Servo Controlled Automatic Voltage Controller

Servo
Controlled Automatic Voltage Controller
Voltage fluctuation is a common
phenomenon in every part of the country. 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. Automatic Voltage Controller
(Stabilizer) is an equipment obtain constant voltage from fluctuating
supply system. The industrial units running round the clock usually
face the problem of low and high voltage. 90% of industrial load is of
motors, electric motors in these ways:

Higher current higher losses in
Electric motors which cause premature failure of winding.These higher current of Electric
motor also increase the losses of cables, switches, transformrt and
other associated equipments.This higher current of Electric
motors require 15-20% lesser current and corresponding 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 period and will safe. Also the relays, contactors,
switchgears, etc. incorporated with the motor will be safe.
Description
of Globe's Servo Controlled Automatic Voltage Controller: Globe's Servo
Stabilizer primarily consists of following:

1. Linear, plus/minus type vertical
Rolling Contact Voltage Regulator
In our Regulator we are using heavy section of electrolytic rectangular
copper strip instead of copper wire to minimize the losses and 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 perfoemance of the equipment.

2. Double Wound Buck/Boost type Series
Transformer
In our Buck/Boost transformer we are using CRGO lamination to minimize
iron loses 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. Electronic Control Circuit and
meter panel
Globe'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 oven dried as per IS.