For more information visit: www.eaton.com IB140042EN
Instructional Booklet
Page 12 Effective: May 2015
ATC-300/ 900 Breaker Based Transfer Switch
3.3.2 International Voltage Selection (208, 220, 240,
380, 415, and 600 V - 50-60 Hz)
The International market voltage selection panel is a multi-tap,
enclosed transformer mounted in the enclosure (Figure 14).
Seven front accessible voltages taps from 208 to 600 Vac satisfy
any required International market application voltage. A quick-
change capability from one voltage to another is provided by a
small disconnect plug. The factory default position is 600 VAC.
Figure 14. International Market Vertical Design Voltage Selection
Panel with Voltage Being Selected.
3.4 ATC-300 and ATC-900 Controllers
The Controller panel provides the intelligence and supervisory cir-
cuits which constantly monitor the condition of both the Source 1
and Source 2 power sources, thus providing the required intelli-
gence for transfer operations (see Figures 15A and 15B). Detailed
information for controller operation is presented in separate docu-
ments:
• ATC-300+ Instruction Book (IB01602009E); and
• ATC-900 Instruction Book (IB140012EN).
• For current metering, there is a DCT module available that
attaches on to the back of the ATC-900. The DCT also serves
as a 24VDC input for backup power to the controller, to keep
communications functioning during power outages. See the
ATC-900 instruction booklet for more information.
• I/O Modules are available that will increase inputs and outputs
(4 in and 4 out per module) if additional I/Os are required. See
the ATC-900 instruction booklet for more information.
.
Figure 15A. ATC-300+.
Figure 15B. ATC-900.
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