User`s guide
®
USER’S GUIDE
AUTOMATIC TRANSFER SWITCH
17
Switch configuration menu
Item Definition
Line VRMS Nominal source line voltage setting for this device.
Line Frequency Nominal source frequency setting for this device.
Preferred Source Power source that will be used when both sources are acceptable.
Sensitivity Sensitivity of the Automatic Transfer Switch to changes in voltage.
• Low: Causes the Automatic Transfer Switch to accept frequent,
small line voltage changes without switching to the alternate
power source.
• High: Causes the Automatic Transfer Switch to switch to the
alternate power source in response to small line voltage
changes. Provides the best protection for sensitive equipment.
VRMS Range Defines the range of acceptable voltage from a power source. If
the voltage of the selected input source is not within this range,
the Automatic Transfer Switch transfers to the alternate power
source. Options are Wide, Medium, and Narrow.
Narrow VRMS
Limit
The voltage range to use when VRMS range is set to narrow.
Medium VRMS
Limit
The voltage range to use when VRMS range is set to medium.
Wide VRMS Limit The voltage range to use when VRMS range is set to wide.
Alarm Current
Threshold
The threshold, in Amps, at which an Over Current Alarm is
generated.
Freq Deviation Range of frequency fluctuation (maximum is ±3Hz).
Front Panel Select Lock or unlock the source-switching button on the front panel of
the Automatic Transfer Switch.