Eaton ATC-900 Operation And Maintenance Manual - page 20
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IB140064EN
Instructional Booklet
Page 20
Effective: April 2018
Operation and Maintenance Manual, Automatic Transfer Switch, Bypass Isolation,
Contactor Type, Open/Closed Transition, ATC-900 Controller, 3000A Frame
5.2 Operator Panel
The design of this transfer switch allows quick removal of either
contactor for inspection or maintenance or, if required, quick
replacement. Although a contactor may be removed, the other
contactor is automatic including Closed Transition. Figure 24
shows the simple operation panel with some descriptive words.
Figure 24. Operating Panel.
* Door(s) must be closed and latched for Automatic or Non-Auto Operation.
This side is for the top contactor
Bypass (#2)
Automatic Operation of the
Bypass Switch. The ATS can be
isolated and electrically tested
(with the Test switch in the Enable
position) or removed.
This side is for the bottom contactor
ATS (#1)
Automatic Operation of the ATS
Switch. The Bypass Switch can be
isolated and electrically tested (with
the Test switch in the Enable position)
or removed.
Non-Auto operation of the
Bypass. The controller will display
Monitor Mode. The Bypass can
be electrically-manually operated
using the Source Select switch
(with the Test switch in the
Disable position White lamp on).
The ATS switch can be isolated
and electrically tested (with the
Test switch in the Enable position)
or removed (White lamp off).
USB Socket to the ATC-900
Non-Auto operation of the ATS . The
controller will display Monitor Mode.
The ATS can be electrically-manually
operated using the Source Select
switch (with the Test switch in the
Disable position White lamp on). The
Bypass switch can be isolated and
electrically tested (with the Test
switch in the Enable position) or
removed (White lamp off).
The Source Select switch selects the
position of either the ATS or Bypass
switch when in the isolated position or
in the non-auto position. At least one
power source is required. Caution: In
the non-auto position, the load power
can be removed.
Auto & Enable = ATS or Bypass
Switch in Isolated test mode,
other switch is in automatic
(Green Lamp on)
Non-Auto & Disable = Manual
operation of ATS or Bypass
Switch. Monitor Mode is shown
on Controller (White lamp is on)
Non-Auto & Enable = Isolated
ATS or Bypass Switch in test.
Monitor Mode is shown on
Controller (White lamp is off)
Status for both doors.
Off
Doors are closed and
latched
Flashing At lease one door is
unlatched*
Push to test lamps, release to
determine which switch can be
isolated (Yellow Door lamp will stay on
for 2 minutes).
Status lamps for the ATS and Bypass:
Light
Rack Position
Off Racked-in (for operation)
Solid Between
Positions
Flash 1/sec
Isolated (for testing)
Flash every Racked-out (for removal)
5 sec