AUTOMATIC VOLTAGE CONTROLLER / SERVO CONTROLLED VOLTAGE STABILIZER
(Range : 700 kva for low voltage class)

Inspite of best efforts, no state electricity board can ensure constant voltage to the customer because of long and inadequate distribution lines and irregular load pattern on distribution transformers. Generally Voltage is low during day time and high during night hours. Moreover on holidays, peak hours, rainy days and when agricultural and Industrial load is switched off, the voltage rises sharply which is more dangerous.

This higher current affects the electrical motors ( particularly smaller capacity motors upto 7.5 H.P.) in three ways :
»   Higher current produces higher losses in electrical motors which causes premature failure of winding.
»   These higher losses of electric motors also increase the losses of cables, switches, transformers & other
     associated equipments.
»   For smooth continuous operation of motors, overload relays are usually set at 20% higher setting.

With the installation of the Servo Controlled Voltage Stabilizer and maintaining 390/400 volts, the motor will operate smoothly drawing 15-20% lesser current and correspondingly the relay setting can be reduced by 15-20%. In case single phasing occurs, the relay will trip in 40-50 seconds. The motor can withstand the high current for this period and will be safe. Also, the relays, contactors, switchgears, etc. incorporated with the motor, will be safe.


DESCRIPTION OF SERVO CONTROLLED AUTOMATIC VOLTAGE CONTROLLER :
Komal’s Servo stabilizer is manufactured as per IS : 9815 and primarily consists of the following :

1. LINEAR PLUS/MINUS TYPE VERTICAL ROLLING CONTACT VOLTAGE REGULATOR
In our regulator we are using heavy section of electrolytic grade rectangular copper strip instead of copper wire to minimize the losses & increase the efficiency of equipment. We are also using self lubricating Carbon Roller Assemblies instead of ordinary Carbon Brushes which offers more reliability and trouble free performance of the equipment.

2. DOUBLE WOUND BUCK/BOOST TYPE SERIES TRANSFORMERS
In our Buck / Boost transformer we are using CRGO lamination to minimize iron losses and coils of Buck / Boost transformer are wound with heavy section of multi strips electrolytic copper to minimize copper losses for getting better efficiency of the equipment.

3. ELCTRONIC CONTROL CIRCUIT AND METER PANEL
Komal’s Automatic Voltage Controller consists of very simple electronic control circuit for monitoring and controlling voltage, repair & maintenance of which is very easy.
The regulator and Buck/Boost transformer are oil cooled, housed in same or separate sheet steel tanks. Radiators are provided for effective cooling. The coils of voltage regulator & Buck / Boost Transformers are vacuum impregnated and oven dried as per IS.