Features of Automatic Voltage Stabilizer

The efficiency of power make stabilizers is more than 98-99% in comparison to 93-97% of conventional make available in the market depending upon the input voltage range. Thus, a 500 KVA conventional type stabilizer or conventional servo voltage stabilizers will consume additional power itself minimum Rs. 80,000 p.a. (even when running at 60% load and 20 hours a day) on account of its lower efficiency by 2%

The life of make servo voltage stabilizers is more than 10/15 years at full load in comparison to 2/3 years of conventional make.

Conventional type stabilizers are suitable for 30-40% load on continuous duty cycle. Our automatic voltage stabilizers are Heavy Duty & Industrial type and are suitable for 100% load continuous duty cycle. For running load of 200 KVA, generally 400 KVA / 500 KVA conventional type stabilizer is installed while make 200 / 250 KVA is suitable.

Our automatic voltage stabilizers are guaranteed unconditionally for 5 years in INDIA as compared to 1 year of conventional make.

Owing to its high efficiency and associated benefits, the payback period for the cost of POWER’S Servo Voltage Stabilizers 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.

We have all India servicing network to provide immediate service to our customers. The Service Engineers also visit monthly in their respective areas for routine check-ups. Also, servo controlled voltage stabilizers are categorized under ENERGY SAVING. The servo controlled voltage stabilizers should be such that its own consumption is minimum otherwise the basic concept of Energy conservation will be lost. Therefore while deciding for a stabilizer it becomes necessary to invest the capital over a period of time to ensure that its running cost is minimum and payback period is quickest. From the above facts, you will find that our automatic voltage stabilizers will cost much lesser in long run to conventional type stabilizers.

Automatic Voltage Controllers and Automatic Servo Voltage Controllers are designed for max. 35-40 degree temperature rise at top of oil whereas allowed limit is 50° C.

Inner View of Automatic Voltage
Controller Unbalanced Type with
Ultra Isolation Transformer

The core is constructed from low loss, cold rolled, grain oriented, annealed laminations of electrical sheet steel conforming to the latest international standards. Special frame is built in-house for clamping the core to reduce the magnetic noise as well as making the whole structure rigid and robust.

Coils are wound with paper covered electrolytic grade copper strip or synthetic enameled copper conductors. Cooling ducts are provided to keep the hot spot temperature as low as possible. Coils are dried in electric ovens. Rigid connection support and coil clamping is provided to ensure high short circuit strength.

Pre-compressed board PARMALI board and JAPANEESE insulation paper of best quality is used.

11. OIL
Oil tested for resistivity, dielectric and acidic characteristic conforming to IS 335. Before topping up oil is filtered throughly.

The tanks are made of M.S. steel plated / sheets with adequate bracing & stiffness. All the external surfaces are given a primary coat of Epoxy and finishing coat of Epoxy paint for better life.

AE meters and quality products for controls are used.

The table below gives approximate quantitative advantage of Automatic Voltage Controller at various fluctuation levels

% Reduction in Breakdown Possible Approx. Power Saving Possible
Input Voltage Variation Motor load below 10 Hp Lighting load Motor load below 10 Hp Lighting load
380 – 400 volts Nil Nil Nil Nil
380 – 420 volts 5% 10% 3% 5%
380 – 440 volts 10% 20% 5% 10%
380 – 460 volts 40% 40% 7% 20%
380 – 480 volts 60% 60% 10 30%

Comparison Between Power Make & Conventional Make Automatic Voltage Controller

  1. Power consumption is 0.5 to 1.5% depending upon the model and input voltage variation.
  2. Sutable for continuous 100% duty cycle.
  3. The carbon (graphite) Roller roll, while moving on the coil track, so contact Point of the roller goes on changing which prolongs the life of the rollers.
  4. Life at full load is 15-20 years.
  5. Negligible losses in full Buck / Boost Condition.
  6. Five years Unconditional warrantee in India

  1. Power consumption is 2 to 7% depending upon the model and input voltage variation.
  2. Sutable for continuous 30% to 40% duty cycle.
  3. Since the contact is by brush having flat surface, wear & tear of the brush is more and requires frequent replacement
  4. Maximum Life is 2-3 years at full load.
  5. Max losses in full Buck / Boost Condition.
  6. Normal warrantee for one year
Capacity Power make Roller type regulator losses Conventional make Carbon Brush type Dimmerstat losses
60 A 575 W 1050 W
75 A 730 W 2055 W
100 A 900 W 3105 W

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