Xantrex Watt Series Programmable DC Power Supply XG..., Operating Manual

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Using Under Voltage Protection (UVP)
M370078-01 3-27
3
Using Under Voltage Protection (UVP)
The UVP prevents voltage settings below a set value. The UVP lets you
create a voltage window of operation when used in conjunction with the
OVP setting. The UVP range is variable from 0 V to OVP
SET
–10%.
The UVP is a protection that becomes active after the output is enabled
and a period of time has passed to allow the output to reach its set point
value before the UVP protection begins monitoring. As with OVP if the
voltage set point is determined by analog control (VAP) and the voltage
strays to within 5% of the UVP set point then UVP Safe will trigger to
warn the user that they are about to trigger the UVP alarm.
The period of time before the UVP monitoring is active after the output is
enabled is determined by the rise-time delay for the model as listed in
Table C-2, “Remote Operation” on page C–4 on the row called Up-prog
Response Time, 0 - Vmax. Since the rise time is based on a purely
resistive load the user should be aware that UVP triggering might be
possible in capacitive or rectifier loads due to the rise time being longer.
In these cases it is recommended that the user mask the UVP alarm until
the rise time has elapsed and then unmask the alarm to allow UVP
protection to be enabled during operation.
Important:
UVP will not be active for voltage set points that are less than 1%
of model voltage.