Hobart GPU-600 Series, Operation And Maintenance Manual

Page: 27 / 116

OM-2244 / Operation and Maintenance Manual
DCS-600/ Series 500082/ Solid State Transformer-Rectifiers
December 15, 2014 Chapter 1-2
Page 3
b) Verify the Input Voltage Configuration
The GPU may be configured for various input voltages, depending on the specific model
(specification number). The factory pre-configures each unit before shipment according to the
customer specifications for the input voltage. While the GPU is open for connecting cables, verify the
voltage configuration. Figure 2 shows the interior panel as viewed from the right side of the GPU.
Figure 2 Input Voltage Configuration Locations
On the left is Voltage Changeover Panel, which sets the input voltage for the main transformer. On
the right is the control transformer, which has different taps for the various input voltages.
(1) Make sure the GPU is not connected to the electrical service.
(2) Remove the top cover.
(3) Locate the items pictures in Figure 2.
(4) Refer to Sheet 6 of the schematic diagram, which is located in Chapter 5 of this manual.
(5) Verify that the configuration matches the appropriate diagram on the schematic.
CAUTION
Reconnection of control transformer as well as main input connection panel must be
made when changing rated input voltage. See changeover diagram.
Changing the voltage configuration requires changes to main transformer T1 configuration on the
Changeover Board and changes to control transformer T2 by moving a yellow wire to a different tap
on the right side of the transformer. (See Figure 2)
Input Power Contactor
Control Transformer TR
Voltage Changeover
Board