RK3000 High Frequency Power Supply
Operating Manual
Page 55 of 73
Waveforms #5 and #6, Automatic Parameter Adjustment with Sparking and Arcing
The percentage Phase Back and the Ramp Rate should be different for each electrical
field within the precipitator. The least Phase Back and greatest Ramp Rate are in the
inlet fields; and the greatest Phase Back and the least Ramp Rate are in the outlet field.
This is fine for initial adjustments, but what happens as conditions change within the
precipitator?
Sketch 5: Typical Control Without Arcing
Sketch 6: Typical Automatic Control With Arcing
The Phase Back, Ramp Rate and Pedestal Rate are all referenced to current levels. As
current increases, the Phase Back is automatically increased, the Ramp Rate is
automatically decreased, and the Pedestal Rate is automatically decreased, based on a
preprogrammed formula. Conversely, as power decreases, the parameters change in the
opposite direction. This means that once the control has been programmed for normal
maximum process operation, there is no need to reprogram the control as variations in
precipitator operation occur.