www.pulsar.pl
EN54-3A28
RED POWER
29
6.8. Overvoltage protection of the PSU output OVP.
In case of voltage exceeding 30,5
V±0.5V at the switching regulator’s output, the system cuts off
the power at the outputs to protect the battery and the receivers from damage. The outputs will be battery-
powered. The activation of the protection system is indicated by the OVP
yellow
LED on the PCB board, and the
PSU FLT and ALARM outputs.
6.9. PSU overload.
The PSU is fitted with the LED OVL (overload) on the PCB and
indicator on the LED panel,
informing about output overload. If the nominal current of the PSU is exceeded, the led turns on and the
microprocessor starts a specially implemented procedure. Depending on time and overload level,
microprocessor may disconnect the AUX1 and AUX2 outputs and switch into the battery-assisted operation.
Restart will occur after 1 minute.
PSU overload is indicated by the PSU FLT and ALARM technical outputs.
6.10. Indication of exceeding Imax a current.
Exceeding the "Imax a" output current during the power supply operation is indicated by the
microprocessor using the LED OVL light (overload) on the PCB and LED indicator light
on the LED panel
of the power supply after 30 seconds.
Information about exceeding the
„Imax a” current is stored in the history of events. Battery charge current is
limited in order to protect the power supply against overload.
6.11. Short-circuit of the PSU output.
In case of short-circuit of the AUX1 or AUX2 output, one of the fuses - F
AUX1
or F
AUX2
– becomes
permanently blown. The restoration of the voltage at the output requires the replacement of the fuse
