China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

The HID electronic ballasts and the lamp, the combination of the effective utilization of the input power, in some places, also expressed as Watt / VA or COSΦ of. Generally the inductance ballast high pressure sodium electronic ballast
PF 0.5, even after capacitor correction can only reach about 0.8 electronic ballast can usually do from 0.95 to 0.99, its significance is that you make full use of every watt of power plants confessed, and the Environmental Protection made outstanding contributions.
Total harmonic distortion THD (TotalHarmonicDistortion), Input supply current odd harmonic components and reach steady state operation, the lamp ballast lamp rated supply voltage work. According to Bo Li Ye Dingyi rectangular wave is composed of a series with a common period but different frequency sine wave superposition, then the greater the harmonic content of the input sinusoidal waveform destruction greater. More occasions in the use of electronic ballasts, THD value larger will affect the three-phase AC input neutral current, neutral current will be too large because the sine wave is destroyed, it is generally in the large-scale use of electronic ballasts selected when THD between 15% -25% of the cost performance will be more suitable.
Crest factor CF (CrestFactor)
Rated supply voltage, supporting the work of the ballast and the lamp when the lamp to reach steady state. Flowing through the electronic ballast of the lamp current state output current
The peak value and the rms value of the ratio CF = PK / rms. Popular talk CF smaller the value, the more stable the current flowing through the tubes, the longer lamp life.