Servo Stabilizers are an ideal choice for use as mains voltage stabilizers. They provide continuous and precise voltage regulation without any interruption in supply. AULTEN Stabilizers are highly power-efficient, with no-load losses of less than 2%.

If your unit is experiencing low, high, or unbalanced voltage, it is important to install a stabilizer as soon as possible. Industrial units facing frequent failures of electrical equipment—such as bulbs, tubes, chokes, starter coils, contactor coils, motors, etc.—should check whether voltage fluctuations (especially high voltage) are the cause.

You can monitor this by recording the incoming voltage every hour for several days. If you observe that the input voltage drops below or rises above 230V (single-phase) or 400V (three-phase) even for a few hours a day, then a stabilizer is definitely required.

Servo Voltage Corrector Technical Specifications

 1 KVA to 30KVA (SinglePhase)

6KVA to 5000KVA

(ThreePhase)

Phase – Single Phase Three Phase / 

Servo types Unbalance Type & balance tape 

Voltage Input  renge  

Minimum Low L-N  90v  L-L 155V

 maximum High L-N 350V L-L 605V

Frequency Input 50Hz

Voltage Output L-N 230 V ± 1% L-L 400 V ± 1%  50HZ

Delay Output 0 – 10 sec

Over Volt Output AC L-N 250V ± 5V AC L-L 440V ± 5V

Low Volt Output AC L-N 200V ± 5V AC L-L 346V ± 5V

Micro processor Display 

Switch gear 

Change over – Contactor – MCB   – MCCB – ACB – SPD – Phase sequence device Relays

 Protection

1) input voltage High – Low trip

2) Over Load Trip

3) neutral fall prip protection

4) Phase sequence wrong trip

5) 3 phase one phase fall trip

6) Surge Protective Devices 

Cooling System Air (Cooled) / Oil Cooled

Full Load Efficiency Better Than 90%/95%

No Load Efficiency Less Than 2% of Rated Load

Temperature 5ºC – 50ºC

Humidity Upto 95%

Floor Mounting

Class Insulation B 

Duty Cycle   24 hr. Continuous Operation

Wave Form Distortion Nil  True to Input 

Response Time Less Than 10ms

Correction Speed Upto 70V per sec. (Dependent on Input Voltage & Capacity)

Correction Method Step-leess Correction using Auto Variable Transformer 

Suitability Suitable for all Power Factor Loads 

Break Down Strength & IR 300V AC for 2minutes, Greater than 50 Mega Ohms at 500V DC