Tweco 3000 Merlin - Manual (Page 22)

INSTALLATION 3-4 Manual 0-2532
3.07 Voltage Selection
The Power Supply can be wired to use input voltages
from 200 - 575 VAC. Power Supply is factory-wired for
460 VAC, three-phase input. Voltage selection is accom-
plished by switching busbar connections on the input
voltage terminal board inside the Power Supply.
1. Locate the input voltage terminal board on the
left side of the power supply.
Input Voltage
Terminal Board
L1
L2
L3
Busbars
A-00985
Extra Busbar
Storage Location
Figure 3-4 Input Voltage Terminal Board Location
NOTE
Extra busbars are attached (stored) to the top
side of the power transformer assembly.
2. Check the busbar configuration on the input volt-
age terminal board . The busbar configuration
must correspond with the available line voltage
per the following figure and the label inside the
unit:
200, 208,
220, or 230
11 12
L3 13
15 14
6 7
L2 8
10 9
1 2
L1 3
5 4
380, 415,
or 460
11 12
L3 13
15 14
6 7
L2 8
10 9
1 2
L1 3
5 4
500, or 575
11 12
L3 13
15 14
6 7
L2 8
10 9
1 2
L1 3
5 4
Busbar Connections For Input Voltages
A-00904
Figure 3-5 Busbar Connections
If necessary, reposition the busbars to correspond to
the available line voltage.
3.08 Primary Power Cable
Connections
WARNING
Disconnect primary power at the source be-
fore connecting the primary power cable to
the power supply.
The primary power cable must be supplied by the end
user and installed to the Power Supply assembly. Rec-
ommended cable sizes are specified in Appendix I.
NOTE
Three-phase operation requires a 3-conduc-
tor cable with ground.
1. Route the primary power cable through the strain
relief fitting in the rear panel of the Power Supply
and tighten strain relief screws.