Xantrex XKW 12-150, Operating Manual

Page: 64 / 90

Operation
Using Over Voltage Protection (OVP)
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Operating Manual for XKW 3kW Series Power Supply
Using Over Voltage Protection (OVP)
The OVP circuit allows for protection of the load in the event of a remote
programming error, an incorrect voltage control adjustment, or a power supply
failure. The protection circuit monitors the output voltage and will reduce the output
current and voltage to zero whenever a preset voltage limit is exceeded. The preset
voltage limit, also called the set point or trip level, can be set either in local
programming mode from the front panel or by remote programming through the J3
connector on the rear panel.
The red OVP LED on the front panel will light up when the OVP circuit has been
activated.
Front Panel
OVP
Operation
In local programming mode, the OVP set point can be checked at any time by
pressing the OVP CHECK switch: the OVP set point is the value displayed on the
digital voltmeter.
To set the trip level from the front panel:
1. Adjust the power supply output to zero volts.
2. Press the OVP CHECK switch to observe the OVP set point on the voltmeter
display.
3. Turn the OVP SET potentiometer until the desired set point is reached. Release
the OVP CHECK switch.
4. Increase the power supply output voltage to check that the power supply shuts
off the output at the selected set point.
Resetting the
OVP Circuit
To reset the OVP circuit after it has been activated:
1. Reduce the power supply's output voltage setting to below the OVP set point.
2. Press the STANDBY switch IN. The Shutdown (S/D) LED on the front panel
will light up.
3. Press the STANDBY switch again to return power to the load and resume normal
operation.
OR
1. Reduce the power supply's output voltage setting to below the OVP set point.
2. Turn the power supply OFF using the AC power switch, then turn it back ON
again.
TM-25OP-01XN.book Page 62 Monday, April 5, 2004 8:58 AM