American Power Conversion 250 A - Manual (Page 51)

Testing
InfraStruXure Power Generation System 41
How a test occurs
When a test is not in progress, the
ATS waits for a test to occur.
Initiate a test by scheduling one
using the Test Schedule screen
on the display interface, or by
starting a test immediately
through the Run/View Test
screen. Once you have initiated a
test, the ATS starts counting
down until the next test will begin
(the Next Test item on the Test
Schedule menu). Once the Next
Test time expires, the ATS will
signal the generator to start. The
generator will then crank in an
attempt to start. If the generator
does not start, the test fails and
the ATS logs that the test failed. If
the generator starts, and the ATS
determines that Source 2 is OK,
the test will begin with the
configurable Warm Up time.
Once the Warm Up time expires,
the ATS determines whether or
not you want to perform a System
Load Test. This is a test the
generator runs with the data
center load applied.
If the test does not include a
System Load Test, the ATS
proceeds to the unloaded test
stage. If the test includes a System Load Test, the ATS transfers to Source 2. The transfer can be open or
closed, depending on how the Allow Closed setting is configured on the ATS Setup menu. The load test occurs
for the length of the Loaded time and, once the loaded time expires, the ATS will retransfer to Source 1 and
then proceed to the unloaded test stage.
During the unloaded test stage, the generator runs for the duration of the configurable Unloaded Test time.
Once the Unloaded Test time expires, the generator stops and the ATS logs either that the test was successful
or that it failed. The ATS displays test results on the View Test Log menu on the Testing screen.
ATS Waiting
to Test
Scheduled or Manual Test Initiated
ATS Test
Countdown
Countdown Expires
Generator
Cranking
Source 2 is Good
ATS Test
Warm-Up
Warm-up Time Expires
Load Test?
Yes
Loaded time expires
Unloaded time expires
Log
Test
Failed
Log
Test
Passed
No
Test ATS
With Load
Unloaded
Test
Generator
Stopping