Xantrex Technology XG 850 manual Using Under Voltage Protection UVP

	Using Under Voltage Protection (UVP)
Using Under Voltage Protection (UVP)
	Important: UVP will not be active for voltage set points that are less than 1%
	of model voltage.
	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 OVPSET –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	3
	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.

M370078-01 3-27