L.t. Automatic Voltage Stabilizer

We are offering L.t. Automatic Voltage Stabilizer.
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 and other associated equipments.
For smooth continuous operation of motors, over load relays are usually set at 20% higher setting.
With the installation of the stabilizer and maintaining 390400 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 motors 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.
L.T. AVR being easy to handle are installed in all the running units, units having L.T. Connections, units having small H.T. Connections. These can be manufactured for Balance Input Voltage and Unbalanced load or Unbalanced Voltage and unbalanced load.
The units are designed for Standard Input Voltage Ranges as under
Input Voltage
360-450V
350-460V
340-460V
320-460V
300-460V
Efficiency (as calculated)
99.60%
99.50%
99.35%
99.00%
98.70%
Output Voltage
400V_+ 1% 3 Phase, 50hz
Temperature Rise (Max.)
Naturally Oil Cooled
Mounting
On Uni-directional Wheel
Wave form distortion
Nil
Duty Cycle
100% Continuous
Technical Advantages
Low Replacement Cost
Undistorted output characteristics ie. No wave from distortion
Moving parts on L.T. Side and it’s mass is extremely low, only few Ib-inch torque
Energy savings
High efficiency (about 99%) and minimum no-load losses ± Simplicity and Flexibility of design
On load stepless Voltage variation
Long service life
Regulating coils are wound with rectangular conductors on their edge, thus giving high mechanical strength compared to other designs
Applications of Voltage Regulators
Pharmaceutical Units Cold Storages Rolling Mills Textile Mills Paper Mills Tube Mills Rice Shellers Rubber Industries Food Processing Units Oil & Vanaspati Plants Footwear & Leather Units Tea Gardens Distilleries & Beverages Hospitals & Nursing Home Clubs Hotels High Rise Buildings Furnace Transformers Test Rooms Glass Industries Research Stations Chemical Industries
The table below compares the behaviour of 5 H.P. Motor at different voltage :-
INPUTVOLTAGE
CURRENT
KVA
PF
400
7.5 A
5.2
0.8
425
11% More
18% More
0.7
435
19% More
28% More
0.61
445
265 more
38% More
0.57
The table below compares the behaviour of 60 watt lamp at different voltage :-
VOLTAGE
CURRENT
WATTS
LUMINOUSINTENSITY
LIFE IN HOURS
230
0.26
60 W
710
1000
240
0.27
65 W-8.3% More
820
575
250
0.28
70.6-17.6% More
943
338
260
0.29
75.4-25.6% More
1073
200
270
0.31
83.4-39% More
1213
100