For more information visit: www.eaton.com
IB140024EN
Instruction Booklet
Page
8
Effective: October 2014
ATC-300/900 40-400A (480/600Vac)
3-Postion Contactor Based Transfer Switch
Figure 7. Standard Voltage Selection Terminals (Shown
Connected to the 480 Vac Taps).
3.4 ATC-300+ Logic Panel
The ATC-300+ is a microprocessor-based transfer switch logic
control package. The hardware and software of the controller
contain the intelligence/supervisory circuits that constantly moni-
tor the condition of the power sources. It provides the intelli-
gence necessary for the operation of the ATS (Figure 8).
Figure 8. 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 confor-
mal coating.
The specifications, under normal operating conditions, are as fol-
lows:
■
Tolerance for voltage sensing function: ±1% of full scale
■
Tolerance for frequency sensing function: ±0.3 Hz of setting
