RK3000 High Frequency Power Supply
Operating Manual
Page 17 of 73
the control. This time delay allows for a ground condition to clear before the control is de-
energized.
DEFINITION OF NON-PROGRAMMABLE FEATURES
The following are definitions of the non-programmable features that are built into the
RK3000 control.
Arc Numerical Display
The Electrical Reading Screen shows the number of Arcs Per Minute that are occurring.
Automatic Display Calibration
External variable resistors perform the calibration for the control feedback signals. These
resistors are located on the primary current transformer (CT) and on the secondary
current and secondary voltage signal conditioning resistor panel. It is not necessary to
recalibrate any part of the control if replacing a Keypad and Display Unit or a Control Unit.
IGBT Firing Delay
A firing delay of 30 seconds is required for the system to charge the rectifier bank
capacitors. This delay only occurs when the power to the cabinet has been turned off and
then on again (power loss or breaker trip).
Soft Start
When the on/off switch is turned on the conduction of the IGBT is slowly increased, and in
turn the power to the precipitator. This slow power rise eliminates current inrush on the
power feeders and substations.
Spark Indicator and Numerical Display
The Electrical Reading Screen shows the number of Sparks Per Minute that are occurring
as well as a decimal point that flashes each time a spark occurs.
True RMS Primary Voltage and Current Displays
The primary voltage and current are displayed as true RMS values, not average values.
Manual Control
Should the need arise; the control can be operated in the Manual mode. An auto/manual
toggle switch is located on the upper right of the Control Unit (see page 58). When
switched to Manual mode, the message “Manual Mode” will be displayed on the display
status line. When in manual, the control can be operated between 0 and 100% of
conduction by adjusting the Manual bias potentiometer located in the mid right area of the
Control Unit
Non-Volatile Memory
The RK3000 utilizes EEPROM (electronically erasable programmable read only memory)
for storage of all preprogrammed and field-programmed information. EEPROMs do not
require battery backups and are a nonvolatile memory with indefinite storage life.
Watt Meter
The instantaneous power consumption of each TR control is displayed on a continuous
basis on the Electrical Reading screen.