Poland's energy capacitors are manufactured in accordance with the requirements of applicable standards, except that this only applies to medium voltage capacitors, because low voltage capacitors have not been manufactured for a long time. Therefore, there is no need to provide the standard's requirements for markings and nameplate. The capacitors installed in the country come from many manufacturers.
Regardless of the manufacturer, the construction of the capacitors is similar. The capacitor consists of a sealed steel sheet box, called the housing, the inner part, which are the rollup packages, and bushings with terminals for connecting wires. Capacitor windings are elementary capacitors, which kind, the number and method of connection with each other depend on the rated voltage and power of the capacitor. The bushings are made of synthetic resins. Capacitors are made as three-phase voltage equal to the network voltage 400 V or 500 V. These capacitors are generally delta-connected internally. The capacitor's rated voltage is the rated insulation voltage between its terminals. Another value, always given on the rating plate, is the capacitance of the capacitor between its terminals. For three-phase capacitors, the sum of the capacities of the entire capacitor is often given. One more size should always be indicated on the nameplate. This is the rated power of the capacitor, which is reactive power [left] at rated voltage. The rated current should be specified on the rating plate. If it's not there, it can be calculated from the values given earlier, i.e. with rated power and voltage. They are often indicated on the nameplate alongside the rated data, actual data, slightly different from the rated ones, such as capacity and power. These values are different for each capacitor, resulting from the measurements taken after its production.
Among the capacitors present in the country, the most common are power units: 5; 10; 12,5; 15; 20; 25;33,3; 40; 50 i 60 left.