IB140015EN
For more information visit: www.Eaton.com
Instructional Booklet
Effective: August 2014
Page
27
ATC-900 Magnum Tranfer Switch O & M Manual
The fixed switching device frame has two mounting feet, one on
each side, to permit the fixed switching device to be securely
mounted. Each mounting foot has two slotted mounting holes
which are used to bolt the switching device securely in place. Use
either 3/8” or M 10 bolts for this purpose. Refer to the dimen-
sional drawings supplied with the transfer switch for switching
device and bus stab dimensions.
6.3 Switching Device Operation
Switching devices should be operated manually and/or electrically
before they are put into service. This can be done during the
installation process or some later date prior to start-up. To check
the switching device operation, follow the operational procedures
outlined in switching device manual supplied with the transfer
switch for both manually operated and electrically operated
switching devices.
Section 7: Operation of the Bypass Isolation
Transfer Switch
7.1 Operator Panel
The design of this transfer switch allows quick removal of the dif-
ferent switching devices for inspection or maintenance or, if
required, quick replacement.
Depending on the optional features selected by the customer the
bypass isolation switch will have two operator panels with
switches and lights (Figure
36 and 37
).
Figure 36.Typical Bypass Isolation Transfer Switch Device Panel.
The left door control panel will have following standard features:
1. AMBER LED on the ATC-900 Controller to indicate if the
Source 1 power source is available.
2. AMBER LED on the ATC-900 Controller to indicate if the
Source 2 power source is available.
3. GREEN LED on the ATC-900 Controller to indicate if the
Source 1position is energized, that is, the Source 1 switching
device in the automatic transfer switch is closed.
4. RED LED on the ATC-900 Controller to indicate if the Source
2 position is energized, that is, the Source 2 switching device
in the automatic transfer switch is closed.
5. The Engine Test Pushbutton can be pressed twice and
released with the ATC-900 controller in the status state to ini-
tiate a self test. This test can be initiated and accomplished
while in the Run or Program Modes. Pressing the Engine Test
Pushbutton again while in the engine run condition aborts the
test.
Upon test initiation, a generator start of the non-preferred
source is engaged after TDES timeout. If a full test is pro-
grammed, a transfer with all programmed timers occurs. The
test engine run timer will hold the load for the required time-
out and the test is concluded with a re-transfer cycle. For an
engine run only test, no transfer will occur and the engine will
run for the programmed run time.
6. Three-position selector switch to control the generator:
•
AUTO - The intelligence circuit of the transfer switch will
start the generator if the Source 1 power source is not
available.
•
OFF - The intelligence circuit of the transfer switch will not
be able to start the generator, which eliminates nuisance
starts during maintenance.
•
RUN - The generator will run regardless of the availability
of the Source 1 power source.
Option 6H
