For more information visit: www.eaton.com IB01602008E
Instructional Booklet
Page 12 Effective: March 2014
ATC-300 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 Logic Panel
The ATC-300 is a microprocessor-based transfer switch logic con-
trol package. The hardware and software of the controller contain
the intelligence/supervisory circuits that constantly monitor the
condition of the power sources. It provides the intelligence neces-
sary for the operation of the ATS (Figure 15).
Figure 15.ATC-300 Logic Control Panel.
The ATC-300 controller has an operating temperature of
-20 to 70°C (-4 to 158°F).
The controller circuit board is protected by an insulating conformal
coating.
The specifications, under normal operating conditions, are as fol-
lows:
• Tolerance for voltage sensing function: ±1% of setting
• Tolerance for frequency sensing function: ±0.3 Hz of setting
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