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 solid and reliable construction, thus meeting the most diverse industrial applications.