Specifications

82 Distribution Products Catalog CA08101001E—October 2010 www.eaton.com
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16.5
Tr a n s f er Switches
ATC Controllers
Features, Benefits and Functions
Switch Application Section—
Eaton Closed Transition
(ATC-800) Features
The closed transition ATC-
800 is a door-mounted, totally
enclosed device that is
customer accessible from the
transfer switch front panel.
Data access and programming
operations are performed
using the ATC-800 Transfer’s
touch-sensitive function
buttons in conjunction with
an easy-to-read, illuminated,
alphanumeric LED display.
Both the function buttons
and the display window are
part of the device’s front
panel. A built-in Help button
provides user assistance in
the form of message displays.
The ATC-800 is
communications ready
and compatible with all
Eaton IQ devices as well as
the Eaton PowerNet system-
wide supervisory and control
software. This permits
monitoring and control of
several transfer switches,
locally or remotely, from a
single point.
Additional Features
●
Source paralleling duration
is limited to 100 msec
or less
●
True rms three-phase
voltage sensing on normal,
Source 2 and Load
●
Frequency sensing on
normal and Source 2
●
Programmable set points
stored in nonvolatile
memory
●
PowerNet communication
to personal computer
either on site or remote
●
Historical data on most
recent transfers (up to
16 events) viewable at
switch. Unlimited history
storage (remote) available
when used with PowerNet
software
●
Wide range of user-
selectable option
combinations
●
Load sequencing
●
Engine start contacts
●
Engine test switch with
user-selectable test mode
and fail-safe
●
Alarm contact (multiple
alarm functions available)
●
Pretransfer signal
●
Heartbeat monitor (flashing
green Automatic light
signifies that the ATC-800
is operating properly)
●
Instrumentation:
●
Voltmeter
(accuracy ±1%)
●
Reads line-to-line
on Sources 1 and 2
and Load
●
Frequency meter
(40–80 Hz, accuracy
±0.1 Hz)
●
Source available time
(both sources)
●
Source connected time
(both sources)
●
Source run time
ATC-800 Programming
Button Functions
Three buttons provide easy
access to all commonly used
ATC-800 functions.
When the preferred source is
connected and the ATS is
operating normally, the
automatic indicator light will be
flashing and the display
window will be blank.
Using the Display Select
button, the operator can step
through each of the six
display families:
●
Source 1
●
Source 2
●
Load
●
History
●
Time/date
●
Set points
Note: Stepping through the
various display modes does not
alter preset values or otherwise
affect operation of the ATS.
Once the desired display
family is selected, the user
may press the Step button
to cycle through specific
parameters or metered
values shown in the
display window.
Initial Programming
Factory programming will
load all customer-specified
functions and presets. At the
customer’s request, Eaton
will add, delete or adjust
optional features.
Customer Programming
Customers may reprogram
set points and other
parameters to match
their application, using the
program switch located on
the rear of the unit. Once the
programming mode has been
activated and the program
light is flashing, the user may
access set point settings by
pressing the Display Select
button until the set points
LED is illuminated. Values
for individual set points may
then be altered by pressing the
Increase or Decrease buttons.
Once a parameter has been
reset, the user advances to
the next set point by pressing
the Step button.
While the ATC-800 is in the
program mode, the device
continues to operate in
accordance with the
previously programmed
set points and parameters.
The unit is never offline,
and preset values do not
change until programming
has been completed.
Once reprogramming is
complete, the user may
return the program switch to
the run position. At this point,
all new values are stored in
the ATC-800 non-volatile
memory, and the unit returns
to Automatic mode.
Definitions
Closed transition: Closed
transition is a feature that will
temporarily parallel two live
sources in a make-before-
break scheme when
performing a transfer. The
ATC-800 will close the
switching devices for both
sources,
paralleling both
sources, for a maximum
time
of 100 milliseconds after the
sources are synchronized.
Open transition/in-phase
monitor: In-phase monitor
is a feature that will allow
a transfer between two
sources only when the phase
difference between the two
sources is near zero. This is
an open transition transfer
that prevents inrush currents
from exceeding normal
starting currents in the
case where motor loads
are being transferred.
Open transition/delayed
with load voltage decay:
Load voltage decay transfer is
a feature that, after opening
the switch for the original
source, holds in the neutral
position until the voltage on
the load is less than 30% of
rated voltage. This is an open
transition that
prevents inrush
currents from exceeding
normal starting currents in
the case
where motor loads
are being transferred
.