Automatic Voltage Controller

Listing ID #73793

We are engaged in offering a proven range of automatic voltage controller that is used for maintaining the desired voltage and to reduce the breakdown of electrical equipments due to low or high voltage. These automatic voltage controllers are suitable for all electrical equipment and are available in the range of 30 kva to 3500 kva. features of our automatic voltage controller given below are a few of the superior features of our servo voltage stabilizer as compared to the conventional ones :

• we are using square copper section to facilitate more current carrying capacity.
• we insist on the use of chain drive allowing the regulating transformer to be driven at relatively higher speeds yielding smooth commutation avoiding potential jamming.
• we use carbon roller assembly instead of ordinary brushes. The torroidal type dimmer has to be cleaned very often because the brushes wear deposit and carbon on the track. The roller assembly used by us yields very low wear with the contact life expectancy exceeding 1, 00,000 meters of track level.
• in case of jerking loads the normal carbon brush tends to wear off because of its size limitation which would ultimately affect the efficiency of the system, whereas our roller assembly with stands jerks very effectively without hampering the working.
• the core is built from grain oriented silicon steel laminations which keeps iron loses to minimum values. The flux density is not allowed to rise to the saturation points thus reducing output waveform distortion.
• our systems are built to withstand an overload of 20 times than normal current for a small period, which is a unique feature in itself. The conventional ones will immediately burn in case of any overloading.
• the efficiency of our stabilizer at 75% load is more than 99%.
• advantages of our automatic voltage controller : in case, you find that your input voltage is higher even for few hours a day – then you can reduce failure rate of electrical equipment by installing saraswati’s avc & will have following advantages: reduction in breakdown of electrical equipment : 60 – 80% reduction in breakdown of motors, contactor coils, bulbs, tubes etc. Depending upon the input voltage variation and working hours of the plant. energy saving : with the installation of avc, 5-10% power saving is certainly possible. Power losses of any electrical equipment increase at low or high voltage. With the stabilized voltage at 390-400 volts, the extra losses generated due to low high voltage can be considerably reduced that will automatically result in energy saving. reduction in mdi (max demand indicator) : there will be definite reduction in mdi by 10 – 15% after the installation of an avc. Mdi is a multiplication of voltage & current and is half an hour reading. At higher input voltage, the current of electric motors also increases. So, the mdi also increases. for example :
  • consider a 10h.p.motor
  • suppose, current at 400 volts = 12 amps
  • current at 450 volts = 14 amps
  • mdi at 400 volts = (400 x 12 ) 1000 = 4.8 kva
  • mdi at 450 volts = (450 x 14 ) 1000 = 6.3 kva
  • % increase in mdi at 450 volts as compared to 400 volts = ((6.3 – 4.8) 4.8) x 100% = 31.25%
  • even if the high voltage occurs for half an hour in a month, the mdi increases. With the installation of the avc, the voltage will be controlled and mdi will also be controlled. improvement in power factor : whenever the voltage increases above 440 volts, there is a sharp reduction in power factor at least by square function of voltage. At higher input voltage (i.e. >400 volts), excitation current (no load current) of the industrial motors increases. The power factor of no load current is normally (0.2). So as the voltage increases, the excitation current also increases which further lowers the power factor. By maintaining constant voltage at 390400 volts with help of avc, there will be definite improvement in power factor by 10-15%. uniform quality of end product & increase in throughput : with stabilized input voltage to your sensitive production equipments, you can ensure that your production processes run consistently & continuously, without any interruption aberration, thus ensuring uniform quality of end product as well as increase in output. depreciation allowance @ 80% as per income tax act. Pay-back period: owing to the high efficiency of our avc (> 99% in avg. Running conditions) and its associated benefits, the payback period of our avc is normally within 6-12 months, depending upon the input variation and the number of working hours. specifications high voltage% reduction possible in breakdown of electrical equipments with avc% power saving possible with avcmotor below 10 hplighting loadmotor below 10 hplighting load380-400 vno reduction and no avc requiredno power saving and no avc required400-420 v5%10%3%5%420-440 v10%20%5%10%440-460 v20%40%7%20%460-480 v40%80%10%30%