Single-phase capacitors for reactive power compensation and filtering applications. ABB AC wet-type capacitors are available in sizes up to 1,200 kvar per unit (at 50 Hz), and are characterized by negligible losses and high reliability. They consist of thin dielectric polypropylene film wound together with electrodes of aluminum foils. Fusing technologies available for these capacitors include internally fused (CHDB), externally fused (CHDE) and fuseless (CHDF) executions.