Operation - Eaton ATC-800 Instructions For Installation, Operation And Maintenance

Instructional Booklet
Page 14 Effective: March 2012
3.4.6 Setpoints Display
This display indicates presently programmed setpoints. The set-
points can only be altered in the Program Mode. Keep it mind, if a
feature was not originally ordered and programmed, it will not be
displayed (Figure 8). Refer to Section 5 for details.
3.4.7 Help Display
This display presents moving English language messages, explana-
tions and prompts to assist the operator while in any of the three
operational modes. When the Help Pushbutton is pressed and
released a second time during the scrolling of a message, the mes-
sage is aborted.
Section 4: Operation
4.1 General
This section specifically describes the operation and functional use
of the ATC-800. It is divided into three main categories:
• Automatic Mode
• Test Mode
• Programming Mode
The practical use of and operation within each specific category
will be discussed. In this section it is assumed that prior sections
were reviewed and that the operator has a basic understanding of
the hardware. It is important that the operator have a good grasp
of the functional use of the operator panel as covered in Section
3. This will make movement within each category and between
categories a simple task. This familiarity will quickly put the unsur-
passed capabilities of ATC-800 at the operator's fingertips.
IT IS IMPORTANT TO REMEMBER THAT ATC-800 CONTINUES TO
PROVIDE PROGRAMMED PROTECTION AND AUTOMATIC OPERA-
TION NO MATTER WHICH MODE THE DEVICE IS IN AT THE TIME IT
IS CALLED UPON TO OPERATE.
REFER TO APPENDIX D FOR AN OVERALL VIEW OF ATC-800 OPER-
ATIONS IN THE FORM OF A MENU TREE.
4.2 Automatic Mode
The Automatic Mode of ATC-800 provides for automatic transfer
and re-transfer from source to source as dictated by the features
supplied and their programmed setpoint values. It provides a sum-
mary of ATC-800's intelligence and supervisory circuits which
constantly monitor the condition of both normal and emergency
power sources thus providing the required intelligence for transfer
operations. These circuits, for example, automatically initiate an
immediate transfer of power when power fails or voltage levels
drop below a preset value. Exactly what ATC-800 will initiate in
response to a given system condition depends upon the combina-
tion of standard and selected optional features. Refer to Para-
graphs 1.3 and 1.4 for ATC-800's standard and optional features.
When the preferred source is connected and the automatic trans-
fer switch is operating normally, the Automatic LED blinks green
and no message appears in the display window. In the event of a
power failure, the display automatically becomes active showing
the status of timers relative to an alternate source transfer. Once
the alternate source becomes available, the transfer is made con-
sistent with pre-programmed features. In a similar manner, trans-
fer back to the preferred source is made once the preferred source
is again available. System conditions relative to the sources and
the load are clearly indicated by the LED type mimic bus.
4.3 Control Inputs
As described in Section 2, the rear access area provides for
access to all input connections. Each contact input provides 50
volts at 10ma. Refer to Figure 3 for a graphical representation and
position of all input connections.
For more information visit: www.eaton.com
Instructions for Installation, Operation and Maintenance of the
Eaton ATC-800 Closed/Open Transition Transfer Switch Controller
NOTICE
NOTICE
IB ATS-C103