—
Test
Run an off-load test to verify the ATS-generator control connection. Follow steps in Figure 8. Backup
source (generator) should start and be indicated by solid green LED for secondary source. Repeating this
sequence will turn off generator.
To test ATS-generator auto operation, while in auto mode, simulate a primary source failure by
disconnecting the supply to the primary source. Verify the ATS switches to the backup source
according to set-point and time delay parameters. Re-connect the supply to the primary source. If the
ATS returns to primary source as expected, the ATS function in Auto is validated.
Lamp
test
l
ON
Off
load
test
ll
ON
Auto
Alarm reset
On
load
test
Bypass
time
delay
Dropout ∆U / ∆f
Manual
retransfer
Generator
stop delay
4 min
30 s
∆U 5% / ∆f 5%
∆U 10% / ∆f 5%
∆U 15% / ∆f 10%
∆U 20% / ∆f 10%
0
1
2
3
4
5
10
15
20
30
S1 Failure
delay [s]
S1 Return
delay [min]
On
Off
Auto
config
Start
Ok
Priority
No priority
Source 1
In-phase
monitor
Off
On
AUTO
!
S1
S2
LOAD
l
ll
Figure 8
