Energy saving lamp controller works by delaying the trigger pulse to some point in the half cycle of the ac wave. This trigger point, from 0 to 180 degrees, is referred to as the phase angle .the scr will turn on when triggered, and remain on for the rest of the half cycle. Increasing the control fireing will cause the trigger pulse to occur earlier in the half cycle, thus delivering a greater portion of the wave to the load. (note: some rfi can be generated from the unit). We maintain the output supply voltage constant (200 volts a.c)by varying the scr firing angel automatically.
Chennai, Tamil Nadu, India
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