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

Analysis of high pressure sodium lamp magnetic ballast and electronic ballast and energy saving performance comparison:

Harmonic content and power factor. The input current waveform is square wave and the current lags behind the voltage. The harmonic content of the input current is high, and the power factor of the compensation capacitor is only about 0.6. Even with the compensation capacitor, the power factor is also very difficult to achieve more than 0.95, the harmonic content is still high. This caused core ballast serious pollution of the grid, increase network load, increasing the cost of installation. And high frequency electronic ballast with power factor correction circuit, the input current harmonic content is less than 10%, power factor is higher than 0.95, on the grid basically no pollution, can reduce the power load, reduce installation costs, of the original ballast lighting system directly compatibilizer.

Electromagnetic compatibility issues. In addition to the input current harmonic content is low, the electronic ballast can fully meet EMI and EMS requirements, so as to improve the reliability of the entire lighting system rectifier effect and close to the end of life, there will be a bright lights frequently, destroy, resulting in ballast loss increase, the temperature increased. Electronic ballast can achieve comprehensive protection function, according to the lamp, the lamp terminal short circuit, the heat lamp, the rectification effect and the lamp life of the phenomenon, block the output of electronic ballast.