Harmonic is a wave with a frequency that is a positive integer multiple of the fundamental frequency, the frequency of the original periodic signal. The original signal is also called the 1st harmonic. ZDDQ AHF is the expert for harmonic filtering in power system. Main for:

1. Ultra-fast reactive power compensation(Inductive and capacitive);
2. Load balancing between phases and unloaded neutral wire;
3. Harmonic Compensation up to 50th harmonic(Individual selectable);
4. Flicker compensation;
5. Reduce overheating/Reduce nuisance tripping/ Reduce overloading/Reduce equipment failure.

The following pictures were taken in the plastic cup production workshop:

In the heating and melting process of plastic particles, a large number of equipment need to use frequency converter, and the total current harmonic distortion rate of the system is very high like the above picture shows. In this case, ZDDQ Active Harmonic Filter can reduce the THDi within 5% in sufficient capacity.