Line-side power components

Dùng để lắp đặt trước Biến tần, để lọc các sóng hài bậc cao do Biến tần tạo ra, làm thẳng điện áp vào biến tần, tăng tuổi thọ của biến tần.

Có 3 loại tùy chọn theo ứng dụng được liệt kê bên dưới, và lựa chọn theo bảng kê công suất Biến tần.

1.Line filters

Line-side power components protect the connected components against transient or continuous overvoltages and ensure that specified limit values are maintained.

2.Line Harmonics Filters

Line Harmonics Filters reduce the low-frequency harmonic effects of converters to a level that can otherwise only be achieved using 12-pulse rectifiers.

3.Line reactors

A line reactor is needed for high short-circuit power levels, partly to protect the actual converter against excessive harmonic currents, and thus against overload, and partly to limit the line harmonics to the permissible values. The harmonic currents are limited by the complete inductance comprising the line reactor and line supply cable inductance. Line reactors can be omitted if the line supply cable inductance is increased sufficiently, i.e. the RSC value must be sufficiently small.

RSC = Relative Short-Circuit power: Ratio of short-circuit power

SK line at the supply connection point to fundamental apparent output Sconv of the connected converters (according to IEC 60146-1-1)