Multi-stage metal-enclosed medium-voltage capacitor banks are designed for systems such as industrial, commercial, and utility power systems involving motors, feeder circuits, and transmission and distribution lines where power factor improvement is required.
Individual fixed capacitors provide power factor correction directly at the cause of the problem, such as large horsepower MV motors. Medium-voltage systems allow large facilities to correct power factor at or close to the point of common coupling (PCC), where the utility electrical system meets theirs.
liminate the switching overvoltages of MV capacitors by using a synchronous capacitor switch. In the previous example, where a DS1 was used eliminate the switching overvoltage, one ca
1 and 3 p.u. for the installation in question, i.e. at voltage between 8.16 kV and 24.49 kV.We will now consider two frequencies: the first refers to capacitors switched-in four times a day (f=4
m consists of three three-phase capacitor banks, each controll d by its own switching device. We will assume that each bank is switched-in four times a day.Two different solutions will now be compared in which the capacitor b nk are switched by a conventional device in the first case and by a DS1 in the seco the diode-based synchronous ca
On 2.4 kV to 4.8 kV multi-stage capacitor systems, each stage is controlled by low maintenance Eaton “SL” AMPGARDT three-pole vacuum contactors. On 6.6 kV to 14.4 kV multi-stage capacitor systems, each stage is controlled by low maintenance single-pole vacuum switches. Three-pole zero voltage control switches are available as an option.