The sine filter provides the following functions:

• The filter reduces the level of harmonic distortion of voltage and current, which improves the quality of electricity and reduces equipment heating.
• Protects the load from surge voltages and overheating that may occur during long cable runs.
• Cooling fans turn on automatically when the reactors heat up, preventing overheating and extending the filter life.
• Discharge resistors on capacitors ensure the safety of service personnel.
• Compartments for reactors, condensers and controls provide easy access for maintenance.