Low-frequency chokes

These chokes enable filtering of harmonics in the grid current and improve the total harmonic distortion (THD); they protect the system from current surges.

Chokes of this type are used to connect converters and drives to the grid. They are used as a system for suppressing slow-variable disturbances and improving the current shape.

Typical parameters:

• RMS rated current: Depending on the application, typically up to 1,000 A
• Rated voltage: ≤ 5,000 V
• Insulation class: B, F, or H
• Protection rating: IP00-IP67
• Mounting/installation method – open, cast in resin, impregnation