Instructional Booklet
Page 32 Effective: March 2021
Operation and Maintenance Manual,
Automatic Transfer Switch Controller, ATC-900
For more information visit: www.eaton.com IB140012EN
Section 7: Historical & Event Display
The ATC-900 event and data logging history can be read on the
ATC-900's display or downloaded to a USB thumb drive. Every
ATC-900 transfer switch includes a front panel mounted NEMA
4X rated USB port for use in uploading downloading setpoints and
event data. Downloading event data provides the ability to more
thoroughly analyze information using a PC. It also allows data to
be quickly e-mailed when off site troubleshooting support is
required.
The information is time-stamped and has detailed resolution. An
example of a usage of this timing is with the 10 second rule for
critical applications. One could see the events and timing from
when power was removed to when the switch transferred includ-
ing engine start and source available.
Historical Data
Figure 1 5 . Historical Data Screen
The Historical Data display indicates historical and cumulative
counter values as follows:
• Source 1 Available
• Source 1 Connected
• Source 1 Engine Run
• Source 2 Available
• Source 2 Connected
• Source 2 Engine Run
• Tier 4 Timer
•· Load Energized
• Number of Transfers
Historical counter resets are date and time stamped events that
are captured in the event log.
Event Summary
Figure 16. Event Summary Screen
The ATC-900 controller stores a maximum of 500 time-stamped
events.
Events include:
1. Actions of the transfer sequence
2. Alarms
3. Changes to the setpoints
4. Changes to the time/date
5. Resetting a historical counter
6. Engine Run test
7. I/O State changes
For event details, the time-stamping resolution is 0.01 seconds
Events Details
Figure 1 7 . Event Summary Detail Screen
Each transfer event can be expanded to view a step-by-step, time
stamped, sequence of operation. All metered values are also
logged and can be viewed on the Event Data Screen.
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