CMS Series Capacitor The Capacitors are suitable for indoor capacitor units and capacitor banks in controllable or adjustable AC voltage systems with a nominal voltage not exceeding 4kV and a frequency of 50kHz and below, specifically designed to improve the power factor or circuit characteristics of induction heating, melting, stirring, or casting devices, as well as similar applications. The Capacitors conforms to JB7110-93 and IEC-60110 operating plants operating at frequencies between 40Hz to 24000Hz>.