RK3000 High Frequency Power Supply
Operating Manual
Page 9 of 73
Potential Transformer
The Potential Transformer (PT) measures the transformer primary voltage and provides a
reference signal to the Control Unit. The PT has a ratio of 600 volts to 20 volts. The
signal is used for primary voltage display and limit.
Figure 5: Potential Transformer
Secondary Signal Conditioning Resistors
Signal conditioning resistors are provided for both the secondary current and secondary
voltage reference signals. Their values will vary depending on the transformer-rectifier
rating. See schematic diagrams for proper values. These signals are sent to the Control
Unit for secondary voltage and current display and limits, as well as spark pickup. Full
scale is represented by a 5V signal.
Figure 6: Secondary Signal Conditioning Resistors