SARASWATI ELECTRICALS

Samarth Nagar, Aurangabad, Maharashtra

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%

We bring forth high performing range of servo voltage stabilizers , which is manufactured from quality components and conforms to set industrial standards. Servo voltage stabilizers offered by us, are highly demanded among the clients owing to their qualitative features.

We are one of the major Suppliers of Silicon Power Rectifiers in the market. Silicon Power Rectifiers are especially designed for continuous rated current with adequate margin of safety. The Silicon Power Rectifiers made accessible by us are capable of working at 100% load factor. ADVANTAGES : Step-less On-Load Voltage Regulator Designed for 100% Continuous Load Nil Wave Form Distortion High Efficiency of up to 97% Virtually Zero maintenance SPECIFICATIONS : Output Voltage : From Zero to Maximum rated D.C. Voltage (upto 1000 Volts) Output Current : From Zero to Maximum rated D.C. Current (upto 15000 Amps) Input Voltage : 415 Volts, 3-Phase, 50 Hz, A.C. Supply Cooling : Natural Oil Cooled Modes of Operation : Manual Control Electrical with the help of push Buttons Mechanical with the help of T-Handle Ripple Content : Less than 5% Efficiency : 12 V Rectifier - 82% 24 V Rectifier - 90% 100 V Rectifier - 94% 200 V Rectifier - 96% 250 V Rectifier - >97% Special Features of our Rectifier Equipments : Our Rectifier equipments are wound with electrolytic prime grade copper strip to minimize power losses. In comparison to Aluminium conductor used by many other manufacturers. Our equipments are designed liberally as per capacity and are ideally suitable for marginal over loading conditions. Annealed Copper bus bars/ Aluminium Bus Bars of electrolytic grade with conductivity greater than 99.99% as per IS : 613-1984 are used. DIODES : Silicon Diodes are tested in house. Similar PIV batch and same forward drop diodes are used in the equipment for equal load sharing and reducing the power losses of diodes. The diodes in the rectifiers are fitted with suitable heat sink and hole storage resistors and capacitors. IPT : Inter Phase Transformer-IPT is connected between two star points of the secondary of the main transformer. The IPT improves the commutation, there by increasing the rating of the Rectifier. Lamination Core : we use imported CRGO lamination core which has minimum power losses and results in better efficiency of equipment and savings in energy bill. Meter : we use reputed make – AE/RISHABH or as per customers requirement. Optional Features : Constant Voltage Controller (CVC) Application : The CVC will automatically maintain a constant output voltage as per setting, irrespective of input voltage variation Advantage : By using CVC, uniform quality of plating can be maintained, thereby controlling excessive consumption of plating raw material at high voltage. Constant Current Controller (CCC) Application : The CCC will automatically maintain a constant output current as per setting, irrespective of inpt voltage variation. Advantage : By using CCC uniform quality of plating can be maintained, thereby controlling excessive consumption of plating raw material at high voltage. D.C. Overload Trip System Application : The DC Overload Trip system will sense the signal from the output of the Rectifier and trip the main contactor in case of overshooting the set range. Advantage : By using the DC Overload Trip System, the diodes will be saved during any accidental short circuit in the bus bars or in the tank. Zero Run Down System Application : with the help of Zero Run Down System, once the Rectifier trips or is switched off while working, it will automatically start from 0 volts when restarted. Advantage : This saves the diodes from sudden load current, thus increases the life of the equipment. Signal Isolators to enable automation / PLC compatibility Application : The signal Isolators can be used to avoid the milli-volt drop of the Ammeter / Voltmeter signals. The Isolators can give output in milli-Volts / milli-Amps. Advantage : Ideal for use when the Voltmeter/Ammeter panel is kept too far from the Rectifier. These signal Isolators are also necessary for the input signals to the PLC panel, i.e. to make the Rectifiers PLC-compatible.

We bring forth highly efficient Isolation Transformers (Special Purpose Transformers) in the market. Isolation Transformers are very effective for where sophisticated machinery/ computerized system are installed and there is problem in the failure of electronic cards in Automatic Voltage Controller. The use of Isolation Transformers is recommended for increasing the components life and prevention of failure rate of electronic circuits or sophisticated machines and leading to heavy losses of production. Features : High performance Easy installation Low maintenance cost Recommended For : Increasing the components life Prevention of failure rate of electronic circuits Optional Features : Step UP/DOWN Transformers : Copper wound Auto/Double wound step Up & Step Down Transformers suitable for 100% duty cycle. A.C. Variable Supply : Copper wound Variable Transformers with Rolling contact technology Step Controlled Rectifier : 15 Steps On Load Control Rectifier (40-100% DC Voltage Variation) complete with Meter panel

Our wide range of industrial stabilizers is sourced from reliable vendors and conforms to industrial standards. These industrial stabilizers are appreciated for their high performance and longer working life thus finds application in various industries. Moreover, we offer industrial stabilizers in varied specifications and at market leading prices.