What are the common voltage ratings for capacitor installations?

The common voltage ratings for capacitor installations often align with industry standards that reflect practical requirements in electrical systems. The correct choice includes 300, 600, 1200, and 1800 volts, which are typical ratings used in various applications, particularly for medium voltage applications.

300 volts is often used in lower voltage systems, while 600 volts is a commonly encountered rating in both industrial and commercial applications. The higher voltage ratings of 1200 and 1800 volts cater to specialized applications that require even greater operational safety and efficiency, frequently seen in larger electrical systems and distribution networks. This range ensures that capacitors can effectively handle the voltages they are subjected to without the risk of failure or inefficiency.

Other options do not represent standard voltage ratings typically recognized in the industry, with the given voltages either being too low or not aligned with common practice, which could lead to equipment incompatibility or operational challenges.