Operation; Operation Mode Settings; Preferred Source Selection - GE Digital Energy STS-400-25-3 Installation And Operating Manual

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Digital Energy Static Transfer Switch
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.
4.1.1

Preferred source selection

Button designation
PREFERRED SOURCE
*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.
OPM_STS_400_25A_100_1GB_V011

4 - Operation

Figure 7. Control panel
Position
PRIMARY –
button is released
SECONDARY –
button is pushed
21
Operation
PRIMARY SOURCE or REMOTE CONTROL
selected.
*NOTE
SECONDARY SOURCE selected. SECONDARY
BUTTON LED is on.
GE DE STS: installation and operating manual 1.1 (GB)
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