Keysight Technologies RP7900 Series, Operating And Service Manual

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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 , EDP disables the output in the event of excessive large repetitive voltage
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 , EDP disables the output in the event of large dynamic power transfers that
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 an MSP fault has occurred on a slave 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
Inhibit Input for details.
UV For models , under-voltage protection prevents the voltage from dropping below
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.
MSP A Master/Slave Protection fault has occurred in the paralleled group. The outputs of all
paralleled units are disabled. MSP is always enabled. Refer to
Parallel Protection for details.
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
SDP
protection for details.
Set the Over-Voltage Protection
The over-voltage protection will turn the output off if the output voltage reaches the programmed
over-voltage limit. The OVP circuit monitors the voltage at the + and – sense terminals. An OVP
shutdown will automatically occur if the + and – sense leads are accidentally shorted to each other.
Front Panel Menu Reference SCPI Command
Select Protect\OVP
Enter a value in the OVP level box. Then press Select .
To set the OVP level to 400 volts:
VOLT:PROT 400
Set the Over-Current Protection
Enable OCP
With over-current protection enabled, the output turns off when the output current reaches the
current limit setting and transitions from constant voltage (CV) to current limit (CL+ or CL-).
4 Using the Regenerative Power System
120 Keysight RP7900 Series Operating and Service Guide