Obstruction Lighting Controls

This new design leveraged the advantages of high speed digital switching by adding zero voltage detection circuitry to the traditional solid-state relay design. This circuitry evaluates the AC voltage at all times. "As the voltage progresses from zero to the peak voltage every 0.004 seconds, this circuitry prevents the lamp from being switches ON when the voltage is high." This eliminates a momentary surge of current that can break the lamp's fragile filament. Mechanical switches typically close when the voltage is above zero. The voltage tracking circuitry added to these control modules can extend the lamp life up to 10 times its normal life span.