Sorensen DCS Series 3kW Supplies
Advanced Operation
4.4
4.4.1
4.4.2
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.
Operation Manual
4-13
