


Inner View
|
Bharti' s
Automatic Voltage Stabilizer
Introduction: |
Fluctuations in
the voltage is a
constant feature
of Electricity
supply we get.
Constant
fluctuation of a
voltage leads to
frequent
breakdown and
higher rejection
in end product.
We know that 90%
of industrial
load is of
motor. It draws
high current at
high & low
voltage. This
higher current
produce higher
losses in
electrical
motors. These
losses in motor
increase the
losses in
Cables,
Switches,
Transformers and
other associated
equipments.
|
This higher
current effects
the electrical
motor
(particularly
smaller capacity
motor up to 7.5
H.P)in 3 ways |
|
|
|
Higher current
produce higher
loss in
electrical motor
which cause
premature
failure of
winding. |
 |
These higher
losses of
electric motor
also increase
the losses of
cable, switches,
transformer
&other
associated
equipment. |

|
For smooth
continuous
operation of
motor, over load
relay are
usually set at
20% higher
selling. |
With the
installation of
the stabilizer &
maintains
390/400 volt,
the motor will
operate smoothly
drawing 15-20%
lesser current &
correspondingly
the relay
setting can be
reduced by
15-20%.
|
Construction: |
The Buck/Boost
and Regulator
Transformer
winding are
built from paper
covered
electrolytic
copper strip or
enamelled copper
conductor (Dried
in oven). The
core is built of
high grade cold
rolled grain
oriented silicon
lamination (CRGO)
to minimise iron
losses. All
components of
equipment
mounted on a
framework of
M.S. housing are
fitted with
cooling pips to
provide natural
cooling.
We provide a
vertical Rolling
Contact types
voltage
regulator with
having sections
and paper
covered copper
strip and fitted
with carbon
roller assembly
which offer
higher
reliability than
ordinary carbon
brushes. It is
also built with
high quality
meter switches
and indicators.
It is designed
for 30-35 Degree
Centigrade above
ambient suitable
for any kind of
ambient
temperature
condition. Oil
which is used as
a coolant is of
IS: 335
standards being
used & it is
properly
filtered before
topping. |
|
|
Standard Fitting
& Accessories: |
-Rating
Plate
-Lifting Lug
-Drain valve
-Oil Level
-Oil Filling hole and plate
-Wheels
-Control MCB's [1.0 Amp for
motor load & 0.5 Amp for
voltmeter & indicators]
|
|
General
Specification: |
Bharti's Automatic Servo
Stabilizer are available in
wide range and various
models. The standard three
phase models are suitable
for balanced and unbalanced
supply and loads. The
standard model confirm the
following specifications are
as follow: |

Regulator with
Carbon
Roller Assembly
|
Input
Voltage |
: |
300-460V
320-460V 340-460V 360-460V. |
Efficiency |
: |
Better than
99%. |
Output
Voltage |
: |
400V, +/-
1%, Phase, 50HZ. |
Ambient |
: |
0-35°C max
relative humidity upto 90% |
Environment |
: |
Designed for
Indoor tropical use |
Wave from
distortion |
: |
Virtually
Nil. |
Duty Cycle |
: |
100%
Continous. |
Correction
Rate |
: |
8-10V/Sec.
(Upto-500KVA). |
Mounting |
: |
On Uni-directional
wheels. |
Cooling |
: |
Air
Cooled/Natural Oil Cooled. |
|
|
NOTE:
Different Non-Standard input
& output ranges are also
available against specific
requirement.
|
Comparison
between Bharti’ s make &
Conventional make Automatic
Voltage Regulator:
|
Bharti make
roller type
Regulator |
Conventional
make with carbon
brush Regulator |
 |
Suitable
for
100%
continuous
duty
cycle |
 |
Power
consumption
is
0.5
to
1.5%
depending
upon
the
model
&
input
voltage
variation. |
 |
Life
at
full
load
is
15-20
years |
 |
Negligible
losses
at
full
Buck/Boost
conditions. |
 |
5
years
unconditional
guarantee
in
india. |
 |
As
losses
are
less,
heat
generated
is
less.
The
size
of
stabilizer
is
very
compact.
Quantity
of
oil
is
less. |
|
 |
Suitable
only
for
partial
load
50-60% |
 |
Power
consumption
is
2-7% |
 |
Max.
life
is
3-5
years
at
full
load |
 |
Max-losses
in
full
Buck/Boost
condition |
 |
Normal
guarantee/warrantee
for
one
year |
 |
Heat
generated
is
more.
Size
is
bulky.
Quantity
of
oil
is
more. |
|
|
More Uses: |
1.
In residential area, we
usually face unbalanced
input voltage, in that case
Automatic Voltage Controller
is used to Overcomethis
problem. This unbalanced
voltage usually causes the
failure or damage of motors,
machines, electronic items
used in houses, tubes,
bulbs, fans etc. If you
find input voltage is above
230 Volt single
phase/400Volt three phase
even for few hours a days,
then you definitely require
a stabilizer.
|
2.
Industries which have
installed OLTC with
transformer also require
Stabilizer because with help
of Stabilizer, we don't have
to change the tapping of
OLTC frequently. However
range of Stabilizer can be
kept low where OLTC is
installed
. |
Table: |
INPUT |
Motor Load Below 10HP |
Lighting Load |
% Reduction in Breakdown |
Power Saving |
%Reduction in Breakdown |
Power Savng |
380/400 |
NIL |
NIL |
NIL |
NIL |
380/420 |
5% |
3% |
10% |
5% |
380/440 |
10% |
5% |
20% |
10% |
380/460 |
40% |
7% |
40% |
20% |
|

Servo Control
Card |
Loss
Comparison
of
Bharti
Make
Regulator
&
Conventional
make
regulator:
|
Capacity |
Bharti |
Conventional |
60A |
570W |
1055W |
75A |
730W |
2050W |
100A |
905W |
3100W |
|
|
Advantage:
1. Save
Energy.
2. Less
production
losses and
better
efficiency in
plant.
3.
Induction motor
operate at high
efficiency.
4.
Improvement in
power factor &
reduction in
MDI.
5. 80%
depreciation as
per Income tax
in India Only.
6.
Reduction in
breakdown of
electrical
equipment. |
|
Application:
We can use
stabilizer for various kind
of application such as: |
1.
Engineering Units
2. Rice Shellers
3. Cold Storages
4. Textile Mills
5. Paper Milles
|
6. Rolling
Mills
7. Footwear and Leather Units
8. Distilleries & Beverages
9. Rubber/Plastic Industries
10.Tea Estates |
11. Pharmaceutical units
12. Cement Mills
13. Flour Mills
14. Hospitals
15. Hotels/Clubs |
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