Kaliburn SR-100i, User Manual, Page: 48 / 75

Maintenance and Troubleshooting SR-100i User’s Manual
220/380V 50 Hz TRANSFORMER CONFIGURATIONS
220V 50 Hz and 380V 50 Hz power supplies are shipped with a dual voltage main
transformer TR1. The primary taps on TR1 are labeled with their corresponding
voltages. To change the operating voltage for these systems, perform the
following procedures.
220V 50Hz Operation
For 220V operation, install a #8 AWG jumper wire from 220V on the first
primary winding to 0V on the second primary winding. Install a second #8 AWG
jumper wire from 220V on the second primary winding to 0V on the third primary
winding. Install a third #8 AWG jumper wire from 220V on the third primary
winding to 0V on the first primary winding. Connect the three phase primary
power from the main contactor to the 220V connection on each primary winding.
See Figure 7-3.
When the primary voltage of TR1 is changed, the control
transformer TR2 must also be rewired for the correct service voltage . For
220V operation, connect the white wire of control transformer TR2 to TB2-13,
connect the brown wire to TB2-14, and connect a wire (#20 AWG minimum)
from the side terminal of fuse F1 to TB2-14.
380V 50Hz Operation
For 380V operation, install a #8 AWG jumper wire from 0V on the first primary
winding to 0V on the second primary winding. Install a second #8 AWG jumper
wire from 0V on the second primary winding to 0V on the third primary winding.
Connect the three phase primary power from the main contactor to the 220V
connection on each primary winding. See Figure 7-4.
When the primary
voltage of TR1 is changed, the control transformer TR2 must also be rewired
for the correct service voltage
. For 380V operation, connect the white wire of
control transformer TR2 to TB2-13, connect the brown wire to TB2-14, and
connect the gray wire to the side terminal of fuse F1.
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