© EPS Stromversorgung in 2022, this information is subject to change without notice
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30000800_manual_psb_10000_4u_30kw_en_04
3.4.6
Safety OVP
This extra feature is only built into the
60 V model
of this series. Similar to the regular overvoltage protection (OVP, see
the Safety OVP is supposed to protect the application or people according to SELV. The alarm shall prevent the device from
providing an output voltage higher than 60 V. However, the alarm could also be triggered by an external source providing an
excess voltage to the DC input of the device.
A safety OVP alarm can occur if
•
the voltage on the DC of the device reaches the rigid threshold of 60.6 V.
•
an external voltage of higher than 60.6 V is brought onto the device.
If the voltage on the DC terminal exceeds that level for any reason, the DC terminal will be switched off and alarm
Safety OVP
will be indicated in the display. This alarm can’t be acknowledged the usual way. It requires to power-cycle the unit.
During normal operation of the power supply, this alarm should not trigger. There are, however, situations
which can trigger the alarm, like when working with voltages close to the threshold of 60.6 V or voltage
spikes when leaving CC mode when the current was 0 A before.
When remote sensing is used, i. e. the rear input “Sense” is connected, the true output voltage (source
mode) is higher than set value so the Safety OVP could already trigger at voltage settings lower than
60 V.
3.4.7
Share bus fail
A Share bus fail alarm (short: SF) will switch off the DC power stage and can occur if
•
the Share bus connectors of at least two units are already wired while at least one unit isn’t yet configured for master-slave
•
a short-circuit on the Share bus has occurred, for example due to a damaged BNC cable.
This function serves to prevent sending irregular control signals to the slave units via the Share bus or to cause them to react
differently. This alarm has to be acknowledged after the cause has been removed. Should the device neither be master nor
slave, the Share bus cable should be removed for unimpeded operation.