Today, with the increase of automation systems in all production and service sectors, the use of semiconductor elements in control circuits instead of relays has significantly increased. The main characteristic of these components is the alteration of the sinusoidal waveform of the mains electricity and its conversion into waveforms that do not have a sinusoidal shape but have periodicity.

Mathematical calculations have proven that every periodic wave is composed of a set of sinusoidal waves with the fundamental frequency of the wave and its harmonics. The wave with the fundamental frequency is called the fundamental wave, and the other waves are referred to as harmonics based on their frequency. For example, the third harmonic, fifth harmonic, and so on. In other words, in a network with a frequency of 50 hertz, the third harmonic will have a frequency of 150 and the fifth harmonic will have a frequency of 250 hertz.

Since the impedance of a capacitor is inversely proportional to the frequency of the wave, it has lower impedance at harmonics, allowing a higher current to pass through it, which causes premature failure of the capacitor; when the resonance frequency of the capacitor aligns closely with the frequency of one of the harmonics, the situation becomes much more critical.

To address such an issue, a reactor is used in series with the capacitor. The series combination of a reactor with a capacitor reduces the resonance frequency of the branch to the designed level, and this combination effectively acts as a filter that has capacitive properties at low frequencies and inductive properties at high frequencies.

This property prevents premature failure of the capacitor.

Applications of harmonic filter reactors:

By electrically connecting harmonic filter reactors in series with power factor correction capacitors, the system impedance increases.

Applications of drive reactors:

Drive reactors are placed at the input and output of drives that are used to control the speed of electric motors.

Other products of this Company

Power factor correction regulators

Capacitor contactors

Harmonic filter contactors

Automatic capacitor banks