Dynojet 150: Eddy Current Brake - Manual (Page 23)

E D D Y C U R R E N T B R A K E I N S T A L L A T I O N
Theta Controller
Version 8 Eddy Current Brake Installation Guide
1-17
240 VAC T HETA C ONTROLLER (P/N 66411003)
The 240 VAC Theta Controller is identified by the two external fuse holders. The 240
VAC Theta Controller is calibrated for a nominal 230 to 240 VAC line voltage; in
certain countries, line voltages of 210 to 220 VAC may be encountered and the dip
switch can be set to provide full output current of 10 amps even with the reduced line
voltage.
Note: This controller cannot be converted to operate on 120 VAC line voltage.
Power Line Frequency Adjustment—The Theta Controller is shipped with the dip
switch set for 50 Hz. Determine the correct line frequency and set the switch
accordingly.
Power Line Voltage Adjustment—The Theta Controller is shipped with the dip
switch set for normal (NORM) line voltage. In the NORM position, the controller is
calibrated for a nominal 235 to 240 VAC line voltage.
In some cases in Europe, it may be necessary to set the dip switch to the LO position
when the AC line voltage is consistently around or below 225 VAC and combined with
reduced brake performance.
• Measure the AC line voltage with all normal AC loads running in the shop (lights,
heater, etc.).
• If the line voltage is reduced to or below 225 VAC and remains at these levels, move
the switch to the LO position. This will boost the output current with the lower AC
power voltages.
Note: Be sure to review and comply with the model 250 motorcycle dyno
installation requirements before setting the dip switch to the LO position. The
Theta Controller should be on its own dedicated AC power circuit.
Note: If the AC power voltage returns above the 230 VAC range while the dip
switch is set to LO, overheating and damage to the eddy current brake or fuse
failure may result. Review the LO/NORM dip switch position setting and re-
measure your incoming AC line voltage.
Figure 1-23: Theta Controller—Europe and Australia 240 VAC Dip Switch Settings