OPM_STS_400_25A_100_1GB_V011
21
GE DE STS: installation and operating manual 1.1 (GB)
Digital Energy
™
Static Transfer Switch
g
The STS operates in one of the following three modes:
Preferred source mode –
the selected preferred source supplies the load.
The load is transferred to the other source if the voltage of the preferred source is outside acceptable range.
Automatic retransferring mode
– After a transfer triggered by disturbances in the preferred source, the
load is transferred again to the preferred source with a minimum delay of 6 seconds if the preferred source is
healthy again.
Manual mode
– connections are set manually (not automatically).
4.1 Operation
mode
settings
Three buttons on the control panel determine the current operation mode: OPERATION, RETRANSFER and
PREFERRED SOURCE.
Figure 7. Control panel
4.1.1 Preferred source selection
Button designation
Position
Operation
PRIMARY –
button is released
PRIMARY SOURCE or REMOTE CONTROL
selected.
*NOTE
PREFERRED SOURCE
SECONDARY –
button is pushed
SECONDARY SOURCE selected. SECONDARY
BUTTON LED is on.
*NOTE
If remote control signal is connected, its selection is valid. Preferred source may be
selected by remote signal when switch PREFERRED SOURCE is set into
“PRIMARY” position. If MANUAL mode is on, remote control is not active.
4 - Operation
