Induction Voltage Regulators, NT Series
Induction voltage regulators, also known as rotary transformers, are electric machines designed for continuous voltage regulation. They are manufactured in three varieties:
NTA series single three-phase induction voltage autotransformers with a wide or narrow continuous voltage regulation range. They are used as power sources in test rooms, to maintain voltage levels where there is a risk of fluctuations, for temperature control in resistor furnaces and for other applications. With an angular shifting of the input winding to the output winding, the output voltage phase is angular shifted.
The maximum output is 635 kVA.
NTB series double three-phase induction voltage transformer with a delta or star connection output winding option and the possibility for use as an autotransformer. These machines are used in cases where the angular vector displacement of the output voltage needs to correspond to the vector of the input winding, e.g. where the transformer is connected with another voltage source in parallel. As an autotransformer they are used to maintain voltage at a constant level of output where there may be voltage fluctuations.
The maximum output is 1439 kVA or, as an autotransformer, 3282 kVA.
NTP series Pensabene connection single three-phase induction voltage autotransformers with three-phase or single-phase load feeding. These are continuous controllable voltage sources from zero to 130 % of the input voltage. The output voltage has a constant phase which is shifted by 180° to the input voltage phase. These machines may be used for three-phase or single-phase current draw.
The maximum output is 1000 kVA.
