Using Over Voltage Protection (Ovp); Front Panel Ovp Operation - Xantrex XHR 7.5-130 Operating Manual

Using Over Voltage Protection (OVP)

The OVP circuit protects 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 shut down the main power converter
whenever a preset voltage limit is exceeded. Set the preset voltage limit (also called
the set point or trip level) using the screwdriver-adjustable potentiometer on the front
panel or via one of the optional GPIB or RS-232 programming interfaces.
Notes:
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Front Panel In local control mode, check the OVP set point at any time by pressing the OVP
CHECK switch. The OVP set point is the value displayed on the digital voltmeter.
OVP
Operation
To set the trip level from the front panel:
1. Disconnect any loads. Turn the power supply ON.
2. Adjust the power supply voltage to any voltage lower than the desired trip level.
3. Press the front panel STANDBY (output shutdown) switch to its IN position.
4. Press the OVP CHECK switch to observe the OVP set point on the voltmeter
5. Holding down the OVP CHECK switch, turn the OVP SET potentiometer until
6. Release the STANDBY switch to its OUT position. The S/D LED turns OFF.
7. To check that the power supply shuts off at the desired set point, slowly increase
Revision A
The default preset limit is approximately 110% of the rated output voltage.
When using OVP with remote sensing lines connected, compensate for the
voltage line drop across the output return line by measuring or calculating the
line drop, then adding this value to the desired OVP setpoint.
display.
the desired set point is reached. Release the OVP CHECK switch.
the output voltage while monitoring the front panel voltmeter. The OVP LED on
the front panel will turn on when the OVP circuit activates.
Local Operation
Using Over Voltage Protection (OVP)
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