ttf-flieger GmbH Voltage Stabilizers

Automatic Voltage Stabilizers

Power range single phase up to 135 kVA,
Power range three phase up to 6000 kVA
Speed up to 125 Volt / sek.

Electronic Voltage Stabilizers

Power range single phase up to 10 kVA,
Power range single phase up to 30 kVA
Speed 500 Volt / sek.

Voltage stabilizers: operation

Our voltage stabilizers are designed to operate with rated voltage in accordance with the European law IEC38 and are expected to be connected between main power supply and load.

The purpose is to supply the loads a stabilised voltage having an input voltage variable in relation to the rated value. The highest input current is obtained with the minimum rated voltage; as the output voltage is stabilised within a close range, the output current is considered to be constant.

Stabilization takes place on the ‘rms’ value of the voltage and is not affected by harmonic distortion in the mains.

Load Variation

Our voltage stabilizers can operate with a load variation range from 0 to 100%; the response time depends on the input voltage percentage variation and on the type of design (indicatively, it can vary between 12,5V/sec and 1300V/sec).

The voltage stabilizers are not affected by the load power factor and since regulation is performed without chopping the voltage sine wave, neither an appreciable harmonic distortion nor a phase displacement are introduced on the downstream line.


The voltage stabilizers are housed in a metal enclosure with RAL 7035 finish and IP21 protection class, suitably sized according to power rating. Depending on the model, the stabilizers are cooled by air (natural or aided convection) or oil.