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 static stabilizer is used when the correction speed represents the critical issue (for example, computers, laboratory equipment, measuring benches and medical instrumentation).
The stabilisation is performed on the «true rms» voltage. 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.
Basically, a static voltage stabilizer is made of a buck/boost transformer, a conversion units and an electronic control (with IGBT static switches).
The operating principle is similar to the one described for the electro-mechanical stabilizers. The difference lies in the fact that the voltage compensation on the buck/boost primary winding is performed by an electronic board through IGBT static switches instead of the autotransformer with variable transformer ratio.
The control circuit compares the output voltage value to the adjusted one. When the percentage variation is too high, the control drives the double conversion regulators. By doing so setting and supplied the voltage 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 with response time in milliseconds.
The voltage stabilizer can operate with input and output voltage different (single-phase 220V/240V – three-phase 380V/415V) from the rated voltage (single-phase 230V – three-phase 400V). Such setting can be performed at the factory or at the Customer’s premises according to the instructions given in the handbook.
The stabilizers are designed and built in compliance with the European Directives concerning CE marking (Low Voltage and Electromagnetic Compatibility Directives).
DVS-IVC STATIC VOLTAGE STABILIZERS
Gemini
4 - 40kVA
Standard features
| Gemini | Gemini Plus | |
| Voltage regulation | IGBT control | |
| Selectable output voltage* | 220-230-240V | |
| Output voltage accuracy | ±1% | |
| Frequency | 50-60Hz ±5% | |
| Admitted load variation | Up to 100% | |
| Cooling | Forced ventilation | |
| Ambient temperature | -25/+45°C | |
| Storage temperature | -25/+60°C | |
| Max relative humidity | 95% | |
| Admitted overload | 150% 2 sec. | |
| Harmonic distortion | None introduced | |
| Colour | RAL 9005 | |
| Protection degree | IP21 | |
| Instrumentation | Output digital voltmetre | |
| Installation | Indoor | |
| Overvoltage protection | Output class II surge arrestor | |
| Protection | EMI/RFI filters Automatic by-pass protection |
EMI/RFI filters Input automatic circuit breaker Automatic by-pass protection Manual maintenance by-pass |
Such choice sets the new nominal value as a reference for all the stabilizer parameters.
Accessories
- Interrupting devices
- Load protection against over/undervoltage
- Input isolating transformer
- IP54 protection degree for indoor and outdoor installation
DVS-IVC STATIC VOLTAGE STABILIZERS
Aquarius
10 - 120kVA
Standard features
| Aquarius | Aquarius Plus | |
| Voltage regulation | IGBT control | |
| Voltage stabilisation | Independent phase control | |
| Selectable output voltage* | 220-230-240V (L-N) / 380-400-415V (L-L) | |
| Output voltage accuracy | ±1% | |
| Frequency | 50-60Hz ±5% | |
| Admitted load variation | Up to 100% | |
| Cooling | Forced ventilation | |
| Ambient temperature | -25/+45°C | |
| Storage temperature | -25/+60°C | |
| Max relative humidity | 95% | |
| Admitted overload | 150% 2 sec. | |
| Harmonic distortion | None introduced | |
| Colour | RAL 9005 | |
| Protection degree | IP21 | |
| Instrumentation | Output digital multimetre | |
| Installation | Indoor | |
| Overvoltage protection | Output class II surge arrestor | |
| Protection | EMI/RFI filters Automatic by-pass protection |
EMI/RFI filters Input automatic circuit breaker Automatic by-pass protection Manual maintenance by-pass |
Such choice sets the new nominal value as a reference for all the stabilizer parameters.
Accessories
- Interrupting devices
- Load protection against over/undervoltage
- Input isolating transformer
- Integrated automatic power factor correction system
- Neutral point reactor
- IP54 protection degree for indoor and outdoor installation
DVS-IVC STATIC VOLTAGE STABILIZERS
Odyssey
80 - 4000kVA
Standard features
| Voltage regulation | IGBT control (double conversion technology) |
| Voltage stabilisation | Independent phase control |
| Available nominal voltage* | 220-230-240V (L-N) 380-400-415V (440-460-480V**) (L-L) |
| Output voltage accuracy | ±0,5% |
| Frequency | 50Hz ±5% or 60Hz ±5% |
| Correction time | <3 millisecs |
| Admitted load variation | Up to 100% |
| Admitted load imbalance | 100% |
| Cooling | Forced ventilation |
| Ambient temperature | -20/+40°C |
| Storage temperature | -25/+60°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" Touch panel, multilingual (Ethernet communication) Remotely available by dedicated «client» |
| Installation | Indoor |
| Communication system | MODBUS RTU (RS485) |
| Overvoltage protection | Input class I surge arrestors Output class II surge arrestors |
| Protection | Automatic by-pass protection |
Such choice sets the new nominal value as a reference for all the stabilizer parameters. ** 60Hz only.
Accessories
- Interrupting devices
- Short circuit output protection
- Manual by-pass line
- Total protection kit
- Input isolating transformer
- Integrated automatic power factor correction system
- EMI/RFI filters
- IP54 protection degree for indoor and outdoor installation
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.
Odyssey 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.
This voltage stabilizer can operate with different input and, consequently, output voltage (380V or 415V) from the nominal one (400V). Such setting can be performed at the factory or at the Customer’s premises according to the instructions given in the handbook. It is also possible to select an output voltage different from the nominal one, but it is necessary to take into account the reduction of the power and the adjustment interval of the machine.
The user interface is created using a multilingual «touch panel» (10") with an Ethernet communication port which, via dedicated «client», allows remote control. 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 an IP21 metal enclosure with RAL9005 finish for indoor installation. Cooling is guaranteed by extracting fans.
