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Automatic voltage controller, Automatic voltage controller manufacturer, stabilizer marketing, Automatic voltage controller in india
 
  » Automatic Voltage Controller
 

 

Automatic voltage controller is an industrial robot, which continuously monitor the voltage variation round the clock & whenever there is any voltage fluctuation, it rectifies to the desired level in few seconds.

The basic purpose of AVC is to maintain the desired voltage and to reduce the breakdown of electrical equipments due to low/high voltage. Power saving, Reduction in MDI and improvement of P.F will be added advantage.

In india all electrical equipments are designed for 230/400 volts single/three phase Voltage variation is common phenomenon The input voltage is generally low during day time a year/few days in a month /few hours in a day- the voltage is either low or high due to the following reasons.

  • Holidays
  • Peak hours
  • Rain days
  • Agriculture load
  • Weather conditions etc.

Therefore for smooth function, it is suggested to install AVC with 400 Volt +15% or 400 Volts +20% input voltage variation range i.e. 340-460 Volts or 320-480 Volts models.

Automatic voltage controller
Check

1. You check the failure rate of Electrical Equipments such as Bulbs, Tubes, Chokes, motors, Cotactor coils and Electronic uipments etc.

2. You check the voltage variation by installing the digital voltmeter at your security gate and note down the hourly reading of input oltage variation range for few days.

3. Note down hourly reading of current and voltage of one motor operating at constant load for 2-3 days. From the different readings you will observe that the current drawn by the motor is minimum at 390/400 volts as compared to the current drawn at other voltage, This means that power consumed by the motor is minimum at 390/400 volts.

4. Also note down hourly reading of voltage and K.W from your Electronic Energy Meter for 2-3 days. From the readings you will bserve that K.W is minimum at 390/400 volts in most of the reading as compared to the higher voltage.

if you find that the above collected details are true then you will certainly have the advantages after installing the Servo voltage stabilizer as mentioned below

The table below gives approximate quantitative advantages of automatic voltage Controller at various voltage fluctuation levels.

Input Voltage Approx. Reduction in Break down Electrical Equipments Approx Power saving
Voltage variation Bands Motor Load below 10 hp Lighiting Load Motor Load below 10 hp Lighiting Load
380-400 Volts Nill Nill Nill Nill & no servo stabilizer required
400-420 Volts 5% 10% 3% 5%
420-440 Volts 10% 20% 6% 10%
440-460 Volts 40% 40% 7% 20%
460-480 Volts 80% 60% 10% 30%

Carbon Roller Assembly Close view of carbon Roller Basic Circuit
 
AT LOW VOLTAGE


   SPECIFICATION

1. At low voltage you will not be able to operate your machines at rated capacity resulting in lower production.

2. You need to run the machines on DG set. The power cost of D.G set is times as compared to charged by electricity board

BENEFITS OF INSTALLING AUTOMATIC VOLTAGE CONTROLLER ON LIGHTING LOAD

By maintaining 380/210 volts-three / single phase output through Automatic Voltage Controller for Lighting Load, there will be definite saving in power bill & reduction in failure rate of lighting equipments, Higher the input voltage- more will be the saving The overall effect on the brightness of the lamp at 210 volts will be negligible.


ADVANTAGES
  • Reduction in Breakdown of Electrical Equipments
  • Reduction in MDI
  • Energy Saving
  • Improvement in Power Factor
  • Uniform Quality of End Product
  • 80% Depreciation as per Income Tax Act

PAYBACK PERIOD
Owing to its high efficiency and associated benefits, the payback period for the cost of Powertek Servo Voltage Stabilizer is from 6-12 months depending upon the input voltage variation and number of working hours of the plant. The HIGHER the input voltage the SHORTER will be the payback period.


DESCRIPTION OF POWERTEK MAKE AUTOMTIC VOLTAGE CONTROLLER
Powertek Servo Stablizer primarily consist of the following :

1.Linear Type Plus / Minus Vertical Rolling Contact Type Regulator

2. Double Wound Buck / Boost Transformer

3. Electronic Control Circuit and meter panle

The regulator and Buck / Bost transformer are oil cooled, housed in same or separate steel tanks. The radiators, if neccssary are provided for effective cooling. Their core is built from grain oriented silicon steel laminations which keep losses to the minimum and they are wound with electroylytic grade copper to minimise the losses, vacuum impregnated and oven dried as per IS standard.



Powertek's servo stabilizer are available in a wide range and various models. The standard Three phase models are suitable for balanced & unbalanced supply and loads. The standard models confirm to the specification:
 
Input Voltage 350 to 450,350 to 460, 340 to 480, 320 to 460, 300 to 460
Efficiency (approx.) 99.5%   99%   98.7%   98.5%   98.28%   98%
Output Voltage 400 V+/-1%, 3-Phase, 50 Hz
Cooling Natural Oil Cooled
Type Indoor / Outdoor
Temp. Rise (max.) 30 deg. C above ambient temperature
Mounting On Uni-directional Wheels
Correction Rate 6-8 V / Sec. (Upto 500 KVA) and 3-4 V/Sec. (Above 500 KVA)
Wave form distortion Virtually Nill
Duty Cyde 100% Continuous
NOTE : Non-standard input and output models are available against specific requirments.

ADVERSE EFFECTS OF SINGLE PHASING

a. The line current increases by 1.5 times.

b. If the realy setting is at 15-20% higher than actual operating current then the relay will take 4-6 minutes to trip.

c. The motor (particularly smaller capacity moors upto 7.5 H.P.)

d. Heavy short circuit current flows through the relays, contactors, cables etc.

f. This further damages the switchgear and in some of the cases may cause fire also.

 
 
COMPARISON BETWEEN POWERTEK MAKE AND CONVENTIONAL MAKE VOLTAGE CONTROLLER
"Powertek" Make Roller Type Regulator "

Conventional Make With Carbon Brush Regulator
  • Power consumption is 0.5 to 1.5% depending upon the input voltage range
  • Suitable for continuous 100% duty cycle
  • Life at full load is 15-20 years
  • Five years unconditional guarantee
  • Negligible losses in full boost & buck condition
  • Power consumption is 2 to 7% under similar condition
  • Suitable for only 30% to 40% duty cycle
  • Maximum life is 2-3 years at full load
  • Normally guarantee for one year
  • Max. Losses in full boost and buck condition.
ATTENTION FOR POWER CONSUMER UNITS HAVING L.T. CONNECTIONS BUT NOT HAVING THEIR OWN DISTRIBUTION TRANSFORMER AND SITUATED IN COMMERCIAL / RESIDENTIAL AREAS :
It has been observed that the said power consumer usually face unbalanced input voltage problem and to overcome the same should install Automatic Voltage Controller suitable for unabalanced input voltage (individual phase control).

ATTENTION FOR INDUSTRIAL UNITS HAVING OLTC
The units which have already installed OLTC with their transformer, also require stabillizer due to the reason that the tapping of OLTC is not changed frequently. It is changed only when the problem of very high or very low voltage is felt.On the other hand, the stabilizer continuously monitors the output voltage level. However the Input voltage range of stabilizer can be kept low where OLTC is installed.
APPLICATION
Though stabilizers are useful for any kind of application, these are most suitable for 24 hour continuous process plants where breakdowns due to voltage fluctuation results in heavy financial losses. These include :
  • Cement Plants
  • Flour Mills
  • Engineering Units
  • Pharmaceutical Units
  • Paper Mills
  • Tube Mills
  • Hotels
  • High Rise Buildings
  • Nursing Home
  • Hospital
  • Cold Storages
  • Rolling Mills
  • Textile Mills
  • Clubs
  • Rubber Industries
  • Footwear and Leather Units
  • Rice Shellers
  • Distilleries & beverages
  • Tea Estates
  • Oil and Vanaspati Plants
  • Food Processing Units

 

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