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Instruction Booklet
Page 8 Effective: August 2010
ATC-300 2-Position 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
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