Keysight Technologies RP7900 Serie Guide D'utilisation Et De Maintenance page 129

PF Power-fail indicates that a power fail condition on the AC mains has occurred and has disabled the
output. PF protection is always enabled.
EDP excessive dynamic protection
For models
swings caused by programmed voltage changes, lists, Arbs, or load-induced voltage swings (see
Output Dynamic Response). If unchecked, these voltage swings could result in premature failure of
components in the unit. EDP protection is always enabled.
For models
could damage the unit. This could happen, for example, if unintended and sustained oscillations
cause large power transfers - from full power sourcing to full power sinking. Assuming that the unit is
operating within the suggested operating conditions, EDP should not engage under normal
conditions. EDP protection is always enabled.
Prot Protection indicates the output is disabled because the programmed output watchdog timer
expired. It also indicates that a PSP fault has occurred on a secondary unit.
INH The Inhibit input (pin 3) on the rear panel digital connector can be programmed to act as an
external shutdown signal. Refer to
UV For models
the low-voltage limit setting when discharging a battery. It also prevents the output from turning on if
the output voltage is below the programmed low-voltage level.
PSP A Primary/Secondary Protection fault has occurred in the paralleled group. All outputs of all
paralleled units are disabled. PSP is always enabled. Refer to
SDP A Safety Disconnect Protection fault has occurred due to a Keysight SD1000A SDS hardware or
communication failure. The unit must be rebooted to clear this protection condition. Refer to
protection for details.
DOV+ Positive DUT over-voltage is active when the output is off and then turned on in HIGHZ mode. If
the DUT is applying a voltage on the output terminals less than the following voltage levels, the
output will not turn on to prevent excessive current from flowing into the unit.
Voltage priority: if the DUT voltage exceeds the programmed voltage + 1% of the unit's rated voltage.
Current priority: if the DUT voltage exceeds the positive voltage limit + 1% of the unit's rated voltage.
DOV- Negative DUT over-voltage is active when the output is off and then turned on. If the DUT is
applying a voltage on the output terminals less than the following voltage levels, the output will not
turn on to prevent excessive current from flowing out of the unit.
Voltage priority: if the DUT voltage is less than - 1% of the unit's rated voltage.
Current priority: if the DUT voltage is less than the negative voltage limit - 1% of the unit's rated
voltage.
LOV+ Positive local over-voltage protection trips if the remote sense leads are accidentally shorted.
This protection minimizes the resulting rise in output voltage by comparing the voltage on the output
terminals to a voltage level that is 1 volt plus 10% of rating above the user-programmed positive OVP
level. If the output voltage exceeds this level the unit goes into a latched protection state. LOV is
always enabled.
LOV- Negative local over-voltage protection is not available on two-quadrant models.
Keysight RP7900 Series Operating and Service Guide
, EDP disables the output in the event of excessive large repetitive voltage
, EDP disables the output in the event of large dynamic power transfers that
Inhibit Input for details.
, under-voltage protection prevents the voltage from dropping below
4 Using the Regenerative Power System
Parallel Protection for details.
SDP
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