Voltage Selection Panel; Logic Panel; Neutrals; Options (Non-Logic Panel) - Eaton Cutler-Hammer O & M Manual

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The switching device is closed by energizing a spring
released solenoid that releases the spring mechanism. A
shunt trip will open the switching device if energized.

3.3 VOLTAGE SELECTION PANEL

The voltage selection panel is a multi-tap enclosed
transformer mounted in the enclosure (Figure 3-5).
Seven front accessible voltage taps from 208 to 600
volts AC satisfy any required application voltage. A
quick change capability from one voltage to another is
provided by a small disconnect plug.

3.4 LOGIC PANEL

The logic panel provides the intelligence and superviso-
ry circuits which constantly monitor the condition of both
normal and emergency power sources thus providing
the required intelligence for transfer operations (Figure
3-6). Detailed information is presented in a separate
document:
• ATC-600 Instruction Book (open transition only)
• ATC-800 Instruction Book (closed transition only)

3.5 NEUTRALS

All 2-pole and 3-pole transfer switches are equipped
with 100-percent-rated neutral connections (Figures 3-7
and 3-8). Different lug configurations are available,
Option 21A.
Figure 3-5 Voltage Selection Panel (Engine Start
Contacts Identified)

3.6 OPTIONS (NON-LOGIC PANEL)

Switch options, which are not part of the logic scheme,
are available to meet a variety of other application
requirements. Options are numbered with an associat-
ed description. More detailed selections that must be
made within a specific option are lettered. For available
options associated with the logic scheme, refer to the
specific logic document associated with the type of logic
selected.
NOTICE
Options are Underwriters Laboratories, Inc. listed,
except as noted, when supplied on UL Listed
Switches. If an option is selected that is Not UL
Listed, the switch Will Not Have A UL Label.
ATC-800
Figure 3-6 ATC-600/ATC-800
IB01602002E
ATC-600
Effective 10/02