitted load variation Up to 100%
Admitted load imbalance 100%
Cooling Natural air ventilation. Above 35°C aided with fans
Ambient temperature -25/+45°C
Storage temperature -25/+60°C
Max relative humidity 95% (non condensing)
Admitted overload 200% 2 min.
Harmonic distortion None introduced
Colour RAL 7035
Protection degree IP 21
User interface 10" touch panel (multilingual) remotely available via VNC
Installation Indoor
Regulator overload protection Digital control
Communication system Ethernet / USB / MODBUS TCP/IP
Overvoltage protection Class I input surge arrestor Class II output surge arrestor Optimal voltage return through supercapacitors in case of blackout
* 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.
Accessories
  • Interrupting devices
  • Load protection against over/undervoltage
  • Manual by-pass line
  • Total protection kit
  • Input isolating transformer
  • Integrated automatic power factor correction system
  • EMI/RFI filters
  • Neutral point reactor
  • IP54 protection degree for indoor and outdoor installation
Sirius stabilizers are available for different ranges of input voltage fluctuation. In the ±15%/ ±20% and ±25%/ ±30% types, the change of input range is obtained through different internal connections (only up to 2000kVA ±15% and equivalent). Sirius stabilizers are equipped with columnar voltage regulators which enable the achievement of high ratings (up to 6000kVA) and a solid and reliable construction, thus meeting the most diverse industrial applications. The Sirius voltage stabilizers regulate the output voltage independently on each phase. Similarly to the other models, they can supply any single-phase, bi-phase and three-phase load even in case of and up to 100% unbalanced load current and asymmetrical mains distribution. In any case, the presence of the neutral wire is required. The stabilizer can also operate without neutral wire by adding a device able to generate it (D/zn or D /yn isolating transformer or neutral point reactor). The stabilizers are cooled via natural air ventilation, assisted by extracting fans when the cabinet internal temperature exceeds 35°C. The user interface consists of a multilingual 10" touch panel (fitted with RS485 port) able to provide with information regarding the status of the lines upstream and downstream the voltage stabilizer (phase and linked voltages, current, power factor, active power, apparent power, reactive power, etc.), the operating status of the stabilizer displaying all the information regarding each phase operating mode ('power on'; reaching of voltage regulation limits; increase/decrease of voltage regulation, etc.) and the possible alarms (minimum and maximum voltage, maximum current, overtemperature, etc.). The alarm indicators are accompanied by an acoustic alarm. The display is remotable using VNC software. It is also possible to communicate with the stabilizer with the Modbus TCP/IP protocol (standard communication protocol between electronic industrial equipment) via an Ethernet connection with RJ45 cable. The control system is also provided with two USB ports for downloading stored data and uploading new releases of the control card software. The Sirius stabilizer 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 stabilizer 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 stabilizer switches automatically back to regular functioning. The control logic is managed by two DSP microprocessors (one performing the control and the other one managing the measurements) which obtain the output voltage stabilisation by adjusting its true RMS value. The whole system is supervised by a third 'bodyguard' microprocessor that controls the correct functioning of the other microprocessors. The unit parameters and reference output voltage value can be set via a PC connection, allowing for promptly dealing in the field with any issues concerning voltage stability. 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 stabilizers are provided with Class I and Class II SPD surge arrestors.
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DVS ELECTRO-MECHANICAL VOLTAGE STABILIZERS

Sirius advance

Ortea
Manufactured by: Ortea
Model: Sirius advance
Product ID: 1042
three-phase
60 - 4000kVA

Standard features
Voltage stabilisation Independent phase control
Output voltage selectable via display, PC and/or Ethernet* from 210 to 255V (L-N) from 360 to 440V (L-L)
Output voltage accuracy ±0,5%
Frequency 50Hz ±5% or 60Hz ±5%
Admitted load variation Up to 100%
Admitted load imbalance 100%
Cooling Natural air ventilation. Above 35°C aided with fans
Ambient temperature -25/+45°C
Storage temperature -25/+60°C
Max relative humidity 95% (non condensing)
Admitted overload 200% 2 min.
Harmonic distortion None introduced
Colour RAL 7035
Protection degree IP 21
User interface 10" touch panel (multilingual)
remotely available via VNC
Reactive power regulator
Installation Indoor
Regulator overload protection Digital control
Communication system Ethernet / USB / MODBUS TCP/IP
Overvoltage protection Class I input surge arrestor
Class II output surge arrestor
Optimal voltage return through supercapacitors
in case of blackout
Total protection and by-pass kit Input automatic circuit breaker
By-pass switch made of an interlocked
automatic circuit breaker
Output interlocked motorized automatic circuit
breaker with protection against overload,
overvoltage, undervoltage, phase sequence
error and phase failure
Integrated automatic power factor correction system Based on high energy density metallised poly-propylene three-phase capacitors (Un = 525V)
Three-phase blocking reactor (tuning frequency – 180Hz)
* 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.
Accessories
  • Input isolating transformer
  • EMI/RFI filters
  • Neutral point reactor


Sirius Advance voltage stabilizers derive from the SIRIUS type, of which they maintain the main technical characteristics.

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 shortcircuits in bypass condition.

The output motorized automatic circuit breaker (QF3), interlocked with the bypass switch, protects against overload, short-circuit, 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 stabilizer. The PFC system exploits high energy density metallised polypropylene three-phase capacitors (Un=525V) exclusively thus guaranteeing robustness 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.

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