POWER capacitors are generally utilized in substations to compensate power factor at load side as well as improve voltage profile. Most of power system administrators force their industrial customers to install power factor correction capacitors to decrease reactive power consumption. In distribution system, capacity of all installed capacitors is between 25 percent and 30 percent of total load. However, these capacitors make undesired disturbances during transients such as energizing, back to back switching and short circuit fault condition. Nowadays, more sensitive loads are connected to...

Large industrial motors are used for auxiliary operations in industrial establishments like cement plants, paper and pulp industries. For switching operations generally SF6 or medium voltage vacuum breakers are used. Depending upon the nature of duty, there are frequent switching-in and switching-off operations. Occasionally, there is likelihood of faults also in the motor winding due to insulation failure of winding coils. The connecting distances involved between the power supply point and the motors are generally of the order of kilometer due to the width and breadth of the above...

Leistungskondensatoren werden im Allgemeinen in Umspannwerken eingesetzt, um den Leistungsfaktor auf der Lastseite zu kompensieren und das Spannungsprofil zu verbessern. Die meisten Netzbetreiber zwingen ihre Industriekunden zur Installation von Blindleistungskompensationskondensatoren, um den Blindleistungsverbrauch zu senken. Im Verteilnetz liegt die Kapazität aller installierten Kondensatoren zwischen 25 und 30 Prozent der Gesamtlast. Diese Kondensatoren verursachen jedoch unerwünschte Störungen während Transienten wie Einschaltvorgängen, Rückwärtsschaltungen und Kurzschlussfehlern....