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

The power supply voltage through the hps ballast and lamp filament immediately applied to the electronic ignitor poles. 220 volt ignitor immediately make inert gas ionization, glow discharge. The heat of the glow discharge bimetal thermal expansion, the bipolar contacts. Current through the ballast, ignitor contact electrode and filament ends constitute pathways. Filament current was quickly heated, emits a large number of electrons. At this time, since the ignitor poles closed between the poles of the voltage is zero, glow discharge disappeared, the tube temperature is reduced; bimetal automatic reset, poles disconnected. Disconnect the moment at the poles, the circuit current is suddenly cut off, have a great self-induced emf ballast, superimposed upon the supply voltage applied to both ends. When heated filament electron emitted from a large, high voltage across the lamp under the action with great speed from low potential to high potential side terminal movement. In the acceleration process, the argon gas molecules collide tube, so that the rapid ionization. Electronic trigger abnormal protection, in the conventional electronic trigger circuit two ends of the resistor divider branch access delay circuits. When the lighting circuit is abnormal, the bulb end of the pressure was maintained in the power grid voltage exceeds the set time, the metal oxide semiconductor field effect transistor, is not enough to trigger diode, electronic trigger stop working. The main advantage of this utility model is a abnormal state protection after power lamp does not start, stop triggering within 5 minutes, to avoid long-term trigger for light bulbs, electrical accessories and high-voltage shocks trigger itself, affect life expectancy, but also to avoid long-term electrical equipment near strong electromagnetic interference.