SHARDA Electronics & Co. Sangli, Maharashtra

SHARDA surge protection capacitors are of special type capacitors. Its application is of specialized nature i.e. in case of abnormal condition. These capacitors are designed for protection of large rotating machines such as motors & generators. At the time of over voltage during electric storms produces surges to electrical equipment’s connected to system. The voltage stress between turns of multi turn coil sets a limitation and surge voltage causes breakdown of turn to turn insulation resulting in short circuited turns. The surge capacitors restrict the applied surge to a point remote from the point of connection to the equipment to the system.

Sharda is producing power compensation capacitors since 20 years with fully technically & Experienced workmanship, new advanced machinery & well equipped testing & quality Control Laboratory Power compensation Capacitors reduces transmission & distribution Sub-stations and line feeders losses, improves efficiency. Here we are meeting just for introducing appearance of our SHARDA capacitors. Benefit of High Voltage capacitor : • High Di electric strength • Easy handling • High current handling capacity • Strong & economical design • Excellent performance

SHARDA branded LOW VOLTAGE i.e. up to 650volt, are from 5KVAr to 50KVAr in single units and for further range in banking system as per customer requirement. These L. V. Capacitors are of All PP type, oil filled having low loss, longer life and high voltage surge suppression strength. These Sharda branded LOW VOLTAGE capacitors not only reducing Cost of Electricity but also increasing remarkably the Efficiency of the System. LOW VOLTAGE conforms to Indian Standards IS: 2834 – 1986 & IS: 13585- 199

  The Metalized Polypropylene Film means that the capacitor with electrodes formed by vacuum evaporation of metal deposited directly onto the dielectric strength of polypropylene film was put to very effective use to produce avery compact and the light weight construction of capacitor. The construction of this type of capacitor is like having one sheet of Polypropylene Film in which an upper part is metalized with aluminum (Al) or zinc (Zn) with standard thickness having 0.2μm. Once we made a kind of sheet then it is wound on mandrill with specified number of layers as per calculation. After that, for outer connection purpose like making series or parallel connection we spread the zinc (Zn) spray on the top of the winding as well as bottom of the winding.  Due to this type of construction there is no possibility of occurrence of air packets or bubbles or moisture content in between the conducting & non-conducting material. That iswhy in this case there is no requirement of vacuum impregnation process. The self-healing property is the main property of Metalized polypropylene film. With the help of Metalized poly propylene film in capacitor, the arc discharge extinguishes without causing large damage. If defect area is small then capacitor will be in service without any interruption and self-healing property of Metalized polypropylene film is itself gives small area deflects. Such Capacitors can use under very high electric stress, which allows to store a large amount of energy in small volume. On the other hand, when there is a possibility of rapidly in creasing in voltage, current and temperature beyond its certain limit then insulation of that capacitor may get break down or some times degraded. Due to this internal short circuit, this part is of no use. But capacitor is heated and continually operated with slightly low capacitance. Self-healingis convenient feature for capacitor. But if the capacitors frequently operate at higher voltage, current, or temperature. Then it will reduce its capacitance more rapidly and finally it effects on frequency of that filter network.

For optimum utilization of available power the reactive power consumption should be reduced or nullified i.e. power factor should be unity, hence, most of the Power Distribution companies have policy to penalize the industrial and commercial consumers for not maintaining power factor above certain limit (generally above 0.90 value). However, due to reactive power drawn by capacitive or inductive load in the consumer premises the power factor is either lagging or leading, thus to maintain it within limit i.e. for compensating or supplying required KVAR, the capacitors (in case of lagging PF) or reactors ( in case of leading PF) are connected across the system. For stable load the fixed KVAR compensation is required , while for variable load the KVAR requirement also changes as per the load duration cycle, thus in such case the Automatic Power Factor control Panel is installed Electric Power quality is a term that has captured increasing attention in power engineering in the fresh years. The power quality is mainly depends on the needs of the equipment that is being supplied. Usually the term it refers for maintaining a sinusoidal waveform of bus voltages at rated voltage and frequency. The waveform of electric power at generation stage is purely sinusoidal and free from any distortion. All the Power conversion and ingesting equipment are also designed to function under pure sinusoidal voltage waveforms. However, lots of devices that distorted the supply waveform. These distortions may spread all over the electrical network. In fresh years, there has been an increased use of non-linear loads, which has resulted in an increased fraction of non-sinusoidal currents and voltages in Electric Network. Classification of power quality areas may be made according to the source of the problem such as converters, magnetic circuit non linearity, arc furnace or by the wave shape of the signal such as harmonics, flicker or by the radio frequency interference.     High and Low Voltage Capacitor Panel Application : For Improving Lagging Power Factor of peak loads Systems   Specification : • Multistage controller • Auto/manual controller • P.F. Closer to unity/Targeted • Thyristor/Contractor Switched • Zero voltage switching as per controller • Suitable for variable load.