Eaton STS Serie Manuel D'installation Et D'utilisation page 15

Operation
It is assumed here that source S1 is the
preferred source (button 2 in the up
position).
The LEDs 1 indicate the voltage status
of the sources S1 and S2.
green indicates that the voltage is
z
within tolerances (±12 % of the rated
voltage).
red indicates that the voltage is outside
z
tolerances.
The LEDs 3 indicate the operating status
of the sources S1 and S2.
OFF: source not used.
z
green: preferred source supplying
z
power.
yellow: alternate source supplying
z
power.
The applications are supplied with power
if either of the two LEDs is ON.
LED 4 is red if an internal fault has
occurred in the STS module. Contact the
EATON after-sales technical support.
In addition to the LEDs, the buzzer 6
sounds in the following events:
source S1 or source S2 outside
z
tolerances;
internal fault in the STS module.
z
Once the problem has been identified,
the buzzer may be turned off by pressing
button 5 .
Page 12 - 51027617EN/AI
S1
S2
1
Fig. 11
rectifier
AC
source
UPS S1
rectifier
AC
source
UPS S2
Fig. 12
Note: to make source S2 the priority
source (for example, if maintenance is
required on source S1), simply press
button 2 .
2 3 4 5
STS
inverter
S1
battery
inverter
S2
battery
6
to the
sensitive
equipment