UPSI-2412
Revision 1
26
Short circuit:
In the event of a short-circuit at the output of the UPS, the output is immediately disconnected (<5 ms). The
status LED indicates the error status by means of a very rapid flashing sequence. A restart attempt occurs every
second in normal mode (non-latch). During battery mode there is no restart attempt. The impact of a short-
circuit to the device depends on length and diameter (impedance) of the output wiring. In case of a short-circuit
directly at the plugs a damage of the device can occur.
F11 Backup time in battery mode
The nominal backup times can be found within the user manuals or the datasheets of the used energy
storages. At extreme low or high temperatures a reduction of the nominal backup times can occur.
F12 Behaviour in case of exceeding maximum backup time
When the given buffering times are exceeded, the output is separated on the basis of the discharge voltage of
the corresponding energy storage (total discharge protection).
With supercapacitors in particular, an additional switch-off threshold can take effect if the discharge current of
the energy storage device is too high (>15 A). This can occur at very high load currents at the output of UPSI-
2412. The lower the voltage of the energy storage device decreases, the higher the discharge current so that
a constant power is ensured at the output of the UPS.
If the allowable output current during battery mode exceeds more than 70 %, the converter switches off first,
without separating the output immediately. In this case, the voltage at the output of the UPSI-2412 can drop
significantly below 23.5 V. This condition should be avoided by shutting down the system in time.
F13 Battery start
This function enables the application or the device to be started from the battery up to a maximum load cur-
rent of 7 A without the power supply being available or connected. To do this, the button S3 has to be pressed
for more than 2 seconds (max. 5 s). This is usually only useful with a BP-LFP-2725, because with supercapacitors
the chemically induced self-discharge does not allow a battery start already after a few minutes.
Summary of Contents for UPSI-2412
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